From f0120dea337c9afce26f51dc1e610cf5396ded51 Mon Sep 17 00:00:00 2001
From: Jake Bailey <5341706+jakebailey@users.noreply.github.com>
Date: Thu, 6 Nov 2025 09:26:55 -0800
Subject: [PATCH 1/4] Split "use strict" into separate transformer, fix bugs
 with prologues

---
 internal/compiler/emitter.go                  |  2 +
 internal/printer/factory.go                   |  2 +-
 internal/printer/printer.go                   |  4 +-
 .../transformers/estransforms/usestrict.go    | 55 +++++++++++++++++++
 .../moduletransforms/commonjsmodule.go        |  6 --
 5 files changed, 60 insertions(+), 9 deletions(-)
 create mode 100644 internal/transformers/estransforms/usestrict.go

diff --git a/internal/compiler/emitter.go b/internal/compiler/emitter.go
index 62f3e16285..51fd655120 100644
--- a/internal/compiler/emitter.go
+++ b/internal/compiler/emitter.go
@@ -125,6 +125,8 @@ func getScriptTransformers(emitContext *printer.EmitContext, host printer.EmitHo
 		tx = append(tx, downleveler)
 	}
 
+	tx = append(tx, estransforms.NewUseStrictTransformer(&opts))
+
 	// transform module syntax
 	tx = append(tx, getModuleTransformer(&opts))
 
diff --git a/internal/printer/factory.go b/internal/printer/factory.go
index b276a3b293..4857c6ed0e 100644
--- a/internal/printer/factory.go
+++ b/internal/printer/factory.go
@@ -399,7 +399,7 @@ func (f *NodeFactory) SplitStandardPrologue(source []*ast.Statement) (prologue [
 			return source[:i], source[i:]
 		}
 	}
-	return nil, source
+	return source, nil
 }
 
 // Splits a slice of statements into two parts: custom prologue statements (e.g., with `EFCustomPrologue` set) and the rest of the statements
diff --git a/internal/printer/printer.go b/internal/printer/printer.go
index 85ee988b56..2b3232ea31 100644
--- a/internal/printer/printer.go
+++ b/internal/printer/printer.go
@@ -1558,10 +1558,10 @@ func (p *Printer) emitFunctionBody(body *ast.Block) {
 
 	if p.shouldEmitBlockFunctionBodyOnSingleLine(body) && statementOffset == 0 && pos == p.writer.GetTextPos() {
 		p.decreaseIndent()
-		p.emitList((*Printer).emitStatement, body.AsNode(), body.Statements, LFSingleLineFunctionBodyStatements)
+		p.emitListRange((*Printer).emitStatement, body.AsNode(), body.Statements, LFSingleLineFunctionBodyStatements, statementOffset, -1)
 		p.increaseIndent()
 	} else {
-		p.emitList((*Printer).emitStatement, body.AsNode(), body.Statements, LFMultiLineFunctionBodyStatements)
+		p.emitListRange((*Printer).emitStatement, body.AsNode(), body.Statements, LFMultiLineFunctionBodyStatements, statementOffset, -1)
 	}
 
 	p.emitDetachedCommentsAfterStatementList(body.AsNode(), body.Statements.Loc, detachedState)
diff --git a/internal/transformers/estransforms/usestrict.go b/internal/transformers/estransforms/usestrict.go
new file mode 100644
index 0000000000..35d4abf327
--- /dev/null
+++ b/internal/transformers/estransforms/usestrict.go
@@ -0,0 +1,55 @@
+package estransforms
+
+import (
+	"github.com/microsoft/typescript-go/internal/ast"
+	"github.com/microsoft/typescript-go/internal/core"
+	"github.com/microsoft/typescript-go/internal/transformers"
+)
+
+func NewUseStrictTransformer(opts *transformers.TransformOptions) *transformers.Transformer {
+	tx := &useStrictTransformer{
+		compilerOptions:           opts.CompilerOptions,
+		getEmitModuleFormatOfFile: opts.GetEmitModuleFormatOfFile,
+	}
+	return tx.NewTransformer(tx.visit, opts.Context)
+}
+
+type useStrictTransformer struct {
+	transformers.Transformer
+	compilerOptions           *core.CompilerOptions
+	getEmitModuleFormatOfFile func(file ast.HasFileName) core.ModuleKind
+}
+
+func (tx *useStrictTransformer) visit(node *ast.Node) *ast.Node {
+	if node.Kind != ast.KindSourceFile {
+		return node
+	}
+	return tx.visitSourceFile(node.AsSourceFile())
+}
+
+func (tx *useStrictTransformer) visitSourceFile(node *ast.SourceFile) *ast.Node {
+	if node.ScriptKind == core.ScriptKindJSON {
+		return node.AsNode()
+	}
+
+	if tx.compilerOptions.GetEmitModuleKind() == core.ModuleKindPreserve {
+		return node.AsNode()
+	}
+
+	isExternalModule := ast.IsExternalModule(node)
+	format := tx.getEmitModuleFormatOfFile(node)
+
+	if isExternalModule && format >= core.ModuleKindES2015 {
+		return node.AsNode()
+	}
+
+	if isExternalModule ||
+		tx.compilerOptions.AlwaysStrict.DefaultIfUnknown(tx.compilerOptions.Strict).IsTrue() {
+		statements := tx.Factory().EnsureUseStrict(node.Statements.Nodes)
+		statementList := tx.Factory().NewNodeList(statements)
+		statementList.Loc = node.Statements.Loc
+		return tx.Factory().UpdateSourceFile(node, statementList, node.EndOfFileToken).AsSourceFile().AsNode()
+	}
+
+	return node.AsNode()
+}
diff --git a/internal/transformers/moduletransforms/commonjsmodule.go b/internal/transformers/moduletransforms/commonjsmodule.go
index 8f39ecdd78..27b3c50f3e 100644
--- a/internal/transformers/moduletransforms/commonjsmodule.go
+++ b/internal/transformers/moduletransforms/commonjsmodule.go
@@ -297,12 +297,6 @@ func (tx *CommonJSModuleTransformer) transformCommonJSModule(node *ast.SourceFil
 	prologue, rest := tx.Factory().SplitStandardPrologue(node.Statements.Nodes)
 	statements := slices.Clone(prologue)
 
-	// ensure "use strict" if not present
-	if ast.IsExternalModule(tx.currentSourceFile) ||
-		tx.compilerOptions.AlwaysStrict.DefaultIfUnknown(tx.compilerOptions.Strict).IsTrue() {
-		statements = tx.Factory().EnsureUseStrict(statements)
-	}
-
 	// emit custom prologues from other transformations
 	custom, rest := tx.Factory().SplitCustomPrologue(rest)
 	statements = append(statements, core.FirstResult(tx.topLevelVisitor.VisitSlice(custom))...)

From fd47f6b738b6845b505d2147f4cb4272f4dcfb64 Mon Sep 17 00:00:00 2001
From: Jake Bailey <5341706+jakebailey@users.noreply.github.com>
Date: Thu, 6 Nov 2025 09:27:45 -0800
Subject: [PATCH 2/4] Update baselines

---
 .../compiler/jsxNestedIndentation.js          |   1 +
 .../deepElementAccessExpressionInJS.js        |   1 +
 .../compiler/abstractIdentifierNameStrict.js  |   1 -
 .../abstractIdentifierNameStrict.js.diff      |   9 -
 .../compiler/acceptSymbolAsWeakType.js        |   1 +
 .../compiler/acceptSymbolAsWeakType.js.diff   |  10 -
 ...onExpressionGenericIntersectionNoCrash1.js |   1 +
 ...ressionGenericIntersectionNoCrash1.js.diff |   6 +-
 ...onExpressionGenericIntersectionNoCrash2.js |   1 +
 ...ressionGenericIntersectionNoCrash2.js.diff |   8 -
 ...cFunctionWithRestBehavedSameAsUnaliased.js |   1 +
 ...tionWithRestBehavedSameAsUnaliased.js.diff |  10 -
 .../submodule/compiler/alwaysStrict.js        |   1 +
 .../submodule/compiler/alwaysStrict.js.diff   |  10 -
 .../submodule/compiler/alwaysStrictES6.js     |   1 +
 .../compiler/alwaysStrictES6.js.diff          |  10 -
 .../submodule/compiler/alwaysStrictModule.js  |   1 +
 .../compiler/alwaysStrictModule.js.diff       |  10 -
 ...rayFakeFlatNoCrashInferenceDeclarations.js |   1 +
 ...keFlatNoCrashInferenceDeclarations.js.diff |   6 +-
 .../compiler/arrayFlatNoCrashInference.js     |   1 +
 .../arrayFlatNoCrashInference.js.diff         |  10 -
 .../arrayFlatNoCrashInferenceDeclarations.js  |   1 +
 ...ayFlatNoCrashInferenceDeclarations.js.diff |  10 -
 ...sertionFunctionsCanNarrowByDiscriminant.js |   1 +
 ...onFunctionsCanNarrowByDiscriminant.js.diff |  10 -
 .../assignmentToInstantiationExpression.js    |   1 +
 ...ssignmentToInstantiationExpression.js.diff |   6 +-
 .../asyncFunctionContextuallyTypedReturns.js  |   1 +
 ...ncFunctionContextuallyTypedReturns.js.diff |   5 +-
 ...ryArithmeticControlFlowGraphNotTooLarge.js |   1 +
 ...thmeticControlFlowGraphNotTooLarge.js.diff |  10 -
 .../blockScopedBindingsReassignedInLoop1.js   |   1 -
 ...ockScopedBindingsReassignedInLoop1.js.diff |  10 -
 ...oleanLiteralsContextuallyTypedFromUnion.js |   1 +
 ...LiteralsContextuallyTypedFromUnion.js.diff |  10 -
 .../submodule/compiler/builtinIterator.js     |   1 +
 .../compiler/builtinIterator.js.diff          |  10 -
 .../compiler/capturedLetConstInLoop12.js      |   2 -
 .../compiler/capturedLetConstInLoop12.js.diff |  16 -
 .../compiler/capturedLetConstInLoop14.js      |   1 +
 .../compiler/capturedLetConstInLoop14.js.diff |  10 -
 .../compiler/circularAccessorAnnotations.js   |   1 +
 .../circularAccessorAnnotations.js.diff       |  10 -
 .../submodule/compiler/circularBaseTypes.js   |   1 +
 .../compiler/circularBaseTypes.js.diff        |  10 -
 .../compiler/circularContextualMappedType.js  |   1 +
 .../circularContextualMappedType.js.diff      |  10 -
 .../compiler/circularContextualReturnType.js  |   1 +
 .../circularContextualReturnType.js.diff      |  10 -
 .../classAttributeInferenceTemplate.js        |   1 +
 .../classAttributeInferenceTemplate.js.diff   |  10 -
 ...lassFieldsBrokenConstructorEmitNoCrash1.js |   1 +
 ...ieldsBrokenConstructorEmitNoCrash1.js.diff |   6 +-
 .../classImplementsMethodWIthTupleArgs.js     |   1 +
 ...classImplementsMethodWIthTupleArgs.js.diff |   7 -
 .../compiler/classPropertyErrorOnNameOnly.js  |   1 +
 .../classPropertyErrorOnNameOnly.js.diff      |   7 +-
 .../compiler/classStaticPropertyAccess.js     |   1 +
 .../classStaticPropertyAccess.js.diff         |   7 +-
 .../compiler/classVarianceCircularity.js      |   1 +
 .../compiler/classVarianceCircularity.js.diff |  10 +-
 .../classVarianceResolveCircularity1.js       |   1 +
 .../classVarianceResolveCircularity1.js.diff  |   7 +-
 .../compiler/coAndContraVariantInferences.js  |   1 +
 .../coAndContraVariantInferences.js.diff      |  10 +-
 .../compiler/coAndContraVariantInferences2.js |   1 +
 .../coAndContraVariantInferences2.js.diff     |  10 -
 .../compiler/coAndContraVariantInferences3.js |   1 +
 .../coAndContraVariantInferences3.js.diff     |  10 -
 .../compiler/coAndContraVariantInferences4.js |   1 +
 .../coAndContraVariantInferences4.js.diff     |  10 -
 ...edIndexesOfIntersectionsAreInferencable.js |   1 +
 ...exesOfIntersectionsAreInferencable.js.diff |  10 -
 .../compiler/computedEnumTypeWidening.js      |   1 +
 .../compiler/computedEnumTypeWidening.js.diff |   9 +-
 .../computedPropertiesWithSetterAssignment.js |   1 +
 ...utedPropertiesWithSetterAssignment.js.diff |  10 -
 ...ypeContextualTypeSimplificationsSuceeds.js |   1 +
 ...ntextualTypeSimplificationsSuceeds.js.diff |  10 -
 .../conditionalTypesSimplifyWhenTrivial.js    |   1 +
 ...onditionalTypesSimplifyWhenTrivial.js.diff |  10 -
 ...ameterPropertiesAndPrivateFields.es2015.js |   1 -
 ...rPropertiesAndPrivateFields.es2015.js.diff |   1 -
 .../constructorWithSuperAndPrologue.es5.js    |   1 -
 ...onstructorWithSuperAndPrologue.es5.js.diff |  10 -
 .../contextSensitiveReturnTypeInference.js    |   1 +
 ...ontextSensitiveReturnTypeInference.js.diff |  10 -
 ...ListFromUnionWithPrimitiveNoImplicitAny.js |   1 +
 ...romUnionWithPrimitiveNoImplicitAny.js.diff |  10 -
 .../contextualSignatureInstantiation4.js      |   1 +
 .../contextualSignatureInstantiation4.js.diff |  10 -
 .../contextualTupleTypeParameterReadonly.js   |   1 +
 ...ntextualTupleTypeParameterReadonly.js.diff |  10 -
 ...eForInitalizedVariablesFiltersUndefined.js |   1 +
 ...nitalizedVariablesFiltersUndefined.js.diff |  10 -
 .../compiler/contextualTypeIterableUnions.js  |   1 +
 .../contextualTypeIterableUnions.js.diff      |  10 -
 .../contextualTypeOfIndexedAccessParameter.js |   1 +
 ...extualTypeOfIndexedAccessParameter.js.diff |  10 -
 .../compiler/contextualTypeOnYield1.js        |   1 +
 .../compiler/contextualTypeOnYield1.js.diff   |  10 -
 .../compiler/contextualTypeOnYield2.js        |   1 +
 .../compiler/contextualTypeOnYield2.js.diff   |  10 -
 .../compiler/contextualTypeShouldBeLiteral.js |   1 +
 .../contextualTypeShouldBeLiteral.js.diff     |  10 -
 .../contextuallyTypedBooleanLiterals.js       |   1 +
 .../contextuallyTypedBooleanLiterals.js.diff  |  10 -
 .../contextuallyTypedSymbolNamedProperties.js |   1 +
 ...extuallyTypedSymbolNamedProperties.js.diff |  10 -
 .../contravariantInferenceAndTypeGuard.js     |   1 +
 ...contravariantInferenceAndTypeGuard.js.diff |  10 -
 .../contravariantTypeAliasInference.js        |   1 +
 .../contravariantTypeAliasInference.js.diff   |  10 -
 .../controlFlowAliasedDiscriminants.js        |   1 +
 .../controlFlowAliasedDiscriminants.js.diff   |  10 -
 .../controlFlowAnalysisOnBareThisKeyword.js   |   1 +
 ...ntrolFlowAnalysisOnBareThisKeyword.js.diff |  10 -
 .../compiler/controlFlowAutoAccessor1.js      |   1 +
 .../compiler/controlFlowAutoAccessor1.js.diff |  10 -
 .../controlFlowBreakContinueWithLabel.js      |   1 +
 .../controlFlowBreakContinueWithLabel.js.diff |  10 -
 ...owCommaExpressionAssertionWithinTernary.js |   1 +
 ...maExpressionAssertionWithinTernary.js.diff |  10 -
 .../compiler/controlFlowDestructuringLoop.js  |   1 +
 .../controlFlowDestructuringLoop.js.diff      |  10 -
 ...rolFlowDestructuringVariablesInTryCatch.js |   1 +
 ...owDestructuringVariablesInTryCatch.js.diff |  10 -
 .../controlFlowFinallyNoCatchAssignments.js   |   1 +
 ...ntrolFlowFinallyNoCatchAssignments.js.diff |  10 -
 .../compiler/controlFlowForCatchAndFinally.js |   1 +
 .../controlFlowForCatchAndFinally.js.diff     |   5 +-
 ...olFlowInitializedDestructuringVariables.js |   1 +
 ...wInitializedDestructuringVariables.js.diff |   8 -
 ...rolFlowManyCallExpressionStatementsPerf.js |   1 +
 ...owManyCallExpressionStatementsPerf.js.diff |  10 -
 .../compiler/controlFlowNullTypeAndLiteral.js |   1 +
 .../controlFlowNullTypeAndLiteral.js.diff     |  10 -
 .../compiler/controlFlowPrivateClassField.js  |   1 +
 .../controlFlowPrivateClassField.js.diff      |  10 -
 .../submodule/compiler/correlatedUnions.js    |   1 +
 .../compiler/correlatedUnions.js.diff         |  10 +-
 .../submodule/compiler/crashRegressionTest.js |   1 -
 .../compiler/crashRegressionTest.js.diff      |   3 +-
 .../declarationEmitTypeofThisInClass.js       |   1 +
 .../declarationEmitTypeofThisInClass.js.diff  |   6 +-
 .../compiler/deeplyNestedConditionalTypes.js  |   1 +
 .../deeplyNestedConditionalTypes.js.diff      |  10 -
 .../compiler/deeplyNestedConstraints.js       |   1 +
 .../compiler/deeplyNestedConstraints.js.diff  |  10 -
 .../compiler/deferredConditionalTypes.js      |   1 +
 .../compiler/deferredConditionalTypes.js.diff |   7 -
 .../compiler/deferredLookupTypeResolution.js  |   1 +
 .../deferredLookupTypeResolution.js.diff      |  10 -
 .../compiler/deferredLookupTypeResolution2.js |   1 +
 .../deferredLookupTypeResolution2.js.diff     |   9 -
 ...teExpressionMustBeOptional(strict=true).js |   1 +
 ...ressionMustBeOptional(strict=true).js.diff |  10 -
 ...=true,useunknownincatchvariables=false).js |   1 +
 ...,useunknownincatchvariables=false).js.diff |  10 -
 ...t=true,useunknownincatchvariables=true).js |   1 +
 ...e,useunknownincatchvariables=true).js.diff |  10 -
 ...ingInitializerContextualTypeFromContext.js |   1 +
 ...itializerContextualTypeFromContext.js.diff |  10 -
 .../destructuringTempOccursAfterPrologue.js   |   2 -
 ...structuringTempOccursAfterPrologue.js.diff |  10 -
 .../submodule/compiler/destructuringTuple.js  |   1 +
 .../compiler/destructuringTuple.js.diff       |  10 -
 .../compiler/destructuringWithConstraint.js   |   1 +
 .../destructuringWithConstraint.js.diff       |  10 -
 .../discriminantNarrowingCouldBeCircular.js   |   1 +
 ...scriminantNarrowingCouldBeCircular.js.diff |  10 -
 .../compiler/discriminateObjectTypesOnly.js   |   1 +
 .../discriminateObjectTypesOnly.js.diff       |  10 -
 .../compiler/discriminatedUnionJsxElement.js  |   1 +
 .../discriminatedUnionJsxElement.js.diff      |  10 -
 .../submodule/compiler/divergentAccessors1.js |   1 +
 .../compiler/divergentAccessors1.js.diff      |  10 -
 .../compiler/divergentAccessorsTypes1.js      |   1 +
 .../compiler/divergentAccessorsTypes1.js.diff |  10 -
 .../compiler/divergentAccessorsTypes2.js      |   1 +
 .../compiler/divergentAccessorsTypes2.js.diff |  10 -
 .../compiler/divergentAccessorsVisibility1.js |   1 +
 .../divergentAccessorsVisibility1.js.diff     |  10 -
 .../compiler/duplicateErrorAssignability.js   |   1 +
 .../duplicateErrorAssignability.js.diff       |  10 -
 .../compiler/duplicateErrorClassExpression.js |   1 +
 .../duplicateErrorClassExpression.js.diff     |   6 +-
 ...BeforeEmitParameterPropertyDeclaration1.js |   2 -
 ...eEmitParameterPropertyDeclaration1.js.diff |   5 +-
 ...oreEmitParameterPropertyDeclaration1ES6.js |   2 -
 ...itParameterPropertyDeclaration1ES6.js.diff |   5 +-
 ...SuperCallBeforeEmitPropertyDeclaration1.js |   2 -
 ...CallBeforeEmitPropertyDeclaration1.js.diff |   2 -
 ...erCallBeforeEmitPropertyDeclaration1ES6.js |   1 -
 ...lBeforeEmitPropertyDeclaration1ES6.js.diff |   1 -
 ...arationAndParameterPropertyDeclaration1.js |   2 -
 ...onAndParameterPropertyDeclaration1.js.diff |   2 -
 ...tionAndParameterPropertyDeclaration1ES6.js |   2 -
 ...ndParameterPropertyDeclaration1ES6.js.diff |   2 -
 .../compiler/enumAssignmentCompat7.js         |   1 +
 .../compiler/enumAssignmentCompat7.js.diff    |  10 -
 .../errorOnEnumReferenceInCondition.js        |   1 +
 .../errorOnEnumReferenceInCondition.js.diff   |  10 -
 ...eventEmitterPatternWithRecordOfFunction.js |   1 +
 ...EmitterPatternWithRecordOfFunction.js.diff |   7 -
 .../compiler/evolvingArrayResolvedAssert.js   |   1 +
 .../evolvingArrayResolvedAssert.js.diff       |  10 -
 .../compiler/excessPropertiesInOverloads.js   |   1 +
 .../excessPropertiesInOverloads.js.diff       |   8 -
 ...ertyCheckIntersectionWithIndexSignature.js |   1 +
 ...heckIntersectionWithIndexSignature.js.diff |  10 -
 .../compiler/excessPropertyCheckWithUnions.js |   1 +
 .../excessPropertyCheckWithUnions.js.diff     |  10 -
 .../exhaustiveSwitchCheckCircularity.js       |   1 +
 .../exhaustiveSwitchCheckCircularity.js.diff  |  10 -
 .../expressionWithJSDocTypeArguments.js       |   1 +
 .../expressionWithJSDocTypeArguments.js.diff  |   6 +-
 .../compiler/firstMatchRegExpMatchArray.js    |   1 +
 .../firstMatchRegExpMatchArray.js.diff        |  10 -
 .../flatArrayNoExcessiveStackDepth.js         |   1 +
 .../flatArrayNoExcessiveStackDepth.js.diff    |  10 -
 ...orwardRefInTypeDeclaration(strict=true).js |   1 +
 ...dRefInTypeDeclaration(strict=true).js.diff |   9 +-
 .../freshLiteralTypesInIntersections.js       |   1 +
 .../freshLiteralTypesInIntersections.js.diff  |  10 -
 ...signabilityWithArrayLike01(strict=true).js |   1 +
 ...bilityWithArrayLike01(strict=true).js.diff |   9 -
 .../functionCallOnConstrainedTypeVariable.js  |   1 +
 ...ctionCallOnConstrainedTypeVariable.js.diff |  10 -
 ...lWithinOwnBodyCastTypeParameterIdentity.js |   1 +
 ...inOwnBodyCastTypeParameterIdentity.js.diff |  10 -
 .../genericFunctionsNotContextSensitive.js    |   1 +
 ...enericFunctionsNotContextSensitive.js.diff |  10 -
 .../genericInferenceDefaultTypeParameter.js   |   1 +
 ...nericInferenceDefaultTypeParameter.js.diff |  10 -
 .../compiler/genericIsNeverEmptyObject.js     |   1 +
 .../genericIsNeverEmptyObject.js.diff         |  10 -
 .../compiler/genericMappedTypeAsClause.js     |   1 +
 .../genericMappedTypeAsClause.js.diff         |  10 -
 .../submodule/compiler/genericRestTypes.js    |   1 +
 .../compiler/genericRestTypes.js.diff         |  10 -
 .../genericUnboundedTypeParamAssignability.js |   1 +
 ...ricUnboundedTypeParamAssignability.js.diff |  10 -
 ...ithNoConstraintComparableWithCurlyCurly.js |   1 +
 ...ConstraintComparableWithCurlyCurly.js.diff |  10 -
 .../compiler/getParameterNameAtPosition.js    |   1 +
 .../getParameterNameAtPosition.js.diff        |   9 -
 ...phicMappedTypeIntersectionAssignability.js |   1 +
 ...appedTypeIntersectionAssignability.js.diff |  10 -
 .../compiler/identityRelationNeverTypes.js    |   1 +
 .../identityRelationNeverTypes.js.diff        |  10 -
 .../compiler/inKeywordAndIntersection.js      |   1 +
 .../compiler/inKeywordAndIntersection.js.diff |   6 +-
 .../submodule/compiler/inKeywordAndUnknown.js |   1 +
 .../compiler/inKeywordAndUnknown.js.diff      |  10 -
 .../inKeywordTypeguard(strict=true).js        |   1 +
 .../inKeywordTypeguard(strict=true).js.diff   |   8 +-
 .../compiler/incrementOnNullAssertion.js      |   1 +
 .../compiler/incrementOnNullAssertion.js.diff |  10 -
 .../compiler/indexSignatureAndMappedType.js   |   1 +
 .../indexSignatureAndMappedType.js.diff       |  10 -
 .../indexTypeNoSubstitutionTemplateLiteral.js |   1 +
 ...xTypeNoSubstitutionTemplateLiteral.js.diff |   9 -
 .../compiler/indexedAccessNormalization.js    |   1 +
 .../indexedAccessNormalization.js.diff        |  10 -
 .../indexedAccessWithFreshObjectLiteral.js    |   1 +
 ...ndexedAccessWithFreshObjectLiteral.js.diff |  10 -
 .../compiler/indexingTypesWithNever.js        |   1 +
 .../compiler/indexingTypesWithNever.js.diff   |  10 -
 .../compiler/inferRestArgumentsMappedTuple.js |   1 +
 .../inferRestArgumentsMappedTuple.js.diff     |   9 -
 .../compiler/inferTypeParameterConstraints.js |   1 +
 .../inferTypeParameterConstraints.js.diff     |  10 +-
 .../inferenceDoesNotAddUndefinedOrNull.js     |   1 +
 ...inferenceDoesNotAddUndefinedOrNull.js.diff |  10 -
 .../compiler/inferenceErasedSignatures.js     |   1 +
 .../inferenceErasedSignatures.js.diff         |   6 +-
 .../compiler/inferenceFromIncompleteSource.js |   1 +
 .../inferenceFromIncompleteSource.js.diff     |   9 -
 ...enceOfNullableObjectTypesWithCommonBase.js |   1 +
 ...fNullableObjectTypesWithCommonBase.js.diff |  10 -
 .../compiler/inferenceOptionalProperties.js   |   1 +
 .../inferenceOptionalProperties.js.diff       |  10 -
 .../inferenceOptionalPropertiesStrict.js      |   1 +
 .../inferenceOptionalPropertiesStrict.js.diff |  10 -
 ...enceOptionalPropertiesToIndexSignatures.js |   1 +
 ...ptionalPropertiesToIndexSignatures.js.diff |  10 -
 .../inferenceShouldFailOnEvolvingArrays.js    |   1 +
 ...nferenceShouldFailOnEvolvingArrays.js.diff |  10 -
 ...renceUnionOfObjectsMappedContextualType.js |   1 +
 ...UnionOfObjectsMappedContextualType.js.diff |  10 -
 .../initializerWithThisPropertyAccess.js      |   1 +
 .../initializerWithThisPropertyAccess.js.diff |   8 +-
 .../compiler/intersectionPropertyCheck.js     |   1 +
 .../intersectionPropertyCheck.js.diff         |  10 -
 .../intersectionSatisfiesConstraint.js        |   1 +
 .../intersectionSatisfiesConstraint.js.diff   |  10 -
 .../intersectionWithConflictingPrivates.js    |   1 +
 ...ntersectionWithConflictingPrivates.js.diff |   8 +-
 .../intersectionsAndOptionalProperties.js     |   1 +
 ...intersectionsAndOptionalProperties.js.diff |  10 -
 .../invariantGenericErrorElaboration.js       |   1 +
 .../invariantGenericErrorElaboration.js.diff  |  10 -
 .../isolatedDeclarationErrorsEnums.js         |   1 +
 .../isolatedDeclarationErrorsEnums.js.diff    |   9 +-
 ...Next(strictbuiltiniteratorreturn=false).js |   1 +
 ...strictbuiltiniteratorreturn=false).js.diff |  10 -
 ...TNext(strictbuiltiniteratorreturn=true).js |   1 +
 ...(strictbuiltiniteratorreturn=true).js.diff |  10 -
 .../submodule/compiler/jsxChildWrongType.js   |   1 +
 .../compiler/jsxChildWrongType.js.diff        |  10 -
 .../compiler/jsxChildrenArrayWrongType.js     |   1 +
 .../jsxChildrenArrayWrongType.js.diff         |  10 -
 .../jsxChildrenGenericContextualTypes.js      |   1 +
 .../jsxChildrenGenericContextualTypes.js.diff |  10 -
 .../compiler/jsxChildrenWrongType.js          |   1 +
 .../compiler/jsxChildrenWrongType.js.diff     |  10 -
 .../compiler/jsxComponentTypeErrors.js        |   1 +
 .../compiler/jsxComponentTypeErrors.js.diff   |  10 +-
 ...sOnlyTriviaWhiteSpacesNotCountedAsChild.js |   1 +
 ...TriviaWhiteSpacesNotCountedAsChild.js.diff |  10 -
 .../compiler/jsxElementClassTooManyParams.js  |   1 +
 .../jsxElementClassTooManyParams.js.diff      |   6 +-
 .../compiler/jsxElementsAsIdentifierNames.js  |   1 +
 .../jsxElementsAsIdentifierNames.js.diff      |  10 -
 .../compiler/jsxFragmentWrongType.js          |   1 +
 .../compiler/jsxFragmentWrongType.js.diff     |  10 -
 .../keyofObjectWithGlobalSymbolIncluded.js    |   1 +
 ...eyofObjectWithGlobalSymbolIncluded.js.diff |  10 -
 ...terWithTupleArgsHasCorrectAssignability.js |   1 +
 ...thTupleArgsHasCorrectAssignability.js.diff |   6 +-
 .../compiler/largeControlFlowGraph.js         |   1 +
 .../compiler/largeControlFlowGraph.js.diff    |  10 -
 .../submodule/compiler/mapConstructor.js      |   1 +
 .../submodule/compiler/mapConstructor.js.diff |  10 -
 .../mappedTypeAndIndexSignatureRelation.js    |   1 +
 ...appedTypeAndIndexSignatureRelation.js.diff |   7 -
 .../mappedTypeContextualTypesApplied.js       |   1 +
 .../mappedTypeContextualTypesApplied.js.diff  |  10 -
 .../mappedTypeGenericIndexedAccess.js         |   1 +
 .../mappedTypeGenericIndexedAccess.js.diff    |   9 +-
 .../compiler/mappedTypeIndexedAccess.js       |   1 +
 .../compiler/mappedTypeIndexedAccess.js.diff  |  10 -
 .../compiler/mixedTypeEnumComparison.js       |   1 +
 .../compiler/mixedTypeEnumComparison.js.diff  |  10 +-
 .../compiler/multipleInferenceContexts.js     |   1 +
 .../multipleInferenceContexts.js.diff         |  10 -
 .../submodule/compiler/narrowByEquality.js    |   1 +
 .../compiler/narrowByEquality.js.diff         |  10 -
 .../submodule/compiler/narrowByInstanceof.js  |   1 +
 .../compiler/narrowByInstanceof.js.diff       |  10 -
 .../compiler/narrowingByTypeofInSwitch.js     |   1 +
 .../narrowingByTypeofInSwitch.js.diff         |  10 -
 .../compiler/narrowingMutualSubtypes.js       |   1 +
 .../compiler/narrowingMutualSubtypes.js.diff  |  10 -
 .../compiler/narrowingOfDottedNames.js        |   1 +
 .../compiler/narrowingOfDottedNames.js.diff   |   9 +-
 .../compiler/narrowingOfQualifiedNames.js     |   1 +
 .../narrowingOfQualifiedNames.js.diff         |  10 -
 .../compiler/narrowingOrderIndependent.js     |   1 +
 .../narrowingOrderIndependent.js.diff         |   7 +-
 .../compiler/narrowingTruthyObject.js         |   1 +
 .../compiler/narrowingTruthyObject.js.diff    |  10 -
 .../compiler/narrowingTypeofDiscriminant.js   |   1 +
 .../narrowingTypeofDiscriminant.js.diff       |  10 -
 .../compiler/narrowingTypeofFunction.js       |   1 +
 .../compiler/narrowingTypeofFunction.js.diff  |  10 -
 .../compiler/narrowingTypeofObject.js         |   1 +
 .../compiler/narrowingTypeofObject.js.diff    |  10 -
 .../compiler/narrowingTypeofUndefined2.js     |   1 +
 .../narrowingTypeofUndefined2.js.diff         |  10 -
 .../narrowingUnionToNeverAssigment.js         |   1 +
 .../narrowingUnionToNeverAssigment.js.diff    |  10 -
 .../compiler/narrowingUnionToUnion.js         |   1 +
 .../compiler/narrowingUnionToUnion.js.diff    |  10 -
 .../nestedCallbackErrorNotFlattened.js        |   1 +
 .../nestedCallbackErrorNotFlattened.js.diff   |   8 -
 .../compiler/nestedExcessPropertyChecking.js  |   1 +
 .../nestedExcessPropertyChecking.js.diff      |  10 -
 .../compiler/nestedGenericSpreadInference.js  |   1 +
 .../nestedGenericSpreadInference.js.diff      |   8 -
 .../compiler/noExcessiveStackDepthError.js    |   1 +
 .../noExcessiveStackDepthError.js.diff        |  10 -
 ...checkedIndexedAccessCompoundAssignments.js |   1 +
 ...edIndexedAccessCompoundAssignments.js.diff |  10 -
 .../compiler/noUnusedLocals_writeOnly.js      |   1 +
 .../compiler/noUnusedLocals_writeOnly.js.diff |  10 -
 .../compiler/nonInferrableTypePropagation1.js |   1 +
 .../nonInferrableTypePropagation1.js.diff     |   9 -
 .../submodule/compiler/nonNullMappedType.js   |   1 +
 .../compiler/nonNullMappedType.js.diff        |  10 -
 ...ameterExtendingStringAssignableToString.js |   1 +
 ...rExtendingStringAssignableToString.js.diff |  10 -
 .../compiler/nonNullReferenceMatching.js      |   1 +
 .../compiler/nonNullReferenceMatching.js.diff |   6 +-
 ...ableAndObjectIntersections(strict=true).js |   1 +
 ...ndObjectIntersections(strict=true).js.diff |   8 -
 .../compiler/nonNullableReduction.js          |   1 +
 .../compiler/nonNullableReduction.js.diff     |  10 -
 .../submodule/compiler/nonNullableTypes1.js   |   1 +
 .../compiler/nonNullableTypes1.js.diff        |  10 +-
 ...onnullAssertionPropegatesContextualType.js |   1 +
 ...lAssertionPropegatesContextualType.js.diff |   8 -
 .../normalizedIntersectionTooComplex.js       |   1 +
 .../normalizedIntersectionTooComplex.js.diff  |  10 -
 .../compiler/numericEnumMappedType.js         |   1 +
 .../compiler/numericEnumMappedType.js.diff    |  10 +-
 .../compiler/observableInferenceCanBeMade.js  |   1 +
 .../observableInferenceCanBeMade.js.diff      |  10 -
 .../compiler/omitTypeHelperModifiers01.js     |   1 +
 .../omitTypeHelperModifiers01.js.diff         |  10 -
 .../compiler/omittedExpressionForOfLoop.js    |   1 +
 .../omittedExpressionForOfLoop.js.diff        |  10 -
 .../optionalTupleElementsAndUndefined.js      |   1 +
 .../optionalTupleElementsAndUndefined.js.diff |  10 -
 ...tionsStrictPropertyInitializationStrict.js |   1 +
 ...StrictPropertyInitializationStrict.js.diff |   8 -
 ...ConstructorFixesInferencesAppropriately.js |   1 +
 ...ructorFixesInferencesAppropriately.js.diff |  10 -
 .../overrideBaseIntersectionMethod.js         |   1 +
 .../overrideBaseIntersectionMethod.js.diff    |  10 +-
 ...meterPropertyInConstructorWithPrologues.js |  19 +-
 ...PropertyInConstructorWithPrologues.js.diff |  50 +-
 .../compiler/parseInvalidNonNullableTypes.js  |   1 +
 .../parseInvalidNonNullableTypes.js.diff      |  10 -
 .../compiler/parseInvalidNullableTypes.js     |   1 +
 .../parseInvalidNullableTypes.js.diff         |  10 -
 .../partialOfLargeAPIIsAbleToBeWorkedWith.js  |   1 +
 ...tialOfLargeAPIIsAbleToBeWorkedWith.js.diff |  10 -
 .../partialTypeNarrowedToByTypeGuard.js       |   1 +
 .../partialTypeNarrowedToByTypeGuard.js.diff  |  10 -
 .../potentiallyUnassignedVariableInCatch.js   |   1 +
 ...tentiallyUnassignedVariableInCatch.js.diff |  10 -
 .../compiler/primitiveUnionDetection.js       |   1 +
 .../compiler/primitiveUnionDetection.js.diff  |   9 -
 .../compiler/privatePropertyInUnion.js        |   1 +
 .../compiler/privatePropertyInUnion.js.diff   |   7 +-
 .../compiler/propagateNonInferrableType.js    |   1 +
 .../propagateNonInferrableType.js.diff        |   8 -
 .../protectedAccessThroughContextualThis.js   |   1 +
 ...otectedAccessThroughContextualThis.js.diff |   6 +-
 .../compiler/ramdaToolsNoInfinite2.js         |   1 +
 .../compiler/ramdaToolsNoInfinite2.js.diff    |   7 -
 ...yFloat32ArrayAssignableWithFloat32Array.js |   1 +
 ...t32ArrayAssignableWithFloat32Array.js.diff |  10 -
 .../compiler/recursiveClassBaseType.js        |   1 +
 .../compiler/recursiveClassBaseType.js.diff   |  10 -
 .../compiler/recursiveConditionalTypes.js     |   1 +
 .../recursiveConditionalTypes.js.diff         |  10 -
 .../compiler/recursiveExcessPropertyChecks.js |   1 +
 .../recursiveExcessPropertyChecks.js.diff     |  10 -
 .../compiler/recursiveReverseMappedType.js    |   1 +
 .../recursiveReverseMappedType.js.diff        |  10 -
 .../relatedViaDiscriminatedTypeNoError2.js    |   1 +
 ...elatedViaDiscriminatedTypeNoError2.js.diff |   9 -
 .../compiler/restElementAssignable.js         |   1 +
 .../compiler/restElementAssignable.js.diff    |  10 -
 .../restParameterTypeInstantiation.js         |   1 +
 .../restParameterTypeInstantiation.js.diff    |  10 -
 .../submodule/compiler/restUnion3.js          |   1 +
 .../submodule/compiler/restUnion3.js.diff     |  10 -
 .../reverseMappedContravariantInference.js    |   1 +
 ...everseMappedContravariantInference.js.diff |   9 -
 ...reverseMappedTypeIntersectionConstraint.js |   1 +
 ...seMappedTypeIntersectionConstraint.js.diff |  10 -
 .../reverseMappedTypeRecursiveInference.js    |   1 +
 ...everseMappedTypeRecursiveInference.js.diff |  10 -
 .../compiler/selfReferentialFunctionType.js   |   1 +
 .../selfReferentialFunctionType.js.diff       |  10 -
 ...reInstantiationWithRecursiveConstraints.js |   1 +
 ...tantiationWithRecursiveConstraints.js.diff |  10 -
 .../compiler/silentNeverPropagation.js        |   1 +
 .../compiler/silentNeverPropagation.js.diff   |  10 -
 .../compiler/simpleRecursionWithBaseCase1.js  |   1 +
 .../simpleRecursionWithBaseCase1.js.diff      |  10 -
 ...itionalWithInteriorConditionalIsRelated.js |   1 +
 ...alWithInteriorConditionalIsRelated.js.diff |  10 -
 .../submodule/compiler/sourceMapSample.js     |   1 -
 .../compiler/sourceMapSample.js.diff          |   1 -
 .../submodule/compiler/sourceMapSample.js.map |   4 +-
 .../compiler/sourceMapSample.js.map.diff      |   4 +-
 .../compiler/sourceMapSample.sourcemap.txt    | 396 ++++++++--------
 .../sourceMapSample.sourcemap.txt.diff        | 414 ++++++++---------
 .../compiler/sourceMapValidationClasses.js    |   1 -
 .../sourceMapValidationClasses.js.diff        |   1 -
 .../sourceMapValidationClasses.js.map         |   4 +-
 .../sourceMapValidationClasses.js.map.diff    |   4 +-
 .../sourceMapValidationClasses.sourcemap.txt  | 408 ++++++++---------
 ...rceMapValidationClasses.sourcemap.txt.diff | 426 +++++++++---------
 .../specialIntersectionsInMappedTypes.js      |   1 +
 .../specialIntersectionsInMappedTypes.js.diff |  10 -
 .../spreadExpressionContextualType.js         |   1 +
 .../spreadExpressionContextualType.js.diff    |  10 -
 .../compiler/spreadIdenticalTypesRemoved.js   |   1 +
 .../spreadIdenticalTypesRemoved.js.diff       |  10 -
 ...tions(exactoptionalpropertytypes=false).js |   1 +
 ...(exactoptionalpropertytypes=false).js.diff |  10 -
 ...ations(exactoptionalpropertytypes=true).js |   1 +
 ...s(exactoptionalpropertytypes=true).js.diff |  10 -
 ...ithIndexDoesNotAddUndefinedToLocalIndex.js |   1 +
 ...dexDoesNotAddUndefinedToLocalIndex.js.diff |   8 -
 ...ObjectLiteralAssignableToIndexSignature.js |   1 +
 ...tLiteralAssignableToIndexSignature.js.diff |  10 -
 .../strictBooleanMemberAssignability.js       |   1 +
 .../strictBooleanMemberAssignability.js.diff  |   6 +-
 .../compiler/strictFunctionTypes1.js          |   1 +
 .../compiler/strictFunctionTypes1.js.diff     |  10 -
 .../compiler/strictModeInConstructor.js       |   2 -
 .../compiler/strictModeInConstructor.js.diff  |   2 -
 .../compiler/strictModeReservedWord.js        |   1 -
 .../compiler/strictModeReservedWord.js.diff   |  10 -
 ...odeReservedWordInImportEqualDeclaration.js |   1 -
 ...servedWordInImportEqualDeclaration.js.diff |   7 -
 .../compiler/strictOptionalProperties1.js     |   1 +
 .../strictOptionalProperties1.js.diff         |  10 -
 .../compiler/strictOptionalProperties2.js     |   1 +
 .../strictOptionalProperties2.js.diff         |   9 -
 .../compiler/strictSubtypeAndNarrowing.js     |   1 +
 .../strictSubtypeAndNarrowing.js.diff         |  10 -
 .../compiler/strictTypeofUnionNarrowing.js    |   1 +
 .../strictTypeofUnionNarrowing.js.diff        |  10 -
 .../compiler/stringMappingAssignability.js    |   1 +
 .../stringMappingAssignability.js.diff        |   9 -
 .../compiler/subclassThisTypeAssignable02.js  |   2 +
 .../subclassThisTypeAssignable02.js.diff      |  15 -
 .../substitutionTypePassedToExtends.js        |   1 +
 .../substitutionTypePassedToExtends.js.diff   |   7 -
 ...sCompareCorrectlyInRestrictiveInstances.js |   1 +
 ...areCorrectlyInRestrictiveInstances.js.diff |   7 -
 .../substitutionTypesInIndexedAccessTypes.js  |   1 +
 ...stitutionTypesInIndexedAccessTypes.js.diff |  10 -
 .../compiler/taggedPrimitiveNarrowing.js      |   1 +
 .../compiler/taggedPrimitiveNarrowing.js.diff |  10 -
 .../compiler/tailRecursiveConditionalTypes.js |   1 +
 .../tailRecursiveConditionalTypes.js.diff     |  10 -
 .../compiler/templateLiteralIntersection4.js  |   1 +
 .../templateLiteralIntersection4.js.diff      |  10 -
 .../compiler/templateLiteralsInTypes.js       |   1 +
 .../compiler/templateLiteralsInTypes.js.diff  |   8 +-
 ...ditionalOnMethodReturnOfGenericInstance.js |   1 +
 ...nalOnMethodReturnOfGenericInstance.js.diff |   8 +-
 ...sIndexOnExistingReadonlyFieldIsNotNever.js |   1 +
 ...xOnExistingReadonlyFieldIsNotNever.js.diff |   6 +-
 .../compiler/thisPredicateInObjectLiteral.js  |   1 +
 .../thisPredicateInObjectLiteral.js.diff      |  10 -
 .../compiler/thisShadowingErrorSpans.js       |   1 +
 .../compiler/thisShadowingErrorSpans.js.diff  |  10 -
 .../compiler/tryCatchFinallyControlFlow.js    |   1 +
 .../tryCatchFinallyControlFlow.js.diff        |  10 -
 .../tsxAttributesHasInferrableIndex.js        |   1 +
 .../tsxAttributesHasInferrableIndex.js.diff   |  10 -
 .../submodule/compiler/tupleTypeInference2.js |   1 +
 .../compiler/tupleTypeInference2.js.diff      |  10 -
 ...rdNarrowsIndexedAccessOfKnownProperty10.js |   1 +
 ...rowsIndexedAccessOfKnownProperty10.js.diff |  10 -
 ...rdNarrowsIndexedAccessOfKnownProperty11.js |   1 +
 ...rowsIndexedAccessOfKnownProperty11.js.diff |  10 -
 ...rdNarrowsIndexedAccessOfKnownProperty12.js |   1 +
 ...rowsIndexedAccessOfKnownProperty12.js.diff |  10 -
 ...ardNarrowsIndexedAccessOfKnownProperty2.js |   1 +
 ...rrowsIndexedAccessOfKnownProperty2.js.diff |  10 -
 ...ardNarrowsIndexedAccessOfKnownProperty3.js |   1 +
 ...rrowsIndexedAccessOfKnownProperty3.js.diff |  10 -
 ...ardNarrowsIndexedAccessOfKnownProperty4.js |   1 +
 ...rrowsIndexedAccessOfKnownProperty4.js.diff |   6 +-
 ...ardNarrowsIndexedAccessOfKnownProperty5.js |   1 +
 ...rrowsIndexedAccessOfKnownProperty5.js.diff |  10 -
 ...ardNarrowsIndexedAccessOfKnownProperty6.js |   1 +
 ...rrowsIndexedAccessOfKnownProperty6.js.diff |  10 -
 ...ardNarrowsIndexedAccessOfKnownProperty9.js |   1 +
 ...rrowsIndexedAccessOfKnownProperty9.js.diff |  10 -
 .../typeInferenceCacheInvalidation.js         |   1 +
 .../typeInferenceCacheInvalidation.js.diff    |  10 -
 ...InterfaceDeclarationsInBlockStatements1.js |   1 +
 ...faceDeclarationsInBlockStatements1.js.diff |  10 -
 .../submodule/compiler/typeParameterLeak.js   |   1 +
 .../compiler/typeParameterLeak.js.diff        |  10 -
 .../typePredicateTopLevelTypeParameter.js     |   1 +
 ...typePredicateTopLevelTypeParameter.js.diff |  10 -
 .../typePredicatesCanNarrowByDiscriminant.js  |   1 +
 ...ePredicatesCanNarrowByDiscriminant.js.diff |  10 -
 .../typePredicatesOptionalChaining1.js        |   1 +
 .../typePredicatesOptionalChaining1.js.diff   |  10 -
 .../typePredicatesOptionalChaining2.js        |   1 +
 .../typePredicatesOptionalChaining2.js.diff   |  10 -
 .../typePredicatesOptionalChaining3.js        |   1 +
 .../typePredicatesOptionalChaining3.js.diff   |  10 -
 .../compiler/typeVariableTypeGuards.js        |   1 +
 .../compiler/typeVariableTypeGuards.js.diff   |   9 +-
 .../compiler/umdGlobalAugmentationNoCrash.js  |   1 +
 .../umdGlobalAugmentationNoCrash.js.diff      |   9 -
 ...rgedWithGlobalAugmentationIsNotCircular.js |   1 +
 ...ithGlobalAugmentationIsNotCircular.js.diff |   9 -
 ...edAssignableToGenericMappedIntersection.js |   1 +
 ...ignableToGenericMappedIntersection.js.diff |  10 -
 ...unionErrorMessageOnMatchingDiscriminant.js |   1 +
 ...ErrorMessageOnMatchingDiscriminant.js.diff |  10 -
 .../unionExcessPropsWithPartialMember.js      |   1 +
 .../unionExcessPropsWithPartialMember.js.diff |   8 -
 .../submodule/compiler/unionOfClassCalls.js   |   1 +
 .../compiler/unionOfClassCalls.js.diff        |  10 -
 .../compiler/unionOfEnumInference.js          |   1 +
 .../compiler/unionOfEnumInference.js.diff     |  10 -
 .../compiler/unionReductionMutualSubtypes.js  |   1 +
 .../unionReductionMutualSubtypes.js.diff      |  10 -
 .../compiler/unionRelationshipCheckPasses.js  |   1 +
 .../unionRelationshipCheckPasses.js.diff      |   8 -
 .../unionSignaturesWithThisParameter.js       |   1 +
 .../unionSignaturesWithThisParameter.js.diff  |  10 -
 .../compiler/unionSubtypeReductionErrors.js   |   1 +
 .../unionSubtypeReductionErrors.js.diff       |  10 -
 .../unionTypeWithIndexAndMethodSignature.js   |   1 +
 ...ionTypeWithIndexAndMethodSignature.js.diff |  10 -
 .../submodule/compiler/uniqueSymbolJs2.js     |   1 +
 .../compiler/uniqueSymbolJs2.js.diff          |  10 -
 .../compiler/unmatchedParameterPositions.js   |   1 +
 .../unmatchedParameterPositions.js.diff       |  10 -
 ...eDeclarations(preserveconstenums=false).js |   1 +
 ...arations(preserveconstenums=false).js.diff |  10 +-
 ...leDeclarations(preserveconstenums=true).js |   1 +
 ...larations(preserveconstenums=true).js.diff |  10 +-
 .../compiler/varianceAnnotationValidation.js  |   1 +
 .../varianceAnnotationValidation.js.diff      |  10 -
 .../submodule/compiler/varianceMeasurement.js |   1 +
 .../compiler/varianceMeasurement.js.diff      |  10 -
 .../submodule/compiler/voidIsInitialized.js   |   1 +
 .../compiler/voidIsInitialized.js.diff        |  10 -
 .../compiler/voidUndefinedReduction.js        |   1 +
 .../compiler/voidUndefinedReduction.js.diff   |  10 -
 .../compiler/weakTypeAndPrimitiveNarrowing.js |   1 +
 .../weakTypeAndPrimitiveNarrowing.js.diff     |  10 -
 .../abstractPropertyInitializer.js            |   1 +
 .../abstractPropertyInitializer.js.diff       |   9 -
 .../conformance/assertionTypePredicates1.js   |   1 +
 .../assertionTypePredicates1.js.diff          |  10 +-
 .../conformance/asyncUseStrict_es2017.js      |   1 -
 .../conformance/asyncUseStrict_es2017.js.diff |   9 -
 .../conformance/asyncUseStrict_es5.js         |   1 -
 .../conformance/asyncUseStrict_es5.js.diff    |   1 -
 .../conformance/asyncUseStrict_es6.js         |   1 -
 .../conformance/asyncUseStrict_es6.js.diff    |   1 -
 .../conformance/bivariantInferences.js        |   1 +
 .../conformance/bivariantInferences.js.diff   |   9 -
 .../submodule/conformance/callChain.3.js      |   1 +
 .../submodule/conformance/callChain.3.js.diff |  10 -
 .../submodule/conformance/callChain.js        |   1 +
 .../submodule/conformance/callChain.js.diff   |  10 -
 .../conformance/callChainInference.js         |   1 +
 .../conformance/callChainInference.js.diff    |  10 -
 .../callChainWithSuper(target=es2016).js      |   1 +
 .../callChainWithSuper(target=es2016).js.diff |  10 -
 .../callChainWithSuper(target=es2017).js      |   1 +
 .../callChainWithSuper(target=es2017).js.diff |  10 -
 .../callChainWithSuper(target=es2018).js      |   1 +
 .../callChainWithSuper(target=es2018).js.diff |  10 -
 .../callChainWithSuper(target=es2019).js      |   1 +
 .../callChainWithSuper(target=es2019).js.diff |  10 -
 .../callChainWithSuper(target=es2020).js      |   1 +
 .../callChainWithSuper(target=es2020).js.diff |  10 -
 .../callChainWithSuper(target=es2021).js      |   1 +
 .../callChainWithSuper(target=es2021).js.diff |  10 -
 .../callChainWithSuper(target=es2022).js      |   1 +
 .../callChainWithSuper(target=es2022).js.diff |  10 -
 .../callChainWithSuper(target=es2023).js      |   1 +
 .../callChainWithSuper(target=es2023).js.diff |  10 -
 .../callChainWithSuper(target=es2024).js      |   1 +
 .../callChainWithSuper(target=es2024).js.diff |  10 -
 .../callChainWithSuper(target=es5).js         |   1 +
 .../callChainWithSuper(target=es5).js.diff    |  10 -
 .../callChainWithSuper(target=es6).js         |   1 +
 .../callChainWithSuper(target=es6).js.diff    |  10 -
 .../callChainWithSuper(target=esnext).js      |   1 +
 .../callChainWithSuper(target=esnext).js.diff |  10 -
 .../conformance/callWithMissingVoid.js        |   1 +
 .../conformance/callWithMissingVoid.js.diff   |  10 -
 .../submodule/conformance/callWithSpread4.js  |   1 +
 .../conformance/callWithSpread4.js.diff       |  10 -
 .../checkJsxIntersectionElementPropsType.js   |   1 +
 ...eckJsxIntersectionElementPropsType.js.diff |  10 -
 .../conformance/classStaticBlock28.js         |   1 +
 .../conformance/classStaticBlock28.js.diff    |   7 +-
 .../classStaticBlockUseBeforeDef4.js          |   1 +
 .../classStaticBlockUseBeforeDef4.js.diff     |  10 -
 .../classStaticBlockUseBeforeDef5.js          |   1 +
 .../classStaticBlockUseBeforeDef5.js.diff     |  10 -
 .../conformance/conditionalTypes1.js          |   1 +
 .../conformance/conditionalTypes1.js.diff     |  10 +-
 .../conformance/conditionalTypes2.js          |   1 +
 .../conformance/conditionalTypes2.js.diff     |  10 -
 .../conformance/constAssertionOnEnum.js       |   1 +
 .../conformance/constAssertionOnEnum.js.diff  |  10 +-
 .../submodule/conformance/constAssertions.js  |   1 +
 .../conformance/constAssertions.js.diff       |  10 -
 .../submodule/conformance/constructBigint.js  |   1 +
 .../conformance/constructBigint.js.diff       |  10 -
 .../conformance/controlFlowAliasing.js        |   1 +
 .../conformance/controlFlowAliasing.js.diff   |  10 +-
 .../conformance/controlFlowElementAccess2.js  |   1 +
 .../controlFlowElementAccess2.js.diff         |  10 -
 .../conformance/controlFlowNullishCoalesce.js |   1 +
 .../controlFlowNullishCoalesce.js.diff        |  10 -
 .../conformance/controlFlowOptionalChain.js   |   1 +
 .../controlFlowOptionalChain.js.diff          |  10 -
 .../conformance/controlFlowStringIndex.js     |   1 +
 .../controlFlowStringIndex.js.diff            |  10 -
 .../conformance/controlFlowTypeofObject.js    |   1 +
 .../controlFlowTypeofObject.js.diff           |  10 -
 .../conformance/covariantCallbacks.js         |   1 +
 .../conformance/covariantCallbacks.js.diff    |  10 -
 .../definiteAssignmentAssertions.js           |   1 +
 .../definiteAssignmentAssertions.js.diff      |   7 +-
 ...AssignmentAssertionsWithObjectShortHand.js |   1 +
 ...nmentAssertionsWithObjectShortHand.js.diff |  10 -
 .../submodule/conformance/deleteChain.js      |   1 +
 .../submodule/conformance/deleteChain.js.diff |  10 -
 .../dependentDestructuredVariables.js         |   1 +
 .../dependentDestructuredVariables.js.diff    |   7 +-
 ...derivedUninitializedPropertyDeclaration.js |   1 +
 ...edUninitializedPropertyDeclaration.js.diff |   8 +-
 ...turingArrayBindingPatternAndAssignment4.js |   1 +
 ...gArrayBindingPatternAndAssignment4.js.diff |   9 -
 .../destructuringAssignabilityCheck.js        |   1 +
 .../destructuringAssignabilityCheck.js.diff   |  10 -
 .../conformance/destructuringControlFlow.js   |   1 +
 .../destructuringControlFlow.js.diff          |  10 -
 .../destructuringWithLiteralInitializers2.js  |   1 +
 ...tructuringWithLiteralInitializers2.js.diff |  10 -
 .../discriminatedUnionInference.js            |   1 +
 .../discriminatedUnionInference.js.diff       |  10 -
 .../conformance/discriminatedUnionTypes2.js   |   1 +
 .../discriminatedUnionTypes2.js.diff          |  10 -
 .../conformance/discriminatedUnionTypes3.js   |   1 +
 .../discriminatedUnionTypes3.js.diff          |  10 -
 .../conformance/elementAccessChain.3.js       |   1 +
 .../conformance/elementAccessChain.3.js.diff  |  10 +-
 .../conformance/elementAccessChain.js         |   1 +
 .../conformance/elementAccessChain.js.diff    |  10 -
 ...umErrorOnConstantBindingWithInitializer.js |   1 +
 ...orOnConstantBindingWithInitializer.js.diff |   6 +-
 .../conformance/equalityWithEnumTypes.js      |   1 +
 .../conformance/equalityWithEnumTypes.js.diff |  10 -
 ...ullishCoalescingAssignment(strict=true).js |   1 +
 ...hCoalescingAssignment(strict=true).js.diff |  10 -
 ...ecorators-classDeclaration-classSuper.7.js |   1 -
 ...tors-classDeclaration-classSuper.7.js.diff |   3 +-
 .../exhaustiveSwitchStatements1.js            |   1 +
 .../exhaustiveSwitchStatements1.js.diff       |  10 -
 .../conformance/fixSignatureCaching.js        |   1 -
 .../conformance/fixSignatureCaching.js.diff   |  10 -
 ...tionWithUseStrictAndSimpleParameterList.js |  11 -
 ...ithUseStrictAndSimpleParameterList.js.diff |  52 ---
 ...hUseStrictAndSimpleParameterList_es2016.js |  11 -
 ...trictAndSimpleParameterList_es2016.js.diff |  52 ---
 .../generatorReturnContextualType.js          |   1 +
 .../generatorReturnContextualType.js.diff     |  10 -
 ...ReturnTypeIndirectReferenceToGlobalType.js |   1 +
 ...nTypeIndirectReferenceToGlobalType.js.diff |  10 -
 .../conformance/genericContextualTypes1.js    |   1 +
 .../genericContextualTypes1.js.diff           |  10 -
 .../conformance/genericFunctionParameters.js  |   1 +
 .../genericFunctionParameters.js.diff         |  10 +-
 .../conformance/genericObjectRest.js          |   1 +
 .../conformance/genericObjectRest.js.diff     |  10 -
 .../conformance/genericRestArityStrict.js     |   1 +
 .../genericRestArityStrict.js.diff            |  10 -
 .../conformance/genericRestParameters1.js     |   1 +
 .../genericRestParameters1.js.diff            |  10 -
 .../conformance/genericRestParameters2.js     |   1 +
 .../genericRestParameters2.js.diff            |  10 -
 .../conformance/genericRestParameters3.js     |   1 +
 .../genericRestParameters3.js.diff            |  10 -
 .../independentPropertyVariance.js            |   1 +
 .../independentPropertyVariance.js.diff       |   9 -
 .../submodule/conformance/indexSignatures1.js |   1 +
 .../conformance/indexSignatures1.js.diff      |  10 -
 .../conformance/inferFromBindingPattern.js    |   1 +
 .../inferFromBindingPattern.js.diff           |  10 -
 .../submodule/conformance/inferTypes1.js      |   1 +
 .../submodule/conformance/inferTypes1.js.diff |   7 +-
 .../conformance/inferTypesWithExtends1.js     |   1 +
 .../inferTypesWithExtends1.js.diff            |  10 +-
 .../conformance/inferTypesWithExtends2.js     |   1 +
 .../inferTypesWithExtends2.js.diff            |   7 -
 .../instantiationExpressionErrors.js          |   1 +
 .../instantiationExpressionErrors.js.diff     |   7 +-
 .../conformance/instantiationExpressions.js   |   1 +
 .../instantiationExpressions.js.diff          |   7 +-
 .../conformance/intersectionNarrowing.js      |   1 +
 .../conformance/intersectionNarrowing.js.diff |  10 -
 .../intersectionOfUnionNarrowing.js           |   1 +
 .../intersectionOfUnionNarrowing.js.diff      |  10 -
 .../intersectionReductionStrict.js            |   1 +
 .../intersectionReductionStrict.js.diff       |  10 -
 .../conformance/intersectionTypeInference3.js |   1 +
 .../intersectionTypeInference3.js.diff        |  10 -
 .../intersectionWithIndexSignatures.js        |   1 +
 .../intersectionWithIndexSignatures.js.diff   |  10 -
 .../intersectionWithUnionConstraint.js        |   1 +
 .../intersectionWithUnionConstraint.js.diff   |  10 -
 .../conformance/intlNumberFormatES2020.js     |   1 +
 .../intlNumberFormatES2020.js.diff            |  10 -
 .../conformance/intlNumberFormatES2023.js     |   1 +
 .../intlNumberFormatES2023.js.diff            |  10 -
 .../intlNumberFormatES5UseGrouping.js         |   1 +
 .../intlNumberFormatES5UseGrouping.js.diff    |  10 -
 .../conformance/intraExpressionInferences.js  |   1 +
 .../intraExpressionInferences.js.diff         |  10 +-
 .../submodule/conformance/intrinsicKeyword.js |   1 +
 .../conformance/intrinsicKeyword.js.diff      |  10 -
 .../submodule/conformance/intrinsicTypes.js   |   1 +
 .../conformance/intrinsicTypes.js.diff        |  10 -
 .../jsDeclarationsJSDocRedirectedLookups.js   |   1 +
 ...DeclarationsJSDocRedirectedLookups.js.diff |  10 +-
 ...jsDeclarationsOptionalTypeLiteralProps2.js |   1 +
 ...larationsOptionalTypeLiteralProps2.js.diff |  10 +-
 ...clarationsReusesExistingTypeAnnotations.js |   1 +
 ...tionsReusesExistingTypeAnnotations.js.diff |  10 +-
 .../jsdocDisallowedInTypescript.js            |   1 +
 .../jsdocDisallowedInTypescript.js.diff       |   8 +-
 .../jsxParsingError4(strict=true).js          |   1 +
 .../jsxParsingError4(strict=true).js.diff     |   9 -
 .../conformance/keyofIntersection.js          |   1 +
 .../conformance/keyofIntersection.js.diff     |  10 -
 ...dStatementDeclarationListInLoopNoCrash1.js |   1 +
 ...ementDeclarationListInLoopNoCrash1.js.diff |  10 -
 ...dStatementDeclarationListInLoopNoCrash2.js |   1 +
 ...ementDeclarationListInLoopNoCrash2.js.diff |  10 -
 .../literalTypesAndDestructuring.js           |   1 +
 .../literalTypesAndDestructuring.js.diff      |  10 -
 .../logicalAssignment1(target=es2015).js      |   1 +
 .../logicalAssignment1(target=es2015).js.diff |  10 -
 .../logicalAssignment1(target=es2020).js      |   1 +
 .../logicalAssignment1(target=es2020).js.diff |  10 -
 .../logicalAssignment1(target=es2021).js      |   1 +
 .../logicalAssignment1(target=es2021).js.diff |  10 -
 .../logicalAssignment1(target=esnext).js      |   1 +
 .../logicalAssignment1(target=esnext).js.diff |  10 -
 .../logicalAssignment11(target=es2015).js     |   1 +
 ...logicalAssignment11(target=es2015).js.diff |  10 -
 .../logicalAssignment11(target=es2020).js     |   1 +
 ...logicalAssignment11(target=es2020).js.diff |  10 -
 .../logicalAssignment11(target=esnext).js     |   1 +
 ...logicalAssignment11(target=esnext).js.diff |  10 -
 .../logicalAssignment2(target=es2015).js      |   1 +
 .../logicalAssignment2(target=es2015).js.diff |  10 -
 .../logicalAssignment2(target=es2020).js      |   1 +
 .../logicalAssignment2(target=es2020).js.diff |  10 -
 .../logicalAssignment2(target=es2021).js      |   1 +
 .../logicalAssignment2(target=es2021).js.diff |  10 -
 .../logicalAssignment2(target=esnext).js      |   1 +
 .../logicalAssignment2(target=esnext).js.diff |  10 -
 .../logicalAssignment3(target=es2015).js      |   1 +
 .../logicalAssignment3(target=es2015).js.diff |  10 -
 .../logicalAssignment3(target=es2020).js      |   1 +
 .../logicalAssignment3(target=es2020).js.diff |  10 -
 .../logicalAssignment3(target=es2021).js      |   1 +
 .../logicalAssignment3(target=es2021).js.diff |  10 -
 .../logicalAssignment3(target=esnext).js      |   1 +
 .../logicalAssignment3(target=esnext).js.diff |  10 -
 .../logicalAssignment4(target=es2015).js      |   1 +
 .../logicalAssignment4(target=es2015).js.diff |  10 -
 .../logicalAssignment4(target=es2020).js      |   1 +
 .../logicalAssignment4(target=es2020).js.diff |  10 -
 .../logicalAssignment4(target=es2021).js      |   1 +
 .../logicalAssignment4(target=es2021).js.diff |  10 -
 .../logicalAssignment4(target=esnext).js      |   1 +
 .../logicalAssignment4(target=esnext).js.diff |  10 -
 .../logicalAssignment5(target=es2015).js      |   1 +
 .../logicalAssignment5(target=es2015).js.diff |  10 -
 .../logicalAssignment5(target=es2020).js      |   1 +
 .../logicalAssignment5(target=es2020).js.diff |  10 -
 .../logicalAssignment5(target=es2021).js      |   1 +
 .../logicalAssignment5(target=es2021).js.diff |  10 -
 .../logicalAssignment5(target=esnext).js      |   1 +
 .../logicalAssignment5(target=esnext).js.diff |  10 -
 .../logicalAssignment6(target=es2015).js      |   1 +
 .../logicalAssignment6(target=es2015).js.diff |  10 -
 .../logicalAssignment6(target=es2020).js      |   1 +
 .../logicalAssignment6(target=es2020).js.diff |  10 -
 .../logicalAssignment6(target=es2021).js      |   1 +
 .../logicalAssignment6(target=es2021).js.diff |  10 -
 .../logicalAssignment6(target=esnext).js      |   1 +
 .../logicalAssignment6(target=esnext).js.diff |  10 -
 .../logicalAssignment7(target=es2015).js      |   1 +
 .../logicalAssignment7(target=es2015).js.diff |  10 -
 .../logicalAssignment7(target=es2020).js      |   1 +
 .../logicalAssignment7(target=es2020).js.diff |  10 -
 .../logicalAssignment7(target=es2021).js      |   1 +
 .../logicalAssignment7(target=es2021).js.diff |  10 -
 .../logicalAssignment7(target=esnext).js      |   1 +
 .../logicalAssignment7(target=esnext).js.diff |  10 -
 .../logicalAssignment8(target=es2015).js      |   1 +
 .../logicalAssignment8(target=es2015).js.diff |  10 -
 .../logicalAssignment8(target=es2020).js      |   1 +
 .../logicalAssignment8(target=es2020).js.diff |  10 -
 .../logicalAssignment8(target=es2021).js      |   1 +
 .../logicalAssignment8(target=es2021).js.diff |  10 -
 .../logicalAssignment8(target=esnext).js      |   1 +
 .../logicalAssignment8(target=esnext).js.diff |  10 -
 .../conformance/logicalAssignment9.js         |   1 +
 .../conformance/logicalAssignment9.js.diff    |  10 -
 .../conformance/mappedTypeAsClauses.js        |   1 +
 .../conformance/mappedTypeAsClauses.js.diff   |  10 -
 .../conformance/mappedTypeConstraints.js      |   1 +
 .../conformance/mappedTypeConstraints.js.diff |  10 -
 .../conformance/mappedTypeConstraints2.js     |   1 +
 .../mappedTypeConstraints2.js.diff            |  10 -
 .../conformance/mappedTypeInferenceErrors.js  |   1 +
 .../mappedTypeInferenceErrors.js.diff         |  10 -
 .../conformance/mappedTypeWithAny.js          |   1 +
 .../conformance/mappedTypeWithAny.js.diff     |  10 -
 .../submodule/conformance/mappedTypes5.js     |   1 +
 .../conformance/mappedTypes5.js.diff          |  10 -
 .../submodule/conformance/mappedTypes6.js     |   1 +
 .../conformance/mappedTypes6.js.diff          |  10 -
 .../conformance/mappedTypesArraysTuples.js    |   1 +
 .../mappedTypesArraysTuples.js.diff           |  10 -
 .../submodule/conformance/mixinAccessors1.js  |   1 +
 .../conformance/mixinAccessors1.js.diff       |  10 -
 .../submodule/conformance/mixinAccessors2.js  |   1 +
 .../conformance/mixinAccessors2.js.diff       |  10 -
 .../submodule/conformance/mixinAccessors3.js  |   1 +
 .../conformance/mixinAccessors3.js.diff       |  10 -
 .../submodule/conformance/mixinAccessors4.js  |   1 +
 .../conformance/mixinAccessors4.js.diff       |  10 -
 .../submodule/conformance/mixinAccessors5.js  |   1 +
 .../conformance/mixinAccessors5.js.diff       |   9 -
 .../narrowingConstrainedTypeVariable.js       |   1 +
 .../narrowingConstrainedTypeVariable.js.diff  |  10 +-
 .../submodule/conformance/neverInference.js   |   1 +
 .../conformance/neverInference.js.diff        |  10 -
 .../conformance/neverUnionIntersection.js     |   1 +
 .../neverUnionIntersection.js.diff            |   7 -
 .../conformance/newTargetNarrowing.js         |   1 +
 .../conformance/newTargetNarrowing.js.diff    |  10 -
 .../submodule/conformance/noInfer.js          |   1 +
 .../submodule/conformance/noInfer.js.diff     |  10 +-
 .../conformance/noUncheckedIndexedAccess.js   |   1 +
 .../noUncheckedIndexedAccess.js.diff          |  10 -
 .../noUncheckedIndexedAccessDestructuring.js  |   1 +
 ...ncheckedIndexedAccessDestructuring.js.diff |  10 -
 .../nonPrimitiveAndTypeVariables.js           |   1 +
 .../nonPrimitiveAndTypeVariables.js.diff      |  10 -
 ...nonPrimitiveConstraintOfIndexAccessType.js |   1 +
 ...imitiveConstraintOfIndexAccessType.js.diff |  10 -
 ...lescingAssignmentVsPrivateFieldsJsEmit1.js |   1 +
 ...ngAssignmentVsPrivateFieldsJsEmit1.js.diff |   6 +-
 .../conformance/nullishCoalescingOperator1.js |   1 +
 .../nullishCoalescingOperator1.js.diff        |  10 -
 .../nullishCoalescingOperator10.js            |   1 +
 .../nullishCoalescingOperator10.js.diff       |   9 -
 .../nullishCoalescingOperator11.js            |   1 +
 .../nullishCoalescingOperator11.js.diff       |   8 -
 .../nullishCoalescingOperator12.js            |   1 +
 .../nullishCoalescingOperator12.js.diff       |  10 -
 .../conformance/nullishCoalescingOperator2.js |   1 +
 .../nullishCoalescingOperator2.js.diff        |  10 -
 .../conformance/nullishCoalescingOperator3.js |   1 +
 .../nullishCoalescingOperator3.js.diff        |   9 -
 .../conformance/nullishCoalescingOperator4.js |   1 +
 .../nullishCoalescingOperator4.js.diff        |   9 -
 .../conformance/nullishCoalescingOperator5.js |   1 +
 .../nullishCoalescingOperator5.js.diff        |  10 -
 .../conformance/nullishCoalescingOperator6.js |   1 +
 .../nullishCoalescingOperator6.js.diff        |   8 -
 .../conformance/nullishCoalescingOperator7.js |   1 +
 .../nullishCoalescingOperator7.js.diff        |  10 -
 .../conformance/nullishCoalescingOperator8.js |   1 +
 .../nullishCoalescingOperator8.js.diff        |  10 -
 .../conformance/nullishCoalescingOperator9.js |   1 +
 .../nullishCoalescingOperator9.js.diff        |   9 -
 .../nullishCoalescingOperator_es2020.js       |   1 +
 .../nullishCoalescingOperator_es2020.js.diff  |  10 -
 .../conformance/numericStringLiteralTypes.js  |   1 +
 .../numericStringLiteralTypes.js.diff         |  10 -
 .../conformance/objectLiteralNormalization.js |   1 +
 .../objectLiteralNormalization.js.diff        |  10 +-
 .../conformance/objectSpreadIndexSignature.js |   1 +
 .../objectSpreadIndexSignature.js.diff        |  10 -
 .../objectSpreadRepeatedComplexity.js         |   1 +
 .../objectSpreadRepeatedComplexity.js.diff    |  10 -
 .../objectSpreadRepeatedNullCheckPerf.js      |   1 +
 .../objectSpreadRepeatedNullCheckPerf.js.diff |  10 -
 .../objectSpreadSetonlyAccessor.js            |   1 +
 .../objectSpreadSetonlyAccessor.js.diff       |   9 -
 ...eWithStringAndNumberIndexSignatureToAny.js |   1 +
 ...StringAndNumberIndexSignatureToAny.js.diff |  10 -
 ...ropertyAssignableToStringIndexSignature.js |   1 +
 ...tyAssignableToStringIndexSignature.js.diff |  10 -
 .../conformance/optionalTupleElements1.js     |   1 +
 .../optionalTupleElements1.js.diff            |  10 -
 .../conformance/partiallyNamedTuples2.js      |   1 +
 .../conformance/partiallyNamedTuples2.js.diff |  10 -
 .../conformance/partiallyNamedTuples3.js      |   1 +
 .../conformance/partiallyNamedTuples3.js.diff |   8 -
 .../conformance/privateIdentifierChain.1.js   |   1 +
 .../privateIdentifierChain.1.js.diff          |   6 +-
 .../conformance/privateNameAccessors.js       |   1 +
 .../conformance/privateNameAccessors.js.diff  |   5 +-
 .../conformance/privateNameAndAny.js          |   1 +
 .../conformance/privateNameAndAny.js.diff     |   5 +-
 .../privateNameAndIndexSignature.js           |   1 +
 .../privateNameAndIndexSignature.js.diff      |   5 +-
 .../privateNameAndObjectRestSpread.js         |   1 +
 .../privateNameAndObjectRestSpread.js.diff    |   7 +-
 .../privateNameCircularReference.js           |   1 +
 .../privateNameCircularReference.js.diff      |   5 +-
 .../conformance/privateNameDuplicateField.js  |   1 +
 .../privateNameDuplicateField.js.diff         |   6 +-
 .../submodule/conformance/privateNameField.js |   1 +
 .../conformance/privateNameField.js.diff      |   5 +-
 ...rivateNameInInExpression(target=es2022).js |   1 +
 ...eNameInInExpression(target=es2022).js.diff |  10 -
 ...rivateNameInInExpression(target=esnext).js |   1 +
 ...eNameInInExpression(target=esnext).js.diff |  10 -
 ...NameInInExpressionUnused(target=es2022).js |   1 +
 ...nInExpressionUnused(target=es2022).js.diff |  10 -
 ...NameInInExpressionUnused(target=esnext).js |   1 +
 ...nInExpressionUnused(target=esnext).js.diff |  10 -
 .../conformance/privateNameMethod.js          |   1 +
 .../conformance/privateNameMethod.js.diff     |   5 +-
 ...teNameNotAccessibleOutsideDefiningClass.js |   1 +
 ...eNotAccessibleOutsideDefiningClass.js.diff |   5 +-
 .../privateNameNotAllowedOutsideClass.js      |   1 +
 .../privateNameNotAllowedOutsideClass.js.diff |   8 -
 .../conformance/privateNameStaticAccessors.js |   1 +
 .../privateNameStaticAccessors.js.diff        |   5 +-
 .../conformance/privateNameStaticMethod.js    |   1 +
 .../privateNameStaticMethod.js.diff           |   5 +-
 ...eStaticsAndStaticMethods(target=es2022).js |   1 +
 ...icsAndStaticMethods(target=es2022).js.diff |  10 -
 ...eStaticsAndStaticMethods(target=esnext).js |   1 +
 ...icsAndStaticMethods(target=esnext).js.diff |  10 -
 ...neForClassFieldsInEsNext(target=es2020).js |   1 +
 ...ClassFieldsInEsNext(target=es2020).js.diff |   5 +-
 ...neForClassFieldsInEsNext(target=esnext).js |   1 +
 ...ClassFieldsInEsNext(target=esnext).js.diff |   9 +-
 .../conformance/privateNamesAndFields.js      |   1 +
 .../conformance/privateNamesAndFields.js.diff |   5 +-
 .../privateNamesAndGenericClasses-2.js        |   1 +
 .../privateNamesAndGenericClasses-2.js.diff   |   5 +-
 .../privateNamesAndIndexedAccess.js           |   1 +
 .../privateNamesAndIndexedAccess.js.diff      |   7 +-
 .../privateNamesAndStaticFields.js            |   1 +
 .../privateNamesAndStaticFields.js.diff       |   5 +-
 ...ateNamesAndStaticMethods(target=es2022).js |   1 +
 ...mesAndStaticMethods(target=es2022).js.diff |  10 -
 ...ateNamesAndStaticMethods(target=esnext).js |   1 +
 ...mesAndStaticMethods(target=esnext).js.diff |  10 -
 .../conformance/privateNamesAndkeyof.js       |   1 +
 .../conformance/privateNamesAndkeyof.js.diff  |   5 +-
 .../privateNamesAssertion(target=es2022).js   |   1 +
 ...ivateNamesAssertion(target=es2022).js.diff |  10 -
 .../privateNamesAssertion(target=esnext).js   |   1 +
 ...ivateNamesAssertion(target=esnext).js.diff |  10 -
 .../privateNamesInGenericClasses.js           |   1 +
 .../privateNamesInGenericClasses.js.diff      |   5 +-
 .../privateNamesInNestedClasses-1.js          |   1 +
 .../privateNamesInNestedClasses-1.js.diff     |   7 +-
 .../privateNamesInNestedClasses-2.js          |   1 +
 .../privateNamesInNestedClasses-2.js.diff     |   5 +-
 .../privateNamesIncompatibleModifiers.js      |   1 +
 .../privateNamesIncompatibleModifiers.js.diff |   5 +-
 .../privateNamesIncompatibleModifiersJs.js    |   1 +
 ...rivateNamesIncompatibleModifiersJs.js.diff |   5 +-
 .../conformance/privateNamesNoDelete.js       |   1 +
 .../conformance/privateNamesNoDelete.js.diff  |   5 +-
 ...teNamesNotAllowedInVariableDeclarations.js |   1 +
 ...esNotAllowedInVariableDeclarations.js.diff |   8 -
 .../conformance/privateNamesUnique-1.js       |   1 +
 .../conformance/privateNamesUnique-1.js.diff  |   5 +-
 .../conformance/privateNamesUnique-5.js       |   1 +
 .../conformance/privateNamesUnique-5.js.diff  |   6 +-
 .../conformance/propertyAccessChain.3.js      |   1 +
 .../conformance/propertyAccessChain.3.js.diff |  10 +-
 .../conformance/propertyAccessChain.js        |   1 +
 .../conformance/propertyAccessChain.js.diff   |  10 -
 .../conformance/propertyAccessWidening.js     |   1 +
 .../propertyAccessWidening.js.diff            |  10 -
 .../conformance/readonlyArraysAndTuples.js    |   1 +
 .../readonlyArraysAndTuples.js.diff           |  10 +-
 .../conformance/readonlyArraysAndTuples2.js   |   1 +
 .../readonlyArraysAndTuples2.js.diff          |   5 +-
 .../conformance/readonlyRestParameters.js     |   1 +
 .../readonlyRestParameters.js.diff            |  10 -
 .../conformance/recursiveTypeReferences1.js   |   1 +
 .../recursiveTypeReferences1.js.diff          |  10 -
 .../conformance/restTupleElements1.js         |   1 +
 .../conformance/restTupleElements1.js.diff    |  10 +-
 .../restTuplesFromContextualTypes.js          |   1 +
 .../restTuplesFromContextualTypes.js.diff     |  10 -
 .../submodule/conformance/spreadDuplicate.js  |   1 +
 .../conformance/spreadDuplicate.js.diff       |  10 -
 .../conformance/spreadDuplicateExact.js       |   1 +
 .../conformance/spreadDuplicateExact.js.diff  |  10 -
 .../conformance/spreadObjectOrFalsy.js        |   1 +
 .../conformance/spreadObjectOrFalsy.js.diff   |  10 +-
 .../spreadOverwritesPropertyStrict.js         |   1 +
 .../spreadOverwritesPropertyStrict.js.diff    |  10 -
 .../conformance/staticIndexSignature3.js      |   1 +
 .../conformance/staticIndexSignature3.js.diff |  10 -
 .../conformance/staticIndexSignature4.js      |   1 +
 .../conformance/staticIndexSignature4.js.diff |  10 -
 .../conformance/staticIndexSignature5.js      |   1 +
 .../conformance/staticIndexSignature5.js.diff |   9 -
 .../conformance/staticIndexSignature6.js      |   1 +
 .../conformance/staticIndexSignature6.js.diff |  10 -
 .../conformance/staticIndexSignature7.js      |   1 +
 .../conformance/staticIndexSignature7.js.diff |   6 +-
 .../conformance/strictBindCallApply1.js       |   1 +
 .../conformance/strictBindCallApply1.js.diff  |  10 -
 .../strictPropertyInitialization.js           |   1 +
 .../strictPropertyInitialization.js.diff      |   8 +-
 .../submodule/conformance/superMethodCall.js  |   1 +
 .../conformance/superMethodCall.js.diff       |   7 +-
 .../switchWithConstrainedTypeVariable.js      |   1 +
 .../switchWithConstrainedTypeVariable.js.diff |  10 -
 .../conformance/templateLiteralTypes2.js      |   1 +
 .../conformance/templateLiteralTypes2.js.diff |  10 -
 .../conformance/templateLiteralTypes3.js      |   1 +
 .../conformance/templateLiteralTypes3.js.diff |  10 -
 .../conformance/templateLiteralTypes4.js      |   1 +
 .../conformance/templateLiteralTypes4.js.diff |  10 -
 .../submodule/conformance/thisMethodCall.js   |   1 +
 .../conformance/thisMethodCall.js.diff        |  10 -
 .../conformance/thisTypeInObjectLiterals2.js  |   1 +
 .../thisTypeInObjectLiterals2.js.diff         |  10 -
 .../tsxLibraryManagedAttributes.js            |   1 +
 .../tsxLibraryManagedAttributes.js.diff       |   8 +-
 .../conformance/tsxSpreadInvalidType.js       |   1 +
 .../conformance/tsxSpreadInvalidType.js.diff  |  10 -
 .../typeFromPropertyAssignment36.js           |   1 +
 .../typeFromPropertyAssignment36.js.diff      |  10 -
 .../typeParameterConstModifiers.js            |   1 +
 .../typeParameterConstModifiers.js.diff       |  10 -
 .../typeSatisfaction_contextualTyping2.js     |   1 +
 ...typeSatisfaction_contextualTyping2.js.diff |  10 -
 .../conformance/typedefOnStatements.js        |   1 +
 .../conformance/typedefOnStatements.js.diff   |  10 +-
 .../submodule/conformance/typedefScope1.js    |   1 +
 .../conformance/typedefScope1.js.diff         |  10 -
 .../submodule/conformance/typeofThis.js       |   1 +
 .../submodule/conformance/typeofThis.js.diff  |   8 +-
 .../conformance/unionTypeReduction2.js        |   1 +
 .../conformance/unionTypeReduction2.js.diff   |  10 -
 .../unionTypeWithIndexSignature.js            |   1 +
 .../unionTypeWithIndexSignature.js.diff       |  10 -
 .../conformance/unionsOfTupleTypes1.js        |   1 +
 .../conformance/unionsOfTupleTypes1.js.diff   |  10 -
 .../conformance/unknownControlFlow.js         |   1 +
 .../conformance/unknownControlFlow.js.diff    |  10 -
 .../submodule/conformance/unknownType1.js     |   1 +
 .../conformance/unknownType1.js.diff          |  10 +-
 .../submodule/conformance/unknownType2.js     |   1 +
 .../conformance/unknownType2.js.diff          |  10 -
 .../submodule/conformance/variadicTuples1.js  |   1 +
 .../conformance/variadicTuples1.js.diff       |  10 +-
 .../submodule/conformance/variadicTuples2.js  |   1 +
 .../conformance/variadicTuples2.js.diff       |  10 -
 .../submodule/conformance/variance.js         |   1 +
 .../submodule/conformance/variance.js.diff    |  10 +-
 .../conformance/varianceAnnotations.js        |   1 +
 .../conformance/varianceAnnotations.js.diff   |  10 +-
 ...nnotationsWithCircularlyReferencesError.js |   1 +
 ...tionsWithCircularlyReferencesError.js.diff |  10 -
 .../voidParamAssignmentCompatibility.js       |   1 +
 .../voidParamAssignmentCompatibility.js.diff  |   9 -
 .../wrappedAndRecursiveConstraints3.js        |   1 -
 .../wrappedAndRecursiveConstraints3.js.diff   |   9 -
 .../wrappedAndRecursiveConstraints4.js        |   1 -
 .../wrappedAndRecursiveConstraints4.js.diff   |   8 -
 ...iffers-between-projects-for-shared-file.js |   1 +
 ...project-with-extended-config-is-removed.js |   3 +
 .../works-with-extended-source-files.js       |  53 ++-
 .../incremental/serializing-error-chain.js    |   1 +
 1176 files changed, 1620 insertions(+), 6192 deletions(-)
 delete mode 100644 testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/alwaysStrict.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/builtinIterator.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/circularBaseTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/destructuringTuple.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/divergentAccessors1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericRestTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/mapConstructor.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowByEquality.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nonNullMappedType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nonNullableReduction.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/restElementAssignable.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/restUnion3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typeParameterLeak.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/varianceMeasurement.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/voidIsInitialized.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/bivariantInferences.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChain.3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChain.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/callWithSpread4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/conditionalTypes2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/constAssertions.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/constructBigint.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/covariantCallbacks.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/deleteChain.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/elementAccessChain.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/genericObjectRest.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/genericRestParameters1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/genericRestParameters2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/genericRestParameters3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/indexSignatures1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/intrinsicTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/keyofIntersection.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/logicalAssignment9.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypes5.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypes6.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mixinAccessors1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mixinAccessors2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mixinAccessors3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mixinAccessors4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/mixinAccessors5.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/neverInference.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/propertyAccessChain.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/spreadDuplicate.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/thisMethodCall.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/typedefScope1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/unknownControlFlow.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/unknownType2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/variadicTuples2.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js.diff
 delete mode 100644 testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js.diff

diff --git a/testdata/baselines/reference/compiler/jsxNestedIndentation.js b/testdata/baselines/reference/compiler/jsxNestedIndentation.js
index 24315ed9a2..05db37de72 100644
--- a/testdata/baselines/reference/compiler/jsxNestedIndentation.js
+++ b/testdata/baselines/reference/compiler/jsxNestedIndentation.js
@@ -13,6 +13,7 @@ function Test() {
 
 
 //// [jsxNestedIndentation.js]
+"use strict";
 function Test() {
     return React.createElement(Child, null,
         React.createElement(Child, null,
diff --git a/testdata/baselines/reference/conformance/deepElementAccessExpressionInJS.js b/testdata/baselines/reference/conformance/deepElementAccessExpressionInJS.js
index 74a48be03c..a38d407c96 100644
--- a/testdata/baselines/reference/conformance/deepElementAccessExpressionInJS.js
+++ b/testdata/baselines/reference/conformance/deepElementAccessExpressionInJS.js
@@ -16,6 +16,7 @@ function calculatePropertyName(index) {
 
 
 //// [elementAccessExpressionInJS.js]
+"use strict";
 if (module[calculatePropertyName(1)]) {
 }
 function calculatePropertyName(index) {
diff --git a/testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js b/testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js
index 5b984c8e15..9af7284f07 100644
--- a/testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js
+++ b/testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js
@@ -11,7 +11,6 @@ function foo() {
 //// [abstractIdentifierNameStrict.js]
 var abstract = true;
 function foo() {
-    "use strict";
     "use strict";
     var abstract = true;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js.diff b/testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js.diff
deleted file mode 100644
index e00add3eff..0000000000
--- a/testdata/baselines/reference/submodule/compiler/abstractIdentifierNameStrict.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.abstractIdentifierNameStrict.js
-+++ new.abstractIdentifierNameStrict.js
-@@= skipped -11, +11 lines =@@
- var abstract = true;
- function foo() {
-     "use strict";
-+    "use strict";
-     var abstract = true;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js b/testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js
index 17d93eeb21..8c0911a932 100644
--- a/testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js
+++ b/testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js
@@ -22,6 +22,7 @@ f.register(s, null);
 f.unregister(s);
 
 //// [acceptSymbolAsWeakType.js]
+"use strict";
 const s = Symbol('s');
 const ws = new WeakSet([s]);
 ws.add(s);
diff --git a/testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js.diff b/testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js.diff
deleted file mode 100644
index 8ab51120fd..0000000000
--- a/testdata/baselines/reference/submodule/compiler/acceptSymbolAsWeakType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.acceptSymbolAsWeakType.js
-+++ new.acceptSymbolAsWeakType.js
-@@= skipped -21, +21 lines =@@
- f.unregister(s);
-
- //// [acceptSymbolAsWeakType.js]
--"use strict";
- const s = Symbol('s');
- const ws = new WeakSet([s]);
- ws.add(s);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js b/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js
index c0459a91af..4164d719ef 100644
--- a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js
+++ b/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js
@@ -14,6 +14,7 @@ e as ErrAlias<string>;
 
 
 //// [aliasInstantiationExpressionGenericIntersectionNoCrash1.js]
+"use strict";
 class ErrImpl {
     e;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js.diff b/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js.diff
index 99893034bd..b2d839a00c 100644
--- a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash1.js.diff
@@ -1,10 +1,8 @@
 --- old.aliasInstantiationExpressionGenericIntersectionNoCrash1.js
 +++ new.aliasInstantiationExpressionGenericIntersectionNoCrash1.js
-@@= skipped -13, +13 lines =@@
-
-
+@@= skipped -15, +15 lines =@@
  //// [aliasInstantiationExpressionGenericIntersectionNoCrash1.js]
--"use strict";
+ "use strict";
  class ErrImpl {
 +    e;
  }
diff --git a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js b/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js
index 4033cf49f7..0755056e2d 100644
--- a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js
+++ b/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js
@@ -19,4 +19,5 @@ wat as Wat<string>;
 
 
 //// [aliasInstantiationExpressionGenericIntersectionNoCrash2.js]
+"use strict";
 wat;
diff --git a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js.diff b/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js.diff
deleted file mode 100644
index 27309f73ad..0000000000
--- a/testdata/baselines/reference/submodule/compiler/aliasInstantiationExpressionGenericIntersectionNoCrash2.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.aliasInstantiationExpressionGenericIntersectionNoCrash2.js
-+++ new.aliasInstantiationExpressionGenericIntersectionNoCrash2.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [aliasInstantiationExpressionGenericIntersectionNoCrash2.js]
--"use strict";
- wat;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js b/testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js
index 177eee9290..b9243024a9 100644
--- a/testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js
+++ b/testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js
@@ -36,6 +36,7 @@ let check3: test3 = "y";
 
 
 //// [aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js]
+"use strict";
 // the type printback for every `test` below should be "y"
 let check = "y";
 let check1 = "y";
diff --git a/testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js.diff b/testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js.diff
deleted file mode 100644
index bfdda90285..0000000000
--- a/testdata/baselines/reference/submodule/compiler/aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js
-+++ new.aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js
-@@= skipped -35, +35 lines =@@
-
-
- //// [aliasOfGenericFunctionWithRestBehavedSameAsUnaliased.js]
--"use strict";
- // the type printback for every `test` below should be "y"
- let check = "y";
- let check1 = "y";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/alwaysStrict.js b/testdata/baselines/reference/submodule/compiler/alwaysStrict.js
index 900fcecea2..29755b6126 100644
--- a/testdata/baselines/reference/submodule/compiler/alwaysStrict.js
+++ b/testdata/baselines/reference/submodule/compiler/alwaysStrict.js
@@ -6,6 +6,7 @@ function f() {
 }
 
 //// [alwaysStrict.js]
+"use strict";
 function f() {
     var arguments = [];
 }
diff --git a/testdata/baselines/reference/submodule/compiler/alwaysStrict.js.diff b/testdata/baselines/reference/submodule/compiler/alwaysStrict.js.diff
deleted file mode 100644
index bfa0b6b775..0000000000
--- a/testdata/baselines/reference/submodule/compiler/alwaysStrict.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.alwaysStrict.js
-+++ new.alwaysStrict.js
-@@= skipped -5, +5 lines =@@
- }
-
- //// [alwaysStrict.js]
--"use strict";
- function f() {
-     var arguments = [];
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js b/testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js
index cca94a41d1..7afe1bc0f1 100644
--- a/testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js
+++ b/testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js
@@ -6,6 +6,7 @@ function f() {
 }
 
 //// [alwaysStrictES6.js]
+"use strict";
 function f() {
     var arguments = [];
 }
diff --git a/testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js.diff b/testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js.diff
deleted file mode 100644
index d35f8ef4b9..0000000000
--- a/testdata/baselines/reference/submodule/compiler/alwaysStrictES6.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.alwaysStrictES6.js
-+++ new.alwaysStrictES6.js
-@@= skipped -5, +5 lines =@@
- }
-
- //// [alwaysStrictES6.js]
--"use strict";
- function f() {
-     var arguments = [];
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js b/testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js
index 1dd397d5f4..8d1a406d4b 100644
--- a/testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js
+++ b/testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js
@@ -8,6 +8,7 @@ module M {
 }
 
 //// [alwaysStrictModule.js]
+"use strict";
 var M;
 (function (M) {
     function f() {
diff --git a/testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js.diff b/testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js.diff
deleted file mode 100644
index c4983e9e5f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/alwaysStrictModule.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.alwaysStrictModule.js
-+++ new.alwaysStrictModule.js
-@@= skipped -7, +7 lines =@@
- }
-
- //// [alwaysStrictModule.js]
--"use strict";
- var M;
- (function (M) {
-     function f() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js b/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js
index 18aa7cc293..db6898e405 100644
--- a/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js
+++ b/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js
@@ -18,6 +18,7 @@ function foo<T>(arr: T[], depth: number) {
 }
 
 //// [arrayFakeFlatNoCrashInferenceDeclarations.js]
+"use strict";
 function foo(arr, depth) {
     return flat(arr, depth);
 }
diff --git a/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js.diff b/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js.diff
index d84d117d38..c80fd1609f 100644
--- a/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/arrayFakeFlatNoCrashInferenceDeclarations.js.diff
@@ -1,10 +1,6 @@
 --- old.arrayFakeFlatNoCrashInferenceDeclarations.js
 +++ new.arrayFakeFlatNoCrashInferenceDeclarations.js
-@@= skipped -17, +17 lines =@@
- }
-
- //// [arrayFakeFlatNoCrashInferenceDeclarations.js]
--"use strict";
+@@= skipped -21, +21 lines =@@
  function foo(arr, depth) {
      return flat(arr, depth);
  }
diff --git a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js b/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js
index 83acd1af97..2836b5b6c8 100644
--- a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js
+++ b/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js
@@ -6,6 +6,7 @@ function foo<T>(arr: T[], depth: number) {
 }
 
 //// [arrayFlatNoCrashInference.js]
+"use strict";
 function foo(arr, depth) {
     return arr.flat(depth);
 }
diff --git a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js.diff b/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js.diff
deleted file mode 100644
index 6f424abae4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.arrayFlatNoCrashInference.js
-+++ new.arrayFlatNoCrashInference.js
-@@= skipped -5, +5 lines =@@
- }
-
- //// [arrayFlatNoCrashInference.js]
--"use strict";
- function foo(arr, depth) {
-     return arr.flat(depth);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js b/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js
index 01f1a34afc..b5aaeaed99 100644
--- a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js
+++ b/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js
@@ -6,6 +6,7 @@ function foo<T>(arr: T[], depth: number) {
 }
 
 //// [arrayFlatNoCrashInferenceDeclarations.js]
+"use strict";
 function foo(arr, depth) {
     return arr.flat(depth);
 }
diff --git a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js.diff b/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js.diff
deleted file mode 100644
index 89e78ce769..0000000000
--- a/testdata/baselines/reference/submodule/compiler/arrayFlatNoCrashInferenceDeclarations.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.arrayFlatNoCrashInferenceDeclarations.js
-+++ new.arrayFlatNoCrashInferenceDeclarations.js
-@@= skipped -5, +5 lines =@@
- }
-
- //// [arrayFlatNoCrashInferenceDeclarations.js]
--"use strict";
- function foo(arr, depth) {
-     return arr.flat(depth);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js b/testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js
index 2812044f16..4979a83b35 100644
--- a/testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js
+++ b/testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js
@@ -27,6 +27,7 @@ animalOrUndef.canMeow; // since is cat, should not be an error
 
 
 //// [assertionFunctionsCanNarrowByDiscriminant.js]
+"use strict";
 const animal = { type: 'cat', canMeow: true };
 assertEqual(animal.type, 'cat');
 animal.canMeow; // since is cat, should not be an error
diff --git a/testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js.diff b/testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js.diff
deleted file mode 100644
index bed1d3aed5..0000000000
--- a/testdata/baselines/reference/submodule/compiler/assertionFunctionsCanNarrowByDiscriminant.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.assertionFunctionsCanNarrowByDiscriminant.js
-+++ new.assertionFunctionsCanNarrowByDiscriminant.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [assertionFunctionsCanNarrowByDiscriminant.js]
--"use strict";
- const animal = { type: 'cat', canMeow: true };
- assertEqual(animal.type, 'cat');
- animal.canMeow; // since is cat, should not be an error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js b/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js
index d944f22f09..18c161118e 100644
--- a/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js
+++ b/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js
@@ -14,6 +14,7 @@ getValue2<number> = () => 1234;
 
 
 //// [assignmentToInstantiationExpression.js]
+"use strict";
 let obj = {};
 obj.fn = () => 1234;
 let getValue;
diff --git a/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js.diff b/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js.diff
index e110519ee1..b9235ee022 100644
--- a/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/assignmentToInstantiationExpression.js.diff
@@ -1,10 +1,8 @@
 --- old.assignmentToInstantiationExpression.js
 +++ new.assignmentToInstantiationExpression.js
-@@= skipped -13, +13 lines =@@
-
-
+@@= skipped -15, +15 lines =@@
  //// [assignmentToInstantiationExpression.js]
--"use strict";
+ "use strict";
  let obj = {};
 -(obj.fn) = () => 1234;
 +obj.fn = () => 1234;
diff --git a/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js b/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js
index 724662231c..e687c0f612 100644
--- a/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js
+++ b/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js
@@ -35,6 +35,7 @@ const increment2: (
 
 
 //// [asyncFunctionContextuallyTypedReturns.js]
+"use strict";
 f(v => v ? [0] : Promise.reject());
 f(async v => v ? [0] : Promise.reject());
 g(v => v ? "contextuallyTypable" : Promise.reject());
diff --git a/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js.diff b/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js.diff
index 46d0ddd374..de95f84107 100644
--- a/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/asyncFunctionContextuallyTypedReturns.js.diff
@@ -1,10 +1,9 @@
 --- old.asyncFunctionContextuallyTypedReturns.js
 +++ new.asyncFunctionContextuallyTypedReturns.js
-@@= skipped -34, +34 lines =@@
-
+@@= skipped -35, +35 lines =@@
 
  //// [asyncFunctionContextuallyTypedReturns.js]
--"use strict";
+ "use strict";
 -var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
 -    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
 -    return new (P || (P = Promise))(function (resolve, reject) {
diff --git a/testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js b/testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js
index 28fff13203..0b625e5da5 100644
--- a/testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js
+++ b/testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js
@@ -1299,6 +1299,7 @@ const foo = function (this: any) {
 };
 
 //// [binaryArithmeticControlFlowGraphNotTooLarge.js]
+"use strict";
 // Repro from #29926 (expanded 10x for good measure)
 const foo = function () {
     var a, b, c, d, ab, bc, cd, da, blocks = this.blocks;
diff --git a/testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js.diff b/testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js.diff
deleted file mode 100644
index 0f3f03b632..0000000000
--- a/testdata/baselines/reference/submodule/compiler/binaryArithmeticControlFlowGraphNotTooLarge.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.binaryArithmeticControlFlowGraphNotTooLarge.js
-+++ new.binaryArithmeticControlFlowGraphNotTooLarge.js
-@@= skipped -1298, +1298 lines =@@
- };
-
- //// [binaryArithmeticControlFlowGraphNotTooLarge.js]
--"use strict";
- // Repro from #29926 (expanded 10x for good measure)
- const foo = function () {
-     var a, b, c, d, ab, bc, cd, da, blocks = this.blocks;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js b/testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js
index 8758b32496..11519f936a 100644
--- a/testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js
+++ b/testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js
@@ -11,7 +11,6 @@ declare function use(n: number): void;
 
 //// [blockScopedBindingsReassignedInLoop1.js]
 (function () {
-    'use strict';
     'use strict';
     for (let i = 0; i < 9; ++i) {
         (() => use(++i))();
diff --git a/testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js.diff b/testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js.diff
deleted file mode 100644
index 058b92665d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/blockScopedBindingsReassignedInLoop1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.blockScopedBindingsReassignedInLoop1.js
-+++ new.blockScopedBindingsReassignedInLoop1.js
-@@= skipped -11, +11 lines =@@
- //// [blockScopedBindingsReassignedInLoop1.js]
- (function () {
-     'use strict';
-+    'use strict';
-     for (let i = 0; i < 9; ++i) {
-         (() => use(++i))();
-     }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js b/testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js
index 74a0feb9ef..3dccb04149 100644
--- a/testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js
+++ b/testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js
@@ -27,6 +27,7 @@ let attrs2 = { optionalBool: true as true, mandatoryFn: () => { } }
 let Success = () => <Funk {...attrs2} />
 
 //// [booleanLiteralsContextuallyTypedFromUnion.jsx]
+"use strict";
 const isIt = Math.random() > 0.5;
 const c = isIt ? { isIt, text: 'hey' } : { isIt, value: 123 };
 const cc = isIt ? { isIt: isIt, text: 'hey' } : { isIt: isIt, value: 123 };
diff --git a/testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js.diff b/testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js.diff
deleted file mode 100644
index ac480824b4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/booleanLiteralsContextuallyTypedFromUnion.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.booleanLiteralsContextuallyTypedFromUnion.js
-+++ new.booleanLiteralsContextuallyTypedFromUnion.js
-@@= skipped -26, +26 lines =@@
- let Success = () => <Funk {...attrs2} />
-
- //// [booleanLiteralsContextuallyTypedFromUnion.jsx]
--"use strict";
- const isIt = Math.random() > 0.5;
- const c = isIt ? { isIt, text: 'hey' } : { isIt, value: 123 };
- const cc = isIt ? { isIt: isIt, text: 'hey' } : { isIt: isIt, value: 123 };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/builtinIterator.js b/testdata/baselines/reference/submodule/compiler/builtinIterator.js
index 4632864112..a22b5baa67 100644
--- a/testdata/baselines/reference/submodule/compiler/builtinIterator.js
+++ b/testdata/baselines/reference/submodule/compiler/builtinIterator.js
@@ -76,6 +76,7 @@ declare const iter2: IteratorObject<string>;
 const iter3 = iter2.flatMap(() => g1);
 
 //// [builtinIterator.js]
+"use strict";
 const iterator = Iterator.from([0, 1, 2]);
 const mapped = iterator.map(String);
 const filtered = iterator.filter(x => x > 0);
diff --git a/testdata/baselines/reference/submodule/compiler/builtinIterator.js.diff b/testdata/baselines/reference/submodule/compiler/builtinIterator.js.diff
deleted file mode 100644
index beed4020ca..0000000000
--- a/testdata/baselines/reference/submodule/compiler/builtinIterator.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.builtinIterator.js
-+++ new.builtinIterator.js
-@@= skipped -75, +75 lines =@@
- const iter3 = iter2.flatMap(() => g1);
-
- //// [builtinIterator.js]
--"use strict";
- const iterator = Iterator.from([0, 1, 2]);
- const mapped = iterator.map(String);
- const filtered = iterator.filter(x => x > 0);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js b/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js
index a6dfbc5311..92d4504710 100644
--- a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js
+++ b/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js
@@ -19,14 +19,12 @@
 
 //// [capturedLetConstInLoop12.js]
 (function () {
-    "use strict";
     "use strict";
     for (let i = 0; i < 4; i++) {
         (() => [i] = [i + 1])();
     }
 })();
 (function () {
-    "use strict";
     "use strict";
     for (let i = 0; i < 4; i++) {
         (() => ({ a: i } = { a: i + 1 }))();
diff --git a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js.diff b/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js.diff
deleted file mode 100644
index ef038f19f1..0000000000
--- a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop12.js.diff
+++ /dev/null
@@ -1,16 +0,0 @@
---- old.capturedLetConstInLoop12.js
-+++ new.capturedLetConstInLoop12.js
-@@= skipped -19, +19 lines =@@
- //// [capturedLetConstInLoop12.js]
- (function () {
-     "use strict";
-+    "use strict";
-     for (let i = 0; i < 4; i++) {
-         (() => [i] = [i + 1])();
-     }
- })();
- (function () {
-+    "use strict";
-     "use strict";
-     for (let i = 0; i < 4; i++) {
-         (() => ({ a: i } = { a: i + 1 }))();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js b/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js
index ac4b57f6df..58e2471fa9 100644
--- a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js
+++ b/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js
@@ -17,6 +17,7 @@ function foo(x: number) {
 
 
 //// [capturedLetConstInLoop14.js]
+"use strict";
 function use(v) { }
 function foo(x) {
     var v = 1;
diff --git a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js.diff b/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js.diff
deleted file mode 100644
index 049deb24aa..0000000000
--- a/testdata/baselines/reference/submodule/compiler/capturedLetConstInLoop14.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.capturedLetConstInLoop14.js
-+++ new.capturedLetConstInLoop14.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [capturedLetConstInLoop14.js]
--"use strict";
- function use(v) { }
- function foo(x) {
-     var v = 1;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js b/testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js
index 52ee51d25f..5f976ec06b 100644
--- a/testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js
+++ b/testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js
@@ -29,6 +29,7 @@ type T3 = {
 
 
 //// [circularAccessorAnnotations.js]
+"use strict";
 
 
 //// [circularAccessorAnnotations.d.ts]
diff --git a/testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js.diff b/testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js.diff
deleted file mode 100644
index 5026ee20d6..0000000000
--- a/testdata/baselines/reference/submodule/compiler/circularAccessorAnnotations.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.circularAccessorAnnotations.js
-+++ new.circularAccessorAnnotations.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [circularAccessorAnnotations.js]
--"use strict";
-
-
- //// [circularAccessorAnnotations.d.ts]
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/circularBaseTypes.js b/testdata/baselines/reference/submodule/compiler/circularBaseTypes.js
index e0eb73f9c1..189c47ffd3 100644
--- a/testdata/baselines/reference/submodule/compiler/circularBaseTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/circularBaseTypes.js
@@ -20,6 +20,7 @@ interface Y extends X<Y> {
 
 
 //// [circularBaseTypes.js]
+"use strict";
 // Repro from #38098
 ; // Error
 function f(m) {
diff --git a/testdata/baselines/reference/submodule/compiler/circularBaseTypes.js.diff b/testdata/baselines/reference/submodule/compiler/circularBaseTypes.js.diff
deleted file mode 100644
index 91342e2fd8..0000000000
--- a/testdata/baselines/reference/submodule/compiler/circularBaseTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.circularBaseTypes.js
-+++ new.circularBaseTypes.js
-@@= skipped -19, +19 lines =@@
-
-
- //// [circularBaseTypes.js]
--"use strict";
- // Repro from #38098
- ; // Error
- function f(m) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js b/testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js
index 2f81785ed4..125fdbe026 100644
--- a/testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js
+++ b/testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js
@@ -22,6 +22,7 @@ reproduce({
 
 
 //// [circularContextualMappedType.js]
+"use strict";
 reproduce({
     name: () => { return 123; }
 });
diff --git a/testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js.diff b/testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js.diff
deleted file mode 100644
index 57a3aa4aed..0000000000
--- a/testdata/baselines/reference/submodule/compiler/circularContextualMappedType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.circularContextualMappedType.js
-+++ new.circularContextualMappedType.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [circularContextualMappedType.js]
--"use strict";
- reproduce({
-     name: () => { return 123; }
- });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js b/testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js
index 7c94aba465..c410f8bfc1 100644
--- a/testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js
+++ b/testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js
@@ -11,6 +11,7 @@ Object.freeze({
 
 
 //// [circularContextualReturnType.js]
+"use strict";
 // Repro from #17711
 Object.freeze({
     foo() {
diff --git a/testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js.diff b/testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js.diff
deleted file mode 100644
index 3408515fe9..0000000000
--- a/testdata/baselines/reference/submodule/compiler/circularContextualReturnType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.circularContextualReturnType.js
-+++ new.circularContextualReturnType.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [circularContextualReturnType.js]
--"use strict";
- // Repro from #17711
- Object.freeze({
-     foo() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js b/testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js
index 7b9e0a6cbd..60da0b173d 100644
--- a/testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js
+++ b/testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js
@@ -31,6 +31,7 @@ class MyClass2 {
 
 
 //// [classAttributeInferenceTemplate.js]
+"use strict";
 class MyClass {
     property;
     property2;
diff --git a/testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js.diff b/testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js.diff
deleted file mode 100644
index d45b50c6ce..0000000000
--- a/testdata/baselines/reference/submodule/compiler/classAttributeInferenceTemplate.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.classAttributeInferenceTemplate.js
-+++ new.classAttributeInferenceTemplate.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [classAttributeInferenceTemplate.js]
--"use strict";
- class MyClass {
-     property;
-     property2;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js b/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js
index 8b81bb0e4f..2064999854 100644
--- a/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js
+++ b/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js
@@ -8,6 +8,7 @@ class Test {
 
 
 //// [classFieldsBrokenConstructorEmitNoCrash1.js]
+"use strict";
 class Test {
     prop = 42;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js.diff b/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js.diff
index 46608bf469..51f1a32d08 100644
--- a/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/classFieldsBrokenConstructorEmitNoCrash1.js.diff
@@ -1,10 +1,8 @@
 --- old.classFieldsBrokenConstructorEmitNoCrash1.js
 +++ new.classFieldsBrokenConstructorEmitNoCrash1.js
-@@= skipped -7, +7 lines =@@
-
-
+@@= skipped -9, +9 lines =@@
  //// [classFieldsBrokenConstructorEmitNoCrash1.js]
--"use strict";
+ "use strict";
  class Test {
 -    constructor() {
 -        this.prop = 42;
diff --git a/testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js b/testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js
index 29af3e7fd6..20f28ae9b4 100644
--- a/testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js
+++ b/testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js
@@ -12,3 +12,4 @@ interface Settable {
 
 
 //// [classImplementsMethodWIthTupleArgs.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js.diff b/testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js.diff
deleted file mode 100644
index 6b0f2a3b5f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/classImplementsMethodWIthTupleArgs.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.classImplementsMethodWIthTupleArgs.js
-+++ new.classImplementsMethodWIthTupleArgs.js
-@@= skipped -11, +11 lines =@@
-
-
- //// [classImplementsMethodWIthTupleArgs.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js b/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js
index cdd28e152e..b2f86f768c 100644
--- a/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js
+++ b/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js
@@ -41,6 +41,7 @@ const outsideClass: FuncType = function(val) { // compare to errors only on this
 }
 
 //// [classPropertyErrorOnNameOnly.js]
+"use strict";
 // turn on strictNullChecks
 class Example {
     insideClass = function (val) {
diff --git a/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js.diff b/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js.diff
index 6f0ea69d3a..ca9d8eced9 100644
--- a/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/classPropertyErrorOnNameOnly.js.diff
@@ -1,10 +1,7 @@
 --- old.classPropertyErrorOnNameOnly.js
 +++ new.classPropertyErrorOnNameOnly.js
-@@= skipped -40, +40 lines =@@
- }
-
- //// [classPropertyErrorOnNameOnly.js]
--"use strict";
+@@= skipped -43, +43 lines =@@
+ "use strict";
  // turn on strictNullChecks
  class Example {
 -    constructor() {
diff --git a/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js b/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js
index 0495c556ba..80ca698ed6 100644
--- a/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js
+++ b/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js
@@ -18,6 +18,7 @@ A.a
 
 
 //// [classStaticPropertyAccess.js]
+"use strict";
 class A {
     static "\""() { }
     static x = 1;
diff --git a/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js.diff b/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js.diff
index 2497d8fdfb..628c4721f1 100644
--- a/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/classStaticPropertyAccess.js.diff
@@ -1,10 +1,7 @@
 --- old.classStaticPropertyAccess.js
 +++ new.classStaticPropertyAccess.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [classStaticPropertyAccess.js]
--"use strict";
+@@= skipped -20, +20 lines =@@
+ "use strict";
  class A {
      static "\""() { }
 +    static x = 1;
diff --git a/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js b/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js
index 465891970f..8f7f6c5ec3 100644
--- a/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js
+++ b/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js
@@ -17,6 +17,7 @@ class Bar<T> {
 }
 
 //// [classVarianceCircularity.js]
+"use strict";
 // Issue #52813
 function f() {
     const b = new Bar();
diff --git a/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js.diff b/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js.diff
index 5b9f6fa6f1..a49dad8f57 100644
--- a/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/classVarianceCircularity.js.diff
@@ -1,14 +1,6 @@
 --- old.classVarianceCircularity.js
 +++ new.classVarianceCircularity.js
-@@= skipped -16, +16 lines =@@
- }
-
- //// [classVarianceCircularity.js]
--"use strict";
- // Issue #52813
- function f() {
-     const b = new Bar();
-@@= skipped -8, +7 lines =@@
+@@= skipped -24, +24 lines =@@
      console.log(b.Value);
  }
  class Bar {
diff --git a/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js b/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js
index 8d63e1fa56..40da5220fb 100644
--- a/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js
+++ b/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js
@@ -12,6 +12,7 @@ declare function callme(x: Bar<any>): Bar<any>;
 declare function callme(x: object): string;
 
 //// [classVarianceResolveCircularity1.js]
+"use strict";
 // Issue #52813
 class Bar {
     num;
diff --git a/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js.diff b/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js.diff
index 729c5221e5..821429add6 100644
--- a/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/classVarianceResolveCircularity1.js.diff
@@ -1,10 +1,7 @@
 --- old.classVarianceResolveCircularity1.js
 +++ new.classVarianceResolveCircularity1.js
-@@= skipped -11, +11 lines =@@
- declare function callme(x: object): string;
-
- //// [classVarianceResolveCircularity1.js]
--"use strict";
+@@= skipped -14, +14 lines =@@
+ "use strict";
  // Issue #52813
  class Bar {
 -    constructor() {
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js
index 11a05dfa4e..0b9a8f6641 100644
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js
+++ b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js
@@ -38,6 +38,7 @@ call(actionB, printFn);
 
 
 //// [coAndContraVariantInferences.js]
+"use strict";
 foo(a, fab);
 foo(b, fab);
 const actionA = { payload: 'any-string' };
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js.diff b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js.diff
index 1a8c6131e3..8c094847ae 100644
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences.js.diff
@@ -1,14 +1,6 @@
 --- old.coAndContraVariantInferences.js
 +++ new.coAndContraVariantInferences.js
-@@= skipped -37, +37 lines =@@
-
-
- //// [coAndContraVariantInferences.js]
--"use strict";
- foo(a, fab);
- foo(b, fab);
- const actionA = { payload: 'any-string' };
-@@= skipped -35, +34 lines =@@
+@@= skipped -72, +72 lines =@@
  declare const actionA: Action<"ACTION_A", string>;
  declare const actionB: Action<"ACTION_B", boolean>;
  declare function call<TName extends string, TPayload>(action: Action<TName, TPayload>, fn: (action: Action<TName, TPayload>) => any): void;
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js
index 176971245f..8fef332ef4 100644
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js
+++ b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js
@@ -122,6 +122,7 @@ const x = tryCast(types, isNodeArray);  // NodeAray<TypeNode>
 
 
 //// [coAndContraVariantInferences2.js]
+"use strict";
 function f1(a, b) {
     const x1 = cast(a, isC); // cast<A, C>
     const x2 = cast(b, isC); // cast<A, C>
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js.diff b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js.diff
deleted file mode 100644
index a2f51d6248..0000000000
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.coAndContraVariantInferences2.js
-+++ new.coAndContraVariantInferences2.js
-@@= skipped -121, +121 lines =@@
-
-
- //// [coAndContraVariantInferences2.js]
--"use strict";
- function f1(a, b) {
-     const x1 = cast(a, isC); // cast<A, C>
-     const x2 = cast(b, isC); // cast<A, C>
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js
index d80331eb7f..dc92a6d394 100644
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js
+++ b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js
@@ -126,6 +126,7 @@ function foo() {
 
 
 //// [coAndContraVariantInferences3.js]
+"use strict";
 ;
 buildOverload("updateImportDeclaration")
     .overload({
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js.diff b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js.diff
deleted file mode 100644
index 3f9ba1f3a4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.coAndContraVariantInferences3.js
-+++ new.coAndContraVariantInferences3.js
-@@= skipped -125, +125 lines =@@
-
-
- //// [coAndContraVariantInferences3.js]
--"use strict";
- ;
- buildOverload("updateImportDeclaration")
-     .overload({
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js
index 0b872a1384..c7339e1af1 100644
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js
+++ b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js
@@ -27,6 +27,7 @@ function foo() {
 
 
 //// [coAndContraVariantInferences4.js]
+"use strict";
 function foo() {
     every(modifiers, isModifier);
     every(modifiers, isDecorator);
diff --git a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js.diff b/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js.diff
deleted file mode 100644
index 4e7608f607..0000000000
--- a/testdata/baselines/reference/submodule/compiler/coAndContraVariantInferences4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.coAndContraVariantInferences4.js
-+++ new.coAndContraVariantInferences4.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [coAndContraVariantInferences4.js]
--"use strict";
- function foo() {
-     every(modifiers, isModifier);
-     every(modifiers, isDecorator);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js b/testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js
index b614cd40d8..881d98bd71 100644
--- a/testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js
+++ b/testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js
@@ -24,6 +24,7 @@ Func({
 });
 
 //// [complicatedIndexesOfIntersectionsAreInferencable.js]
+"use strict";
 Func({
     initialValues: {
         foo: ""
diff --git a/testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js.diff b/testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js.diff
deleted file mode 100644
index 9ac3616e3a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/complicatedIndexesOfIntersectionsAreInferencable.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.complicatedIndexesOfIntersectionsAreInferencable.js
-+++ new.complicatedIndexesOfIntersectionsAreInferencable.js
-@@= skipped -23, +23 lines =@@
- });
-
- //// [complicatedIndexesOfIntersectionsAreInferencable.js]
--"use strict";
- Func({
-     initialValues: {
-         foo: ""
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js b/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js
index c8afaaee30..5c613f080d 100644
--- a/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js
+++ b/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js
@@ -80,6 +80,7 @@ val2 = MyDeclaredEnum.B;
 
 
 //// [computedEnumTypeWidening.js]
+"use strict";
 var E;
 (function (E) {
     E["A"] = computed(0);
diff --git a/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js.diff b/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js.diff
index 835664175c..c8c9a8d25a 100644
--- a/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/computedEnumTypeWidening.js.diff
@@ -1,10 +1,7 @@
 --- old.computedEnumTypeWidening.js
 +++ new.computedEnumTypeWidening.js
-@@= skipped -79, +79 lines =@@
-
-
- //// [computedEnumTypeWidening.js]
--"use strict";
+@@= skipped -82, +82 lines =@@
+ "use strict";
  var E;
  (function (E) {
 -    E[E["A"] = computed(0)] = "A";
@@ -22,7 +19,7 @@
  })(E || (E = {}));
  function f1() {
      const c1 = E.B; // Fresh E.B
-@@= skipped -51, +54 lines =@@
+@@= skipped -48, +52 lines =@@
  let v1 = E.B;
  let v2 = E.B;
  class C {
diff --git a/testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js b/testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js
index afefa5b297..6c61698aa0 100644
--- a/testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js
+++ b/testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js
@@ -24,6 +24,7 @@ foo[k] = ['foo'];
 
 
 //// [a.js]
+"use strict";
 const k = Symbol();
 foo.k = ['foo'];
 foo['k'] = ['foo'];
diff --git a/testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js.diff b/testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js.diff
deleted file mode 100644
index 4d21258595..0000000000
--- a/testdata/baselines/reference/submodule/compiler/computedPropertiesWithSetterAssignment.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.computedPropertiesWithSetterAssignment.js
-+++ new.computedPropertiesWithSetterAssignment.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [a.js]
--"use strict";
- const k = Symbol();
- foo.k = ['foo'];
- foo['k'] = ['foo'];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js b/testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js
index 970bd0ee51..a28d273b29 100644
--- a/testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js
+++ b/testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js
@@ -18,6 +18,7 @@ good1({ when: value => false });
 good2({ when: value => false });
 
 //// [conditionalTypeContextualTypeSimplificationsSuceeds.js]
+"use strict";
 function bad(attrs) { }
 function good1(attrs) { }
 function good2(attrs) { }
diff --git a/testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js.diff b/testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js.diff
deleted file mode 100644
index 6be09e1a0e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.conditionalTypeContextualTypeSimplificationsSuceeds.js
-+++ new.conditionalTypeContextualTypeSimplificationsSuceeds.js
-@@= skipped -17, +17 lines =@@
- good2({ when: value => false });
-
- //// [conditionalTypeContextualTypeSimplificationsSuceeds.js]
--"use strict";
- function bad(attrs) { }
- function good1(attrs) { }
- function good2(attrs) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js b/testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js
index 658eead44e..4d6889f499 100644
--- a/testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js
+++ b/testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js
@@ -68,6 +68,7 @@ const zee = z!!!; // since x is `any`, `x extends null | undefined` should be bo
 
 
 //// [conditionalTypesSimplifyWhenTrivial.js]
+"use strict";
 const fn1 = (params) => params;
 function fn2(x) {
     var y = x;
diff --git a/testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js.diff b/testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js.diff
deleted file mode 100644
index 6f01d300a4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/conditionalTypesSimplifyWhenTrivial.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.conditionalTypesSimplifyWhenTrivial.js
-+++ new.conditionalTypesSimplifyWhenTrivial.js
-@@= skipped -67, +67 lines =@@
-
-
- //// [conditionalTypesSimplifyWhenTrivial.js]
--"use strict";
- const fn1 = (params) => params;
- function fn2(x) {
-     var y = x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js b/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js
index e5ca06533f..213c85210b 100644
--- a/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js
+++ b/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js
@@ -49,7 +49,6 @@ class B {
     exposedField;
     #privateField;
     constructor(arg, exposedField) {
-        "prologue";
         "prologue";
         this.exposedField = exposedField;
         ({ key: this.#privateField } = arg);
diff --git a/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js.diff b/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js.diff
index cf2a626f16..ba5ab16029 100644
--- a/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/constructorWithParameterPropertiesAndPrivateFields.es2015.js.diff
@@ -39,7 +39,6 @@
      constructor(arg, exposedField) {
          "prologue";
 -        var _a;
-+        "prologue";
          this.exposedField = exposedField;
 -        _B_privateField.set(this, void 0);
 -        (_a = this, { key: ({ set value(_b) { __classPrivateFieldSet(_a, _B_privateField, _b, "f"); } }).value } = arg);
diff --git a/testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js b/testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js
index a791c6ea5c..f85416cd26 100644
--- a/testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js
+++ b/testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js
@@ -29,7 +29,6 @@ class A {
 }
 class B extends A {
     constructor() {
-        "ngInject";
         "ngInject";
         console.log("B");
         super();
diff --git a/testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js.diff b/testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js.diff
deleted file mode 100644
index 68182998cf..0000000000
--- a/testdata/baselines/reference/submodule/compiler/constructorWithSuperAndPrologue.es5.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.constructorWithSuperAndPrologue.es5.js
-+++ new.constructorWithSuperAndPrologue.es5.js
-@@= skipped -29, +29 lines =@@
- class B extends A {
-     constructor() {
-         "ngInject";
-+        "ngInject";
-         console.log("B");
-         super();
-     }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js b/testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js
index 359b24a27d..e32e8fd2ec 100644
--- a/testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js
+++ b/testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js
@@ -60,6 +60,7 @@ test(
 
 
 //// [contextSensitiveReturnTypeInference.js]
+"use strict";
 // Repro from #34849
 const DEPS = {
     foo: 1
diff --git a/testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js.diff b/testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js.diff
deleted file mode 100644
index 440bae3f6c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextSensitiveReturnTypeInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextSensitiveReturnTypeInference.js
-+++ new.contextSensitiveReturnTypeInference.js
-@@= skipped -59, +59 lines =@@
-
-
- //// [contextSensitiveReturnTypeInference.js]
--"use strict";
- // Repro from #34849
- const DEPS = {
-     foo: 1
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js b/testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js
index 567fd08b02..a0f3f907a3 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js
@@ -18,6 +18,7 @@ const obj: {field: Rule} = {
 };
 
 //// [contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js]
+"use strict";
 const obj = {
     field: {
         validate: (_t, _p, _s) => false,
diff --git a/testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js.diff b/testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js.diff
deleted file mode 100644
index 88df8f2a7d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js
-+++ new.contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js
-@@= skipped -17, +17 lines =@@
- };
-
- //// [contextualOverloadListFromUnionWithPrimitiveNoImplicitAny.js]
--"use strict";
- const obj = {
-     field: {
-         validate: (_t, _p, _s) => false,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js b/testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js
index 3cd8546ba0..d895846b55 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js
@@ -22,6 +22,7 @@ const banana5 = fruitFactory5(Banana) // Banana<"foo">
 
 
 //// [contextualSignatureInstantiation4.js]
+"use strict";
 // Repros from #32976
 const banana1 = fruitFactory1(Banana); // Banana<any>
 const banana2 = fruitFactory2(Banana); // Banana<any>
diff --git a/testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js.diff b/testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js.diff
deleted file mode 100644
index ad3e9202f3..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualSignatureInstantiation4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualSignatureInstantiation4.js
-+++ new.contextualSignatureInstantiation4.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [contextualSignatureInstantiation4.js]
--"use strict";
- // Repros from #32976
- const banana1 = fruitFactory1(Banana); // Banana<any>
- const banana2 = fruitFactory2(Banana); // Banana<any>
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js b/testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js
index 393a01bd29..8b564dcecc 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js
@@ -24,6 +24,7 @@ eacher((...args) => {
 
 
 //// [contextualTupleTypeParameterReadonly.js]
+"use strict";
 const cases = [
     [1, '1'],
     [2, '2'],
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js.diff b/testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js.diff
deleted file mode 100644
index 3bc70edc1a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualTupleTypeParameterReadonly.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualTupleTypeParameterReadonly.js
-+++ new.contextualTupleTypeParameterReadonly.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [contextualTupleTypeParameterReadonly.js]
--"use strict";
- const cases = [
-     [1, '1'],
-     [2, '2'],
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js b/testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js
index 0bc5c637f4..a159ea2f9c 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js
@@ -12,6 +12,7 @@ function fst({ s } = t) { }
 
 
 //// [contextualTypeForInitalizedVariablesFiltersUndefined.js]
+"use strict";
 const fInferred = ({ a = 0 } = {}) => a;
 // const fInferred: ({ a }?: { a?: number; }) => number
 const fAnnotated = ({ a = 0 } = {}) => a;
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js.diff b/testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js.diff
deleted file mode 100644
index f77b42cc2c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeForInitalizedVariablesFiltersUndefined.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualTypeForInitalizedVariablesFiltersUndefined.js
-+++ new.contextualTypeForInitalizedVariablesFiltersUndefined.js
-@@= skipped -11, +11 lines =@@
-
-
- //// [contextualTypeForInitalizedVariablesFiltersUndefined.js]
--"use strict";
- const fInferred = ({ a = 0 } = {}) => a;
- // const fInferred: ({ a }?: { a?: number; }) => number
- const fAnnotated = ({ a = 0 } = {}) => a;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js b/testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js
index 6f0ffa1045..8e8a78daec 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js
@@ -12,6 +12,7 @@ const i3: Iterable<number> | 1[] = [2];
 
 
 //// [contextualTypeIterableUnions.js]
+"use strict";
 new DMap([["1", 2]]);
 const i1 = [{ a: true }];
 const i2 = [{ b: false }];
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js.diff b/testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js.diff
deleted file mode 100644
index 104dd1cebe..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeIterableUnions.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualTypeIterableUnions.js
-+++ new.contextualTypeIterableUnions.js
-@@= skipped -11, +11 lines =@@
-
-
- //// [contextualTypeIterableUnions.js]
--"use strict";
- new DMap([["1", 2]]);
- const i1 = [{ a: true }];
- const i2 = [{ b: false }];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js b/testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js
index 2de29f37f8..6a69d37f5c 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js
@@ -18,6 +18,7 @@ function g<
 
 
 //// [contextualTypeOfIndexedAccessParameter.js]
+"use strict";
 f("a", {
     cb: p => p,
 });
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js.diff b/testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js.diff
deleted file mode 100644
index 08a5f1b9dd..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeOfIndexedAccessParameter.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualTypeOfIndexedAccessParameter.js
-+++ new.contextualTypeOfIndexedAccessParameter.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [contextualTypeOfIndexedAccessParameter.js]
--"use strict";
- f("a", {
-     cb: p => p,
- });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js b/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js
index 8b7f4e2cdf..f74537871f 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js
@@ -8,6 +8,7 @@ const f: FuncOrGeneratorFunc = function*() {
 }
 
 //// [contextualTypeOnYield1.js]
+"use strict";
 const f = function* () {
     yield (num) => console.log(num); // `num` should be inferred to have type `number`.
 };
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js.diff b/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js.diff
deleted file mode 100644
index d3edf7d964..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualTypeOnYield1.js
-+++ new.contextualTypeOnYield1.js
-@@= skipped -7, +7 lines =@@
- }
-
- //// [contextualTypeOnYield1.js]
--"use strict";
- const f = function* () {
-     yield (num) => console.log(num); // `num` should be inferred to have type `number`.
- };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js b/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js
index 58d8710b40..370c774edc 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js
@@ -7,6 +7,7 @@ const g: OrGen = function* () {
 }
 
 //// [contextualTypeOnYield2.js]
+"use strict";
 const g = function* () {
     return (num) => console.log(num);
 };
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js.diff b/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js.diff
deleted file mode 100644
index 496c4c6232..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeOnYield2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualTypeOnYield2.js
-+++ new.contextualTypeOnYield2.js
-@@= skipped -6, +6 lines =@@
- }
-
- //// [contextualTypeOnYield2.js]
--"use strict";
- const g = function* () {
-     return (num) => console.log(num);
- };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js b/testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js
index d9107649ee..126f39a35b 100644
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js
+++ b/testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js
@@ -125,6 +125,7 @@ const test: TestGeneric = {
 
 
 //// [contextualTypeShouldBeLiteral.js]
+"use strict";
 function foo(bar) { }
 foo({
     type: 'y',
diff --git a/testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js.diff b/testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js.diff
deleted file mode 100644
index 7d0a087e6f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextualTypeShouldBeLiteral.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextualTypeShouldBeLiteral.js
-+++ new.contextualTypeShouldBeLiteral.js
-@@= skipped -124, +124 lines =@@
-
-
- //// [contextualTypeShouldBeLiteral.js]
--"use strict";
- function foo(bar) { }
- foo({
-     type: 'y',
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js b/testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js
index 9d496e8aef..24d24c8422 100644
--- a/testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js
+++ b/testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js
@@ -30,6 +30,7 @@ const x: Observable<boolean> = observable(false);
 
 
 //// [contextuallyTypedBooleanLiterals.js]
+"use strict";
 // Repro from #48363
 const bn1 = box(0); // Box<number>
 const bn2 = box(0); // Ok
diff --git a/testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js.diff b/testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js.diff
deleted file mode 100644
index 82fa29fe9f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextuallyTypedBooleanLiterals.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextuallyTypedBooleanLiterals.js
-+++ new.contextuallyTypedBooleanLiterals.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [contextuallyTypedBooleanLiterals.js]
--"use strict";
- // Repro from #48363
- const bn1 = box(0); // Box<number>
- const bn2 = box(0); // Ok
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js b/testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js
index 3f40d48d0c..021c485e83 100644
--- a/testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js
+++ b/testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js
@@ -23,6 +23,7 @@ const x: { [sym: symbol]: (p: string) => void } = { [A]: s => s.length };
 
 
 //// [contextuallyTypedSymbolNamedProperties.js]
+"use strict";
 // Repros from #43628
 const A = Symbol("A");
 const B = Symbol("B");
diff --git a/testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js.diff b/testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js.diff
deleted file mode 100644
index 319e9b6cc5..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contextuallyTypedSymbolNamedProperties.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contextuallyTypedSymbolNamedProperties.js
-+++ new.contextuallyTypedSymbolNamedProperties.js
-@@= skipped -22, +22 lines =@@
-
-
- //// [contextuallyTypedSymbolNamedProperties.js]
--"use strict";
- // Repros from #43628
- const A = Symbol("A");
- const B = Symbol("B");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js b/testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js
index 4422b51fd4..1aacf64eaf 100644
--- a/testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js
+++ b/testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js
@@ -30,6 +30,7 @@ const x: List<Test> = filter1; // $ExpectType List<Test>
 
 
 //// [contravariantInferenceAndTypeGuard.js]
+"use strict";
 const list2 = new List();
 const filter1 = list2.filter(function (item, node, list) {
     this.b; // $ExpectType string
diff --git a/testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js.diff b/testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js.diff
deleted file mode 100644
index 34ab385ad2..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contravariantInferenceAndTypeGuard.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contravariantInferenceAndTypeGuard.js
-+++ new.contravariantInferenceAndTypeGuard.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [contravariantInferenceAndTypeGuard.js]
--"use strict";
- const list2 = new List();
- const filter1 = list2.filter(function (item, node, list) {
-     this.b; // $ExpectType string
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js b/testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js
index e6652a0828..b08a35696c 100644
--- a/testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js
+++ b/testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js
@@ -21,6 +21,7 @@ bar(g1, g2);
 
 
 //// [contravariantTypeAliasInference.js]
+"use strict";
 foo(f1, f2);
 bar(f1, f2);
 bar(g1, g2);
diff --git a/testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js.diff b/testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js.diff
deleted file mode 100644
index 491dbfbc03..0000000000
--- a/testdata/baselines/reference/submodule/compiler/contravariantTypeAliasInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.contravariantTypeAliasInference.js
-+++ new.contravariantTypeAliasInference.js
-@@= skipped -20, +20 lines =@@
-
-
- //// [contravariantTypeAliasInference.js]
--"use strict";
- foo(f1, f2);
- bar(f1, f2);
- bar(g1, g2);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js b/testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js
index 33122da61e..9d75fd38cb 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js
@@ -117,6 +117,7 @@ function bindingPatternInParameter({ data: data1, isSuccess: isSuccess1 }: UseQu
 
 
 //// [controlFlowAliasedDiscriminants.js]
+"use strict";
 function useQuery() {
     return {
         isSuccess: false,
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js.diff
deleted file mode 100644
index 0b0f8e4b9d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowAliasedDiscriminants.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowAliasedDiscriminants.js
-+++ new.controlFlowAliasedDiscriminants.js
-@@= skipped -116, +116 lines =@@
-
-
- //// [controlFlowAliasedDiscriminants.js]
--"use strict";
- function useQuery() {
-     return {
-         isSuccess: false,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js b/testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js
index 3f5e5cf5ed..cf5c597c9f 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js
@@ -15,6 +15,7 @@ function bar(this: string | number) {
 }
 
 //// [controlFlowAnalysisOnBareThisKeyword.js]
+"use strict";
 function bigger() {
     if (isBig(this)) {
         this.big; // Expect property to exist
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js.diff
deleted file mode 100644
index 3f3cc51104..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowAnalysisOnBareThisKeyword.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowAnalysisOnBareThisKeyword.js
-+++ new.controlFlowAnalysisOnBareThisKeyword.js
-@@= skipped -14, +14 lines =@@
- }
-
- //// [controlFlowAnalysisOnBareThisKeyword.js]
--"use strict";
- function bigger() {
-     if (isBig(this)) {
-         this.big; // Expect property to exist
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js b/testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js
index c594f32aef..c106226250 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js
@@ -61,6 +61,7 @@ Example5.value++;
 
 
 //// [controlFlowAutoAccessor1.js]
+"use strict";
 class Example {
     accessor test;
     constructor(test) {
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js.diff
deleted file mode 100644
index c880e3e82f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowAutoAccessor1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowAutoAccessor1.js
-+++ new.controlFlowAutoAccessor1.js
-@@= skipped -60, +60 lines =@@
-
-
- //// [controlFlowAutoAccessor1.js]
--"use strict";
- class Example {
-     accessor test;
-     constructor(test) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js b/testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js
index 80954b2b28..5db00d60d8 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js
@@ -18,6 +18,7 @@ user;
 
 
 //// [controlFlowBreakContinueWithLabel.js]
+"use strict";
 var User;
 (function (User) {
     User[User["A"] = 0] = "A";
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js.diff
deleted file mode 100644
index c7f07f7901..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowBreakContinueWithLabel.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowBreakContinueWithLabel.js
-+++ new.controlFlowBreakContinueWithLabel.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [controlFlowBreakContinueWithLabel.js]
--"use strict";
- var User;
- (function (User) {
-     User[User["A"] = 0] = "A";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js b/testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js
index 41b3829b9c..f45d2ca5a9 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js
@@ -10,6 +10,7 @@ function foo2(param: number | null | undefined): number | null {
 }
 
 //// [controlFlowCommaExpressionAssertionWithinTernary.js]
+"use strict";
 function foo2(param) {
     const val = param !== undefined;
     return val ? (assert(param !== undefined), param) : null;
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js.diff
deleted file mode 100644
index 759213b84b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowCommaExpressionAssertionWithinTernary.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowCommaExpressionAssertionWithinTernary.js
-+++ new.controlFlowCommaExpressionAssertionWithinTernary.js
-@@= skipped -9, +9 lines =@@
- }
-
- //// [controlFlowCommaExpressionAssertionWithinTernary.js]
--"use strict";
- function foo2(param) {
-     const val = param !== undefined;
-     return val ? (assert(param !== undefined), param) : null;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js b/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js
index 9bcb86269a..6650a641c0 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js
@@ -25,6 +25,7 @@ function foo(things: Val[]): void {
 }
 
 //// [controlFlowDestructuringLoop.js]
+"use strict";
 // Repro from #28758
 function isNumVal(x) {
     return typeof x.val === 'number';
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js.diff
deleted file mode 100644
index a919bc0a4d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringLoop.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowDestructuringLoop.js
-+++ new.controlFlowDestructuringLoop.js
-@@= skipped -24, +24 lines =@@
- }
-
- //// [controlFlowDestructuringLoop.js]
--"use strict";
- // Repro from #28758
- function isNumVal(x) {
-     return typeof x.val === 'number';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js b/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js
index 15e72f45fe..431c13a5a8 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js
@@ -24,6 +24,7 @@ e;
 
 
 //// [controlFlowDestructuringVariablesInTryCatch.js]
+"use strict";
 try {
     var a = f1();
     var [b] = f2();
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js.diff
deleted file mode 100644
index 21a1816de1..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowDestructuringVariablesInTryCatch.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowDestructuringVariablesInTryCatch.js
-+++ new.controlFlowDestructuringVariablesInTryCatch.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [controlFlowDestructuringVariablesInTryCatch.js]
--"use strict";
- try {
-     var a = f1();
-     var [b] = f2();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js b/testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js
index 5a466d0b74..2a1b81ff2e 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js
@@ -17,6 +17,7 @@ try {
 console.log(a); // <- error here
 
 //// [controlFlowFinallyNoCatchAssignments.js]
+"use strict";
 let x;
 x = Math.random();
 let a;
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js.diff
deleted file mode 100644
index d7f5ee37b4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowFinallyNoCatchAssignments.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowFinallyNoCatchAssignments.js
-+++ new.controlFlowFinallyNoCatchAssignments.js
-@@= skipped -16, +16 lines =@@
- console.log(a); // <- error here
-
- //// [controlFlowFinallyNoCatchAssignments.js]
--"use strict";
- let x;
- x = Math.random();
- let a;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js b/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js
index ed399a1757..d21dce672f 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js
@@ -43,6 +43,7 @@ class Foo {
 }
 
 //// [controlFlowForCatchAndFinally.js]
+"use strict";
 async function test() {
     let browser = undefined;
     let page = undefined;
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js.diff
index e59a5d6292..4178936a99 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowForCatchAndFinally.js.diff
@@ -1,10 +1,9 @@
 --- old.controlFlowForCatchAndFinally.js
 +++ new.controlFlowForCatchAndFinally.js
-@@= skipped -42, +42 lines =@@
- }
+@@= skipped -43, +43 lines =@@
 
  //// [controlFlowForCatchAndFinally.js]
--"use strict";
+ "use strict";
 -var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
 -    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
 -    return new (P || (P = Promise))(function (resolve, reject) {
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js b/testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js
index b109f9be6a..03146831f5 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js
@@ -9,4 +9,5 @@ const {
 
 
 //// [controlFlowInitializedDestructuringVariables.js]
+"use strict";
 const { a = "0", b = +a, } = obj;
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js.diff
deleted file mode 100644
index 53de216b59..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowInitializedDestructuringVariables.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.controlFlowInitializedDestructuringVariables.js
-+++ new.controlFlowInitializedDestructuringVariables.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [controlFlowInitializedDestructuringVariables.js]
--"use strict";
- const { a = "0", b = +a, } = obj;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js b/testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js
index ce3e295c31..c3f2c72d7a 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js
@@ -66,6 +66,7 @@ if (state) {
 
 
 //// [controlFlowManyCallExpressionStatementsPerf.js]
+"use strict";
 function test(x) { return x; }
 let state = true;
 if (state) {
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js.diff
deleted file mode 100644
index bd2f24bb1d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowManyCallExpressionStatementsPerf.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowManyCallExpressionStatementsPerf.js
-+++ new.controlFlowManyCallExpressionStatementsPerf.js
-@@= skipped -65, +65 lines =@@
-
-
- //// [controlFlowManyCallExpressionStatementsPerf.js]
--"use strict";
- function test(x) { return x; }
- let state = true;
- if (state) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js b/testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js
index 33121c7481..85c349ec83 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js
@@ -27,6 +27,7 @@ function f(x: number | null) {
 
 
 //// [controlFlowNullTypeAndLiteral.js]
+"use strict";
 // Repros from #23771
 const myNull = null;
 const objWithValMaybeNull = { val: 1 };
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js.diff
deleted file mode 100644
index 55ade78c08..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowNullTypeAndLiteral.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowNullTypeAndLiteral.js
-+++ new.controlFlowNullTypeAndLiteral.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [controlFlowNullTypeAndLiteral.js]
--"use strict";
- // Repros from #23771
- const myNull = null;
- const objWithValMaybeNull = { val: 1 };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js b/testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js
index 5639d48451..d5fe9d959f 100644
--- a/testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js
+++ b/testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js
@@ -29,6 +29,7 @@ class Example2 {
 }
 
 //// [controlFlowPrivateClassField.js]
+"use strict";
 class Example {
     #test;
     constructor(test) {
diff --git a/testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js.diff b/testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js.diff
deleted file mode 100644
index 346d8b4291..0000000000
--- a/testdata/baselines/reference/submodule/compiler/controlFlowPrivateClassField.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowPrivateClassField.js
-+++ new.controlFlowPrivateClassField.js
-@@= skipped -28, +28 lines =@@
- }
-
- //// [controlFlowPrivateClassField.js]
--"use strict";
- class Example {
-     #test;
-     constructor(test) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/correlatedUnions.js b/testdata/baselines/reference/submodule/compiler/correlatedUnions.js
index 60b89f2fb3..b033e0dfa0 100644
--- a/testdata/baselines/reference/submodule/compiler/correlatedUnions.js
+++ b/testdata/baselines/reference/submodule/compiler/correlatedUnions.js
@@ -304,6 +304,7 @@ function getValueConcrete<K extends keyof Foo1>(
 
 
 //// [correlatedUnions.js]
+"use strict";
 // Various repros from #30581
 function processRecord(rec) {
     rec.f(rec.v);
diff --git a/testdata/baselines/reference/submodule/compiler/correlatedUnions.js.diff b/testdata/baselines/reference/submodule/compiler/correlatedUnions.js.diff
index 6e2c376340..b5fbae6711 100644
--- a/testdata/baselines/reference/submodule/compiler/correlatedUnions.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/correlatedUnions.js.diff
@@ -1,14 +1,6 @@
 --- old.correlatedUnions.js
 +++ new.correlatedUnions.js
-@@= skipped -303, +303 lines =@@
-
-
- //// [correlatedUnions.js]
--"use strict";
- // Various repros from #30581
- function processRecord(rec) {
-     rec.f(rec.v);
-@@= skipped -214, +213 lines =@@
+@@= skipped -517, +517 lines =@@
  declare function createEventListener<K extends keyof DocumentEventMap>({ name, once, callback }: Ev<K>): Ev<K>;
  declare const clickEvent: {
      readonly name: "click";
diff --git a/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js b/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js
index d8ce084ae8..9ffea6e67f 100644
--- a/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js
+++ b/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js
@@ -34,7 +34,6 @@ var MsPortal;
     (function (Util) {
         let TemplateEngine;
         (function (TemplateEngine) {
-            "use strict";
             "use strict";
             class StringTemplate {
                 _templateStorage;
diff --git a/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js.diff b/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js.diff
index 30ca59df4b..9788a306ed 100644
--- a/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/crashRegressionTest.js.diff
@@ -11,13 +11,12 @@
 +        let TemplateEngine;
          (function (TemplateEngine) {
              "use strict";
-+            "use strict";
              class StringTemplate {
 +                _templateStorage;
                  constructor(templateStorage) {
                      this._templateStorage = templateStorage;
                  }
-@@= skipped -14, +16 lines =@@
+@@= skipped -14, +15 lines =@@
                  }
              }
              class TemplateStorage {
diff --git a/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js b/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js
index cec0c160c1..14d8a5da08 100644
--- a/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js
+++ b/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js
@@ -7,6 +7,7 @@ class Foo {
 }
 
 //// [declarationEmitTypeofThisInClass.js]
+"use strict";
 class Foo {
     foo;
     bar; //Public property 'bar' of exported class has or is using private name 'this'.(4031)
diff --git a/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js.diff b/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js.diff
index 9da3a505c5..ba34562938 100644
--- a/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/declarationEmitTypeofThisInClass.js.diff
@@ -1,10 +1,8 @@
 --- old.declarationEmitTypeofThisInClass.js
 +++ new.declarationEmitTypeofThisInClass.js
-@@= skipped -6, +6 lines =@@
- }
-
+@@= skipped -8, +8 lines =@@
  //// [declarationEmitTypeofThisInClass.js]
--"use strict";
+ "use strict";
  class Foo {
 +    foo;
 +    bar; //Public property 'bar' of exported class has or is using private name 'this'.(4031)
diff --git a/testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js b/testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js
index f3bc77086e..2ef1d57c7d 100644
--- a/testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js
@@ -109,6 +109,7 @@ type T1 = Foo<any>;
 
 
 //// [deeplyNestedConditionalTypes.js]
+"use strict";
 
 
 //// [deeplyNestedConditionalTypes.d.ts]
diff --git a/testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js.diff b/testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js.diff
deleted file mode 100644
index aa76336256..0000000000
--- a/testdata/baselines/reference/submodule/compiler/deeplyNestedConditionalTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.deeplyNestedConditionalTypes.js
-+++ new.deeplyNestedConditionalTypes.js
-@@= skipped -108, +108 lines =@@
-
-
- //// [deeplyNestedConditionalTypes.js]
--"use strict";
-
-
- //// [deeplyNestedConditionalTypes.d.ts]
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js b/testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js
index 34078a0951..39173ad48c 100644
--- a/testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js
+++ b/testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js
@@ -15,6 +15,7 @@ class BufferPool<E extends Enum, M extends TypeMap<E>> {
 
 
 //// [deeplyNestedConstraints.js]
+"use strict";
 // Repro from #41931
 class BufferPool {
     setArray2(_, array) {
diff --git a/testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js.diff b/testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js.diff
deleted file mode 100644
index 8c82df9c5c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/deeplyNestedConstraints.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.deeplyNestedConstraints.js
-+++ new.deeplyNestedConstraints.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [deeplyNestedConstraints.js]
--"use strict";
- // Repro from #41931
- class BufferPool {
-     setArray2(_, array) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js b/testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js
index 630503dd6e..206e98bd43 100644
--- a/testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js
@@ -56,3 +56,4 @@ type TestBit<A extends Bit, B extends Bit> = AndBit<
 type TestBitRes = TestBit<1, 1>; 
 
 //// [deferredConditionalTypes.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js.diff b/testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js.diff
deleted file mode 100644
index 77f552b07e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/deferredConditionalTypes.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.deferredConditionalTypes.js
-+++ new.deferredConditionalTypes.js
-@@= skipped -55, +55 lines =@@
- type TestBitRes = TestBit<1, 1>; 
-
- //// [deferredConditionalTypes.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js b/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js
index 274f717191..619804bd22 100644
--- a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js
+++ b/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js
@@ -29,6 +29,7 @@ function f3(x: 'a' | 'b') {
 
 
 //// [deferredLookupTypeResolution.js]
+"use strict";
 // Repro from #17456
 function f2(a) {
     return f1(a, 'x');
diff --git a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js.diff b/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js.diff
deleted file mode 100644
index 477a00692a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.deferredLookupTypeResolution.js
-+++ new.deferredLookupTypeResolution.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [deferredLookupTypeResolution.js]
--"use strict";
- // Repro from #17456
- function f2(a) {
-     return f1(a, 'x');
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js b/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js
index 50f3bff36d..74bffc481c 100644
--- a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js
+++ b/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js
@@ -25,6 +25,7 @@ type DeepOK<T> = { true: 'true', otherwise: 'false' }[Juxtapose<T>];
 
 
 //// [deferredLookupTypeResolution2.js]
+"use strict";
 // Repro from #17456
 
 
diff --git a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js.diff b/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js.diff
deleted file mode 100644
index 437c24328f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/deferredLookupTypeResolution2.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.deferredLookupTypeResolution2.js
-+++ new.deferredLookupTypeResolution2.js
-@@= skipped -24, +24 lines =@@
-
-
- //// [deferredLookupTypeResolution2.js]
--"use strict";
- // Repro from #17456
-
diff --git a/testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js b/testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js
index 35c06230fe..262eac6373 100644
--- a/testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js
+++ b/testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js
@@ -44,6 +44,7 @@ delete b.b
 
 
 //// [deleteExpressionMustBeOptional.js]
+"use strict";
 delete f.a;
 delete f.b;
 delete f.c;
diff --git a/testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js.diff b/testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js.diff
deleted file mode 100644
index 5378e4177e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/deleteExpressionMustBeOptional(strict=true).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.deleteExpressionMustBeOptional(strict=true).js
-+++ new.deleteExpressionMustBeOptional(strict=true).js
-@@= skipped -43, +43 lines =@@
-
-
- //// [deleteExpressionMustBeOptional.js]
--"use strict";
- delete f.a;
- delete f.b;
- delete f.c;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js b/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js
index 9c1e7d2ea8..01a1a8e680 100644
--- a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js
+++ b/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js
@@ -39,6 +39,7 @@ try {} catch ({ a: { b: { c: { x }} }}: unknown) { x }
 
 
 //// [destructureCatchClause.js]
+"use strict";
 // These are okay with useUnknownInCatchVariables=false, but not okay with useUnknownInCatchVariables=true.
 try { }
 catch ({ x }) {
diff --git a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js.diff b/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js.diff
deleted file mode 100644
index ea30523a36..0000000000
--- a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=false).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructureCatchClause(strict=true,useunknownincatchvariables=false).js
-+++ new.destructureCatchClause(strict=true,useunknownincatchvariables=false).js
-@@= skipped -38, +38 lines =@@
-
-
- //// [destructureCatchClause.js]
--"use strict";
- // These are okay with useUnknownInCatchVariables=false, but not okay with useUnknownInCatchVariables=true.
- try { }
- catch ({ x }) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js b/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js
index 9c1e7d2ea8..01a1a8e680 100644
--- a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js
+++ b/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js
@@ -39,6 +39,7 @@ try {} catch ({ a: { b: { c: { x }} }}: unknown) { x }
 
 
 //// [destructureCatchClause.js]
+"use strict";
 // These are okay with useUnknownInCatchVariables=false, but not okay with useUnknownInCatchVariables=true.
 try { }
 catch ({ x }) {
diff --git a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js.diff b/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js.diff
deleted file mode 100644
index de3f1c287d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/destructureCatchClause(strict=true,useunknownincatchvariables=true).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructureCatchClause(strict=true,useunknownincatchvariables=true).js
-+++ new.destructureCatchClause(strict=true,useunknownincatchvariables=true).js
-@@= skipped -38, +38 lines =@@
-
-
- //// [destructureCatchClause.js]
--"use strict";
- // These are okay with useUnknownInCatchVariables=false, but not okay with useUnknownInCatchVariables=true.
- try { }
- catch ({ x }) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js b/testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js
index 20b5671142..66feadde79 100644
--- a/testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js
+++ b/testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js
@@ -28,6 +28,7 @@ f(([_1, _2 = undefined]) => undefined)
 
 
 //// [destructuringInitializerContextualTypeFromContext.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js.diff b/testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js.diff
deleted file mode 100644
index 5a3c5763ae..0000000000
--- a/testdata/baselines/reference/submodule/compiler/destructuringInitializerContextualTypeFromContext.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructuringInitializerContextualTypeFromContext.js
-+++ new.destructuringInitializerContextualTypeFromContext.js
-@@= skipped -27, +27 lines =@@
-
-
- //// [destructuringInitializerContextualTypeFromContext.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js b/testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js
index 6f862cbff2..7449281228 100644
--- a/testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js
+++ b/testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js
@@ -9,8 +9,6 @@ function test(p: any) {
 
 //// [destructuringTempOccursAfterPrologue.js]
 function test(p) {
-    'use strict';
-    'use strong';
     'use strict';
     'use strong';
     p = { prop: p } = p;
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js.diff b/testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js.diff
deleted file mode 100644
index 8bbf3085eb..0000000000
--- a/testdata/baselines/reference/submodule/compiler/destructuringTempOccursAfterPrologue.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructuringTempOccursAfterPrologue.js
-+++ new.destructuringTempOccursAfterPrologue.js
-@@= skipped -10, +10 lines =@@
- function test(p) {
-     'use strict';
-     'use strong';
-+    'use strict';
-+    'use strong';
-     p = { prop: p } = p;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringTuple.js b/testdata/baselines/reference/submodule/compiler/destructuringTuple.js
index 02a9ff8dff..413b308f9c 100644
--- a/testdata/baselines/reference/submodule/compiler/destructuringTuple.js
+++ b/testdata/baselines/reference/submodule/compiler/destructuringTuple.js
@@ -17,6 +17,7 @@ const [oops2] = [1, 2, 3].reduce((acc: number[], e) => acc.concat(e), []);
 
 
 //// [destructuringTuple.js]
+"use strict";
 const [a, b, c, ...rest] = tuple;
 [...receiver] = tuple;
 // Repros from #32140
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringTuple.js.diff b/testdata/baselines/reference/submodule/compiler/destructuringTuple.js.diff
deleted file mode 100644
index e471f14ee5..0000000000
--- a/testdata/baselines/reference/submodule/compiler/destructuringTuple.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructuringTuple.js
-+++ new.destructuringTuple.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [destructuringTuple.js]
--"use strict";
- const [a, b, c, ...rest] = tuple;
- [...receiver] = tuple;
- // Repros from #32140
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js b/testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js
index dada973102..be292bf944 100644
--- a/testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js
+++ b/testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js
@@ -14,6 +14,7 @@ function foo<P extends Props>(props: Readonly<P>) {
 
 
 //// [destructuringWithConstraint.js]
+"use strict";
 // Repro from #22823
 function foo(props) {
     let { foo = false } = props;
diff --git a/testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js.diff b/testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js.diff
deleted file mode 100644
index 6c6c57ce24..0000000000
--- a/testdata/baselines/reference/submodule/compiler/destructuringWithConstraint.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructuringWithConstraint.js
-+++ new.destructuringWithConstraint.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [destructuringWithConstraint.js]
--"use strict";
- // Repro from #22823
- function foo(props) {
-     let { foo = false } = props;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js b/testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js
index 661c001fdb..4af2028e46 100644
--- a/testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js
+++ b/testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js
@@ -41,6 +41,7 @@ declare function isPlainObject2<T>(
 
 
 //// [discriminantNarrowingCouldBeCircular.js]
+"use strict";
 const o = {};
 if (o) {
     for (const key in o) {
diff --git a/testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js.diff b/testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js.diff
deleted file mode 100644
index 5e23b6a0f0..0000000000
--- a/testdata/baselines/reference/submodule/compiler/discriminantNarrowingCouldBeCircular.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.discriminantNarrowingCouldBeCircular.js
-+++ new.discriminantNarrowingCouldBeCircular.js
-@@= skipped -40, +40 lines =@@
-
-
- //// [discriminantNarrowingCouldBeCircular.js]
--"use strict";
- const o = {};
- if (o) {
-     for (const key in o) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js b/testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js
index cfc7f0109a..1113d2372e 100644
--- a/testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js
+++ b/testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js
@@ -13,6 +13,7 @@ const l: Thing3 = { toString: undefined }; // error, toFixed isn't null
 
 
 //// [discriminateObjectTypesOnly.js]
+"use strict";
 const k = { toFixed: null }; // OK, satisfies object
 const q = { toFixed: null };
 const h = { toString: null }; // OK, satisfies object
diff --git a/testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js.diff b/testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js.diff
deleted file mode 100644
index 804f8be116..0000000000
--- a/testdata/baselines/reference/submodule/compiler/discriminateObjectTypesOnly.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.discriminateObjectTypesOnly.js
-+++ new.discriminateObjectTypesOnly.js
-@@= skipped -12, +12 lines =@@
-
-
- //// [discriminateObjectTypesOnly.js]
--"use strict";
- const k = { toFixed: null }; // OK, satisfies object
- const q = { toFixed: null };
- const h = { toString: null }; // OK, satisfies object
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js b/testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js
index 3bcffa3516..478aef17b2 100644
--- a/testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js
+++ b/testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js
@@ -25,6 +25,7 @@ function ListItem(_data: IListItemData) {
 
 
 //// [discriminatedUnionJsxElement.jsx]
+"use strict";
 // Repro from #46021
 function Menu(data) {
     var _a;
diff --git a/testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js.diff b/testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js.diff
deleted file mode 100644
index 761ad11f9c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/discriminatedUnionJsxElement.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.discriminatedUnionJsxElement.js
-+++ new.discriminatedUnionJsxElement.js
-@@= skipped -24, +24 lines =@@
-
-
- //// [discriminatedUnionJsxElement.jsx]
--"use strict";
- // Repro from #46021
- function Menu(data) {
-     var _a;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessors1.js b/testdata/baselines/reference/submodule/compiler/divergentAccessors1.js
index a4a74ef3d1..2f03b6e381 100644
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessors1.js
+++ b/testdata/baselines/reference/submodule/compiler/divergentAccessors1.js
@@ -27,6 +27,7 @@
 
 
 //// [divergentAccessors1.js]
+"use strict";
 // Accessors in interfaces/types
 {
     const ihgs = null;
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessors1.js.diff b/testdata/baselines/reference/submodule/compiler/divergentAccessors1.js.diff
deleted file mode 100644
index e1199d33f8..0000000000
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessors1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.divergentAccessors1.js
-+++ new.divergentAccessors1.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [divergentAccessors1.js]
--"use strict";
- // Accessors in interfaces/types
- {
-     const ihgs = null;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js b/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js
index f0d1bb8fba..bd401262c1 100644
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js
+++ b/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js
@@ -66,6 +66,7 @@ type Test3 = {
 }
 
 //// [divergentAccessorsTypes1.js]
+"use strict";
 class Test1 {
     get foo() { return ""; }
     set foo(s) {
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js.diff b/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js.diff
deleted file mode 100644
index 61a485c952..0000000000
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.divergentAccessorsTypes1.js
-+++ new.divergentAccessorsTypes1.js
-@@= skipped -65, +65 lines =@@
- }
-
- //// [divergentAccessorsTypes1.js]
--"use strict";
- class Test1 {
-     get foo() { return ""; }
-     set foo(s) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js b/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js
index b8948e57d2..07b613767e 100644
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js
+++ b/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js
@@ -14,6 +14,7 @@ s.foo = 42;
 
 
 //// [divergentAccessorsTypes2.js]
+"use strict";
 class Test1 {
     get foo() { return null; }
     set foo(s) {
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js.diff b/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js.diff
deleted file mode 100644
index ed8e8adc97..0000000000
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessorsTypes2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.divergentAccessorsTypes2.js
-+++ new.divergentAccessorsTypes2.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [divergentAccessorsTypes2.js]
--"use strict";
- class Test1 {
-     get foo() { return null; }
-     set foo(s) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js b/testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js
index a3994b3bbd..bd653d9fce 100644
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js
+++ b/testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js
@@ -161,6 +161,7 @@ function fn() {
 
 
 //// [divergentAccessorsVisibility1.js]
+"use strict";
 class Base {
     get PublicPublic() { return 0; }
     set PublicPublic(v) { return; }
diff --git a/testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js.diff b/testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js.diff
deleted file mode 100644
index 37ec30581f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/divergentAccessorsVisibility1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.divergentAccessorsVisibility1.js
-+++ new.divergentAccessorsVisibility1.js
-@@= skipped -160, +160 lines =@@
-
-
- //// [divergentAccessorsVisibility1.js]
--"use strict";
- class Base {
-     get PublicPublic() { return 0; }
-     set PublicPublic(v) { return; }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js b/testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js
index 99a91703a7..fe025869e4 100644
--- a/testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js
+++ b/testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js
@@ -15,6 +15,7 @@ let obj: { 3: string } = { 3: "three" };
 obj[x];
 
 //// [duplicateErrorAssignability.js]
+"use strict";
 const x = a = b;
 let obj = { 3: "three" };
 obj[x];
diff --git a/testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js.diff b/testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js.diff
deleted file mode 100644
index 7cc8df4aa7..0000000000
--- a/testdata/baselines/reference/submodule/compiler/duplicateErrorAssignability.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.duplicateErrorAssignability.js
-+++ new.duplicateErrorAssignability.js
-@@= skipped -14, +14 lines =@@
- obj[x];
-
- //// [duplicateErrorAssignability.js]
--"use strict";
- const x = a = b;
- let obj = { 3: "three" };
- obj[x];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js b/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js
index f4b49fb146..49e99d2c95 100644
--- a/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js
+++ b/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js
@@ -23,6 +23,7 @@ let obj: { 3: string } = { 3: "three" };
 obj[x];
 
 //// [duplicateErrorClassExpression.js]
+"use strict";
 class Base {
     foo;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js.diff b/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js.diff
index d6f782811e..788d4561af 100644
--- a/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/duplicateErrorClassExpression.js.diff
@@ -1,10 +1,8 @@
 --- old.duplicateErrorClassExpression.js
 +++ new.duplicateErrorClassExpression.js
-@@= skipped -22, +22 lines =@@
- obj[x];
-
+@@= skipped -24, +24 lines =@@
  //// [duplicateErrorClassExpression.js]
--"use strict";
+ "use strict";
  class Base {
 +    foo;
  }
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js
index 06d18caa72..5df04ebcb0 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js
@@ -22,8 +22,6 @@ class A {
 class B extends A {
     x;
     constructor(x) {
-        "use strict";
-        'someStringForEgngInject';
         "use strict";
         'someStringForEgngInject';
         super();
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js.diff b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js.diff
index 6f1e0e132d..a44084a7f7 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1.js.diff
@@ -12,8 +12,5 @@
  class B extends A {
 +    x;
      constructor(x) {
-+        "use strict";
-+        'someStringForEgngInject';
          "use strict";
-         'someStringForEgngInject';
-         super();
\ No newline at end of file
+         'someStringForEgngInject';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js
index 5be2f066d1..905a6e9e0d 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js
@@ -22,8 +22,6 @@ class A {
 class B extends A {
     x;
     constructor(x) {
-        "use strict";
-        'someStringForEgngInject';
         "use strict";
         'someStringForEgngInject';
         super();
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js.diff b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js.diff
index 8e70ccc6b8..df5c424a39 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitParameterPropertyDeclaration1ES6.js.diff
@@ -12,8 +12,5 @@
  class B extends A {
 +    x;
      constructor(x) {
-+        "use strict";
-+        'someStringForEgngInject';
          "use strict";
-         'someStringForEgngInject';
-         super();
\ No newline at end of file
+         'someStringForEgngInject';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js
index 5492998dec..e99edef88b 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js
@@ -24,8 +24,6 @@ class A {
 class B extends A {
     blub = 12;
     constructor() {
-        "use strict";
-        'someStringForEgngInject';
         "use strict";
         'someStringForEgngInject';
         super();
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js.diff b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js.diff
index 24edb87295..fc27dd53af 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1.js.diff
@@ -12,8 +12,6 @@
  class B extends A {
 +    blub = 12;
      constructor() {
-+        "use strict";
-+        'someStringForEgngInject';
          "use strict";
          'someStringForEgngInject';
          super();
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js
index b4207bcc5c..7e911c20e0 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js
@@ -23,7 +23,6 @@ class A {
 class B extends A {
     blub = 12;
     constructor() {
-        'someStringForEgngInject';
         'someStringForEgngInject';
         super();
     }
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js.diff b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js.diff
index 51ce0e6d99..847ad90db7 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclaration1ES6.js.diff
@@ -12,7 +12,6 @@
  class B extends A {
 +    blub = 12;
      constructor() {
-+        'someStringForEgngInject';
          'someStringForEgngInject';
          super();
 -        this.blub = 12;
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js
index a4abe58369..d9f3dfd292 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js
@@ -23,8 +23,6 @@ class B extends A {
     x;
     blah = 2;
     constructor(x) {
-        "use strict";
-        'someStringForEgngInject';
         "use strict";
         'someStringForEgngInject';
         super();
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js.diff b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js.diff
index ab9d334c74..8c968fc319 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1.js.diff
@@ -15,8 +15,6 @@
      constructor(x) {
          "use strict";
          'someStringForEgngInject';
-+        "use strict";
-+        'someStringForEgngInject';
          super();
          this.x = x;
 -        this.blah = 2;
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js
index 59e9a7401f..a8b4c7a50b 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js
@@ -23,8 +23,6 @@ class B extends A {
     x;
     blah = 2;
     constructor(x) {
-        "use strict";
-        'someStringForEgngInject';
         "use strict";
         'someStringForEgngInject';
         super();
diff --git a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js.diff b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js.diff
index 7590ac5e30..a52e07e863 100644
--- a/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/emitSuperCallBeforeEmitPropertyDeclarationAndParameterPropertyDeclaration1ES6.js.diff
@@ -15,8 +15,6 @@
      constructor(x) {
          "use strict";
          'someStringForEgngInject';
-+        "use strict";
-+        'someStringForEgngInject';
          super();
          this.x = x;
 -        this.blah = 2;
diff --git a/testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js b/testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js
index 92755b4824..d1380ec35a 100644
--- a/testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js
+++ b/testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js
@@ -26,6 +26,7 @@ function overloadingFunction(): second.E {
 }
 
 //// [enumAssignmentCompat7.js]
+"use strict";
 var first;
 (function (first) {
     let E;
diff --git a/testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js.diff b/testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js.diff
deleted file mode 100644
index 469f25365b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/enumAssignmentCompat7.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.enumAssignmentCompat7.js
-+++ new.enumAssignmentCompat7.js
-@@= skipped -25, +25 lines =@@
- }
-
- //// [enumAssignmentCompat7.js]
--"use strict";
- var first;
- (function (first) {
-     let E;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js b/testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js
index 1c3a41ed4b..0ac0a6afb3 100644
--- a/testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js
+++ b/testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js
@@ -49,6 +49,7 @@ else {
 }
 
 //// [errorOnEnumReferenceInCondition.js]
+"use strict";
 var Nums;
 (function (Nums) {
     Nums[Nums["Zero"] = 0] = "Zero";
diff --git a/testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js.diff b/testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js.diff
deleted file mode 100644
index 24c4ab5208..0000000000
--- a/testdata/baselines/reference/submodule/compiler/errorOnEnumReferenceInCondition.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.errorOnEnumReferenceInCondition.js
-+++ new.errorOnEnumReferenceInCondition.js
-@@= skipped -48, +48 lines =@@
- }
-
- //// [errorOnEnumReferenceInCondition.js]
--"use strict";
- var Nums;
- (function (Nums) {
-     Nums[Nums["Zero"] = 0] = "Zero";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js b/testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js
index 567f6b58da..5421b15e0b 100644
--- a/testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js
+++ b/testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js
@@ -14,3 +14,4 @@ interface B<M extends EventMap> extends A {
 }
 
 //// [eventEmitterPatternWithRecordOfFunction.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js.diff b/testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js.diff
deleted file mode 100644
index 59094d6184..0000000000
--- a/testdata/baselines/reference/submodule/compiler/eventEmitterPatternWithRecordOfFunction.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.eventEmitterPatternWithRecordOfFunction.js
-+++ new.eventEmitterPatternWithRecordOfFunction.js
-@@= skipped -13, +13 lines =@@
- }
-
- //// [eventEmitterPatternWithRecordOfFunction.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js b/testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js
index 88422a6c52..76efc28dd9 100644
--- a/testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js
+++ b/testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js
@@ -9,6 +9,7 @@ for (var a in C) {
 
 
 //// [evolvingArrayResolvedAssert.js]
+"use strict";
 var C = [];
 for (var a in C) {
     if (C.hasOwnProperty(a)) {
diff --git a/testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js.diff b/testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js.diff
deleted file mode 100644
index 67d1d02463..0000000000
--- a/testdata/baselines/reference/submodule/compiler/evolvingArrayResolvedAssert.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.evolvingArrayResolvedAssert.js
-+++ new.evolvingArrayResolvedAssert.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [evolvingArrayResolvedAssert.js]
--"use strict";
- var C = [];
- for (var a in C) {
-     if (C.hasOwnProperty(a)) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js b/testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js
index 42b62d11f4..90927062e3 100644
--- a/testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js
+++ b/testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js
@@ -7,4 +7,5 @@ fn({ z: 3, a: 3 });
 
 
 //// [excessPropertiesInOverloads.js]
+"use strict";
 fn({ z: 3, a: 3 });
diff --git a/testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js.diff b/testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js.diff
deleted file mode 100644
index b8b027978e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/excessPropertiesInOverloads.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.excessPropertiesInOverloads.js
-+++ new.excessPropertiesInOverloads.js
-@@= skipped -6, +6 lines =@@
-
-
- //// [excessPropertiesInOverloads.js]
--"use strict";
- fn({ z: 3, a: 3 });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js b/testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js
index 349edda7b7..74b91666fe 100644
--- a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js
+++ b/testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js
@@ -18,6 +18,7 @@ const yy: Record<string, A> & Record<string, B> = {
 
 
 //// [excessPropertyCheckIntersectionWithIndexSignature.js]
+"use strict";
 // Repro from #51875
 let x;
 x = { y: { a: 0 } }; // Error
diff --git a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js.diff b/testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js.diff
deleted file mode 100644
index 5156612962..0000000000
--- a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckIntersectionWithIndexSignature.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.excessPropertyCheckIntersectionWithIndexSignature.js
-+++ new.excessPropertyCheckIntersectionWithIndexSignature.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [excessPropertyCheckIntersectionWithIndexSignature.js]
--"use strict";
- // Repro from #51875
- let x;
- x = { y: { a: 0 } }; // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js b/testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js
index bb71f95023..599c84f4b8 100644
--- a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js
+++ b/testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js
@@ -155,6 +155,7 @@ F2({
 
 
 //// [excessPropertyCheckWithUnions.js]
+"use strict";
 let wrong = { tag: "T", a1: "extra" };
 wrong = { tag: "A", d20: 12 };
 wrong = { tag: "D" };
diff --git a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js.diff b/testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js.diff
deleted file mode 100644
index 405702c061..0000000000
--- a/testdata/baselines/reference/submodule/compiler/excessPropertyCheckWithUnions.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.excessPropertyCheckWithUnions.js
-+++ new.excessPropertyCheckWithUnions.js
-@@= skipped -154, +154 lines =@@
-
-
- //// [excessPropertyCheckWithUnions.js]
--"use strict";
- let wrong = { tag: "T", a1: "extra" };
- wrong = { tag: "A", d20: 12 };
- wrong = { tag: "D" };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js b/testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js
index ec7240b8bf..8357fd67e0 100644
--- a/testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js
+++ b/testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js
@@ -40,6 +40,7 @@ function functionC(): void {
 
 
 //// [exhaustiveSwitchCheckCircularity.js]
+"use strict";
 // Repro from #47539
 function f() {
     let foo = "aaa";
diff --git a/testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js.diff b/testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js.diff
deleted file mode 100644
index 6f44da6b5b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/exhaustiveSwitchCheckCircularity.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.exhaustiveSwitchCheckCircularity.js
-+++ new.exhaustiveSwitchCheckCircularity.js
-@@= skipped -39, +39 lines =@@
-
-
- //// [exhaustiveSwitchCheckCircularity.js]
--"use strict";
- // Repro from #47539
- function f() {
-     let foo = "aaa";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js b/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js
index 880fe1e0e1..ab8848e2a3 100644
--- a/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js
+++ b/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js
@@ -31,6 +31,7 @@ type TComeOnBar = typeof Bar<?string?>;
 
 
 //// [expressionWithJSDocTypeArguments.js]
+"use strict";
 // Repro from #51802
 function foo(x) { return x; }
 class Bar {
diff --git a/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js.diff b/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js.diff
index 269ca2f526..f8be8ad9b7 100644
--- a/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/expressionWithJSDocTypeArguments.js.diff
@@ -1,10 +1,6 @@
 --- old.expressionWithJSDocTypeArguments.js
 +++ new.expressionWithJSDocTypeArguments.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [expressionWithJSDocTypeArguments.js]
--"use strict";
+@@= skipped -34, +34 lines =@@
  // Repro from #51802
  function foo(x) { return x; }
  class Bar {
diff --git a/testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js b/testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js
index f6a41d4142..72e0512425 100644
--- a/testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js
+++ b/testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js
@@ -10,6 +10,7 @@ if (match !== null) {
 
 
 //// [firstMatchRegExpMatchArray.js]
+"use strict";
 const match = ''.match(/ /);
 if (match !== null) {
     const foo = match[0];
diff --git a/testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js.diff b/testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js.diff
deleted file mode 100644
index 7263dbe607..0000000000
--- a/testdata/baselines/reference/submodule/compiler/firstMatchRegExpMatchArray.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.firstMatchRegExpMatchArray.js
-+++ new.firstMatchRegExpMatchArray.js
-@@= skipped -9, +9 lines =@@
-
-
- //// [firstMatchRegExpMatchArray.js]
--"use strict";
- const match = ''.match(/ /);
- if (match !== null) {
-     const foo = match[0];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js b/testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js
index 42f1f7cf4a..217c8bfb4d 100644
--- a/testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js
+++ b/testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js
@@ -25,6 +25,7 @@ function f<Arr, D extends number>(x: FlatArray<Arr, any>, y: FlatArray<Arr, D>)
 
 
 //// [flatArrayNoExcessiveStackDepth.js]
+"use strict";
 // Repro from #43493
 const bar = foo.flatMap(bar => bar);
 // Repros from comments in #43249
diff --git a/testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js.diff b/testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js.diff
deleted file mode 100644
index c9bcb682b0..0000000000
--- a/testdata/baselines/reference/submodule/compiler/flatArrayNoExcessiveStackDepth.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.flatArrayNoExcessiveStackDepth.js
-+++ new.flatArrayNoExcessiveStackDepth.js
-@@= skipped -24, +24 lines =@@
-
-
- //// [flatArrayNoExcessiveStackDepth.js]
--"use strict";
- // Repro from #43493
- const bar = foo.flatMap(bar => bar);
- // Repros from comments in #43249
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js b/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js
index d85f6d178f..2e3a279019 100644
--- a/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js
+++ b/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js
@@ -30,6 +30,7 @@ const obj2 = { d: 'd' } as const
 
 
 //// [forwardRefInTypeDeclaration.js]
+"use strict";
 const s1 = "x";
 const s2 = "x";
 const s3 = "x";
diff --git a/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js.diff b/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js.diff
index cd313ceab0..0437897b4f 100644
--- a/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js.diff
+++ b/testdata/baselines/reference/submodule/compiler/forwardRefInTypeDeclaration(strict=true).js.diff
@@ -1,13 +1,6 @@
 --- old.forwardRefInTypeDeclaration(strict=true).js
 +++ new.forwardRefInTypeDeclaration(strict=true).js
-@@= skipped -29, +29 lines =@@
-
-
- //// [forwardRefInTypeDeclaration.js]
--"use strict";
- const s1 = "x";
- const s2 = "x";
- const s3 = "x";
+@@= skipped -36, +36 lines =@@
  const s4 = "x";
  const s5 = "x";
  class Cls2 {
diff --git a/testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js b/testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js
index d0d355ef63..8ed0fdbe37 100644
--- a/testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js
+++ b/testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js
@@ -9,6 +9,7 @@ q("x");
 
 
 //// [freshLiteralTypesInIntersections.js]
+"use strict";
 // Repro from #19657
 const q = func("x", ["x"]);
 q("x");
diff --git a/testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js.diff b/testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js.diff
deleted file mode 100644
index 2186d4d734..0000000000
--- a/testdata/baselines/reference/submodule/compiler/freshLiteralTypesInIntersections.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.freshLiteralTypesInIntersections.js
-+++ new.freshLiteralTypesInIntersections.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [freshLiteralTypesInIntersections.js]
--"use strict";
- // Repro from #19657
- const q = func("x", ["x"]);
- q("x");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js b/testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js
index 4cad442684..3be1c66499 100644
--- a/testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js
+++ b/testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js
@@ -5,5 +5,6 @@ function func() {}
 const array: ArrayLike<any> = func;
 
 //// [functionAssignabilityWithArrayLike01.js]
+"use strict";
 function func() { }
 const array = func;
diff --git a/testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js.diff b/testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js.diff
deleted file mode 100644
index 54d593f8ce..0000000000
--- a/testdata/baselines/reference/submodule/compiler/functionAssignabilityWithArrayLike01(strict=true).js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.functionAssignabilityWithArrayLike01(strict=true).js
-+++ new.functionAssignabilityWithArrayLike01(strict=true).js
-@@= skipped -4, +4 lines =@@
- const array: ArrayLike<any> = func;
-
- //// [functionAssignabilityWithArrayLike01.js]
--"use strict";
- function func() { }
- const array = func;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js b/testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js
index ad55053719..889d3c13a8 100644
--- a/testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js
+++ b/testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js
@@ -23,6 +23,7 @@ function callN<T extends A | B>(p: T) {
 }
 
 //// [functionCallOnConstrainedTypeVariable.js]
+"use strict";
 // Repro from #20196
 function call0(p) {
     p.a("s"); // Error
diff --git a/testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js.diff b/testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js.diff
deleted file mode 100644
index 89ac39c155..0000000000
--- a/testdata/baselines/reference/submodule/compiler/functionCallOnConstrainedTypeVariable.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.functionCallOnConstrainedTypeVariable.js
-+++ new.functionCallOnConstrainedTypeVariable.js
-@@= skipped -22, +22 lines =@@
- }
-
- //// [functionCallOnConstrainedTypeVariable.js]
--"use strict";
- // Repro from #20196
- function call0(p) {
-     p.a("s"); // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js b/testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js
index 238fdea900..954c531cfa 100644
--- a/testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js
+++ b/testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js
@@ -29,6 +29,7 @@ const toThenableInferred = <Result, Input>(fn: (input: Input) => Result | Thenab
 
 
 //// [genericCallWithinOwnBodyCastTypeParameterIdentity.js]
+"use strict";
 const toThenable = (fn) => (input) => {
     const result = fn(input);
     return {
diff --git a/testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js.diff b/testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js.diff
deleted file mode 100644
index fce0cfae13..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericCallWithinOwnBodyCastTypeParameterIdentity.js
-+++ new.genericCallWithinOwnBodyCastTypeParameterIdentity.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [genericCallWithinOwnBodyCastTypeParameterIdentity.js]
--"use strict";
- const toThenable = (fn) => (input) => {
-     const result = fn(input);
-     return {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js b/testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js
index 66dd327563..f7ea78b01d 100644
--- a/testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js
+++ b/testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js
@@ -9,6 +9,7 @@ const a = f(<K extends string>(_: K) => _ => ({}));  // <K extends string>(_: K)
 
 
 //// [genericFunctionsNotContextSensitive.js]
+"use strict";
 // Repro from #37110
 const f = (_) => _;
 const a = f((_) => _ => ({})); // <K extends string>(_: K) => <G>(_: G) => {}
diff --git a/testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js.diff b/testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js.diff
deleted file mode 100644
index e734247968..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericFunctionsNotContextSensitive.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericFunctionsNotContextSensitive.js
-+++ new.genericFunctionsNotContextSensitive.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [genericFunctionsNotContextSensitive.js]
--"use strict";
- // Repro from #37110
- const f = (_) => _;
- const a = f((_) => _ => ({})); // <K extends string>(_: K) => <G>(_: G) => {}
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js b/testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js
index 404e6a0271..0dc883cc89 100644
--- a/testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js
+++ b/testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js
@@ -16,6 +16,7 @@ f1<"b">(event => { });
 
 
 //// [genericInferenceDefaultTypeParameter.js]
+"use strict";
 // Repro from #50858
 f1(event => { });
 f1(event => { });
diff --git a/testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js.diff b/testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js.diff
deleted file mode 100644
index 4c3d1313c7..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericInferenceDefaultTypeParameter.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericInferenceDefaultTypeParameter.js
-+++ new.genericInferenceDefaultTypeParameter.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [genericInferenceDefaultTypeParameter.js]
--"use strict";
- // Repro from #50858
- f1(event => { });
- f1(event => { });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js b/testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js
index 98b27f0aa0..4f6c2901ae 100644
--- a/testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js
+++ b/testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js
@@ -13,6 +13,7 @@ let o2: { b: string, x: number } = test(o1);
 
 
 //// [genericIsNeverEmptyObject.js]
+"use strict";
 // Repro from #29067
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
diff --git a/testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js.diff b/testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js.diff
deleted file mode 100644
index e93cafb9c8..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericIsNeverEmptyObject.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericIsNeverEmptyObject.js
-+++ new.genericIsNeverEmptyObject.js
-@@= skipped -12, +12 lines =@@
-
-
- //// [genericIsNeverEmptyObject.js]
--"use strict";
- // Repro from #29067
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js b/testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js
index bf184227d9..425c23a32c 100644
--- a/testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js
+++ b/testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js
@@ -29,6 +29,7 @@ interface RecordInterface2<K extends keyof any, V> extends RemapRecord<K, V> {}
 
 
 //// [genericMappedTypeAsClause.js]
+"use strict";
 const foo1 = { aFoo: 'test', bFoo: 42 };
 const foo2 = { bFoo: 'bar' }; // Error
 function f1() {
diff --git a/testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js.diff b/testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js.diff
deleted file mode 100644
index f850b4d1de..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericMappedTypeAsClause.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericMappedTypeAsClause.js
-+++ new.genericMappedTypeAsClause.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [genericMappedTypeAsClause.js]
--"use strict";
- const foo1 = { aFoo: 'test', bFoo: 42 };
- const foo2 = { bFoo: 'bar' }; // Error
- function f1() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericRestTypes.js b/testdata/baselines/reference/submodule/compiler/genericRestTypes.js
index cc93397822..32cc291aab 100644
--- a/testdata/baselines/reference/submodule/compiler/genericRestTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/genericRestTypes.js
@@ -30,6 +30,7 @@ function assignmentWithComplexRest3<T extends any[]>() {
 }
 
 //// [genericRestTypes.js]
+"use strict";
 // Repro from #25793
 function assignmentWithComplexRest() {
     const fn1 = (x, ..._) => x;
diff --git a/testdata/baselines/reference/submodule/compiler/genericRestTypes.js.diff b/testdata/baselines/reference/submodule/compiler/genericRestTypes.js.diff
deleted file mode 100644
index 865211326a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericRestTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericRestTypes.js
-+++ new.genericRestTypes.js
-@@= skipped -29, +29 lines =@@
- }
-
- //// [genericRestTypes.js]
--"use strict";
- // Repro from #25793
- function assignmentWithComplexRest() {
-     const fn1 = (x, ..._) => x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js b/testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js
index 1a0cf014d5..61aaac7554 100644
--- a/testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js
+++ b/testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js
@@ -22,6 +22,7 @@ function user<T>(t: T) {
 
 
 //// [genericUnboundedTypeParamAssignability.js]
+"use strict";
 function f1(o) {
     o.toString(); // error
 }
diff --git a/testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js.diff b/testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js.diff
deleted file mode 100644
index 090c302909..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericUnboundedTypeParamAssignability.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericUnboundedTypeParamAssignability.js
-+++ new.genericUnboundedTypeParamAssignability.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [genericUnboundedTypeParamAssignability.js]
--"use strict";
- function f1(o) {
-     o.toString(); // error
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js b/testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js
index a77dd8e31a..27e781af5c 100644
--- a/testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js
+++ b/testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js
@@ -32,6 +32,7 @@ function yes<T extends object | null | undefined>() {
 }
 
 //// [genericWithNoConstraintComparableWithCurlyCurly.js]
+"use strict";
 function foo() {
     let x = {};
     x;
diff --git a/testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js.diff b/testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js.diff
deleted file mode 100644
index b70eed9488..0000000000
--- a/testdata/baselines/reference/submodule/compiler/genericWithNoConstraintComparableWithCurlyCurly.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericWithNoConstraintComparableWithCurlyCurly.js
-+++ new.genericWithNoConstraintComparableWithCurlyCurly.js
-@@= skipped -31, +31 lines =@@
- }
-
- //// [genericWithNoConstraintComparableWithCurlyCurly.js]
--"use strict";
- function foo() {
-     let x = {};
-     x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js b/testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js
index 20d85a7956..6431ba8cb8 100644
--- a/testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js
+++ b/testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js
@@ -13,5 +13,6 @@ cases(fn(opts => { }));
 
 
 //// [getParameterNameAtPosition.js]
+"use strict";
 // Repro from #30171
 cases(fn(opts => { }));
diff --git a/testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js.diff b/testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js.diff
deleted file mode 100644
index 3377b2d600..0000000000
--- a/testdata/baselines/reference/submodule/compiler/getParameterNameAtPosition.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.getParameterNameAtPosition.js
-+++ new.getParameterNameAtPosition.js
-@@= skipped -12, +12 lines =@@
-
-
- //// [getParameterNameAtPosition.js]
--"use strict";
- // Repro from #30171
- cases(fn(opts => { }));
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js b/testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js
index b9a0520567..b6c3bb1ef9 100644
--- a/testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js
+++ b/testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js
@@ -11,6 +11,7 @@ function f<TType>(
 
 
 //// [homomorphicMappedTypeIntersectionAssignability.js]
+"use strict";
 function f(a, b, c) {
     c = a; // Works
     b = a; // Should also work
diff --git a/testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js.diff b/testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js.diff
deleted file mode 100644
index aedf81ef3c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/homomorphicMappedTypeIntersectionAssignability.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.homomorphicMappedTypeIntersectionAssignability.js
-+++ new.homomorphicMappedTypeIntersectionAssignability.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [homomorphicMappedTypeIntersectionAssignability.js]
--"use strict";
- function f(a, b, c) {
-     c = a; // Works
-     b = a; // Should also work
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js b/testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js
index 3756895cc1..3beca81775 100644
--- a/testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js
@@ -21,6 +21,7 @@ function f1(state: State<{ foo: number }>) {
 
 
 //// [identityRelationNeverTypes.js]
+"use strict";
 // Repro from #47996
 function f1(state) {
     if (state.matches('a') && state.matches('a.b')) {
diff --git a/testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js.diff b/testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js.diff
deleted file mode 100644
index 9d389e331e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/identityRelationNeverTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.identityRelationNeverTypes.js
-+++ new.identityRelationNeverTypes.js
-@@= skipped -20, +20 lines =@@
-
-
- //// [identityRelationNeverTypes.js]
--"use strict";
- // Repro from #47996
- function f1(state) {
-     if (state.matches('a') && state.matches('a.b')) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js b/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js
index 5a94601829..59709a4b60 100644
--- a/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js
+++ b/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js
@@ -33,6 +33,7 @@ if (instance instanceof ClassOne) {
 
 
 //// [inKeywordAndIntersection.js]
+"use strict";
 class A {
     a = 0;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js.diff b/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js.diff
index bc115a2d7f..09af9e577d 100644
--- a/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/inKeywordAndIntersection.js.diff
@@ -1,10 +1,8 @@
 --- old.inKeywordAndIntersection.js
 +++ new.inKeywordAndIntersection.js
-@@= skipped -32, +32 lines =@@
-
-
+@@= skipped -34, +34 lines =@@
  //// [inKeywordAndIntersection.js]
--"use strict";
+ "use strict";
  class A {
 -    constructor() {
 -        this.a = 0;
diff --git a/testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js b/testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js
index c4500d57d5..9357ea4b7a 100644
--- a/testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js
+++ b/testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js
@@ -54,6 +54,7 @@ function f7<T extends object>(x: T & {}) {
 
 
 //// [inKeywordAndUnknown.js]
+"use strict";
 // Repro from #50531
 function f(x, y) {
     if (!("a" in x)) {
diff --git a/testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js.diff b/testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js.diff
deleted file mode 100644
index 67512f2575..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inKeywordAndUnknown.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inKeywordAndUnknown.js
-+++ new.inKeywordAndUnknown.js
-@@= skipped -53, +53 lines =@@
-
-
- //// [inKeywordAndUnknown.js]
--"use strict";
- // Repro from #50531
- function f(x, y) {
-     if (!("a" in x)) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js b/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js
index c65b5afbc3..06e52eb617 100644
--- a/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js
+++ b/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js
@@ -387,6 +387,7 @@ function test3<T extends any[] | Record<string, any>>(obj: T) {
 
 
 //// [inKeywordTypeguard.js]
+"use strict";
 class A {
     a;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js.diff b/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js.diff
index a611918991..3be5bf99d0 100644
--- a/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js.diff
+++ b/testdata/baselines/reference/submodule/compiler/inKeywordTypeguard(strict=true).js.diff
@@ -1,10 +1,8 @@
 --- old.inKeywordTypeguard(strict=true).js
 +++ new.inKeywordTypeguard(strict=true).js
-@@= skipped -386, +386 lines =@@
-
-
+@@= skipped -388, +388 lines =@@
  //// [inKeywordTypeguard.js]
--"use strict";
+ "use strict";
  class A {
 +    a;
  }
@@ -13,7 +11,7 @@
  }
  function negativeClassesTest(x) {
      if ("a" in x) {
-@@= skipped -22, +23 lines =@@
+@@= skipped -20, +22 lines =@@
      }
  }
  class AWithOptionalProp {
diff --git a/testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js b/testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js
index 86e879bbd1..35fab02487 100644
--- a/testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js
+++ b/testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js
@@ -17,6 +17,7 @@ else {
 
 
 //// [incrementOnNullAssertion.js]
+"use strict";
 const x = 'bar';
 let foo = {};
 if (foo[x] === undefined) {
diff --git a/testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js.diff b/testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js.diff
deleted file mode 100644
index 8966d0349f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/incrementOnNullAssertion.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.incrementOnNullAssertion.js
-+++ new.incrementOnNullAssertion.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [incrementOnNullAssertion.js]
--"use strict";
- const x = 'bar';
- let foo = {};
- if (foo[x] === undefined) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js b/testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js
index aa6873ef82..f09800ae2f 100644
--- a/testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js
+++ b/testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js
@@ -36,6 +36,7 @@ interface IEntity<T extends string> extends IBaseEntity {
 
 
 //// [indexSignatureAndMappedType.js]
+"use strict";
 // A mapped type { [P in K]: X }, where K is a generic type, is related to
 // { [key: string]: Y } if X is related to Y.
 function f1(x, y) {
diff --git a/testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js.diff b/testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js.diff
deleted file mode 100644
index f7a4e38889..0000000000
--- a/testdata/baselines/reference/submodule/compiler/indexSignatureAndMappedType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.indexSignatureAndMappedType.js
-+++ new.indexSignatureAndMappedType.js
-@@= skipped -35, +35 lines =@@
-
-
- //// [indexSignatureAndMappedType.js]
--"use strict";
- // A mapped type { [P in K]: X }, where K is a generic type, is related to
- // { [key: string]: Y } if X is related to Y.
- function f1(x, y) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js b/testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js
index 4edee77031..73409f466e 100644
--- a/testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js
+++ b/testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js
@@ -9,5 +9,6 @@ type Test = keyof typeof Foo;
 
 
 //// [indexTypeNoSubstitutionTemplateLiteral.js]
+"use strict";
 function Foo() { }
 Foo[`b`] = function () { };
diff --git a/testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js.diff b/testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js.diff
deleted file mode 100644
index d2902f02fc..0000000000
--- a/testdata/baselines/reference/submodule/compiler/indexTypeNoSubstitutionTemplateLiteral.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.indexTypeNoSubstitutionTemplateLiteral.js
-+++ new.indexTypeNoSubstitutionTemplateLiteral.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [indexTypeNoSubstitutionTemplateLiteral.js]
--"use strict";
- function Foo() { }
- Foo[`b`] = function () { };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js b/testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js
index 7a7aed1ed6..d4df89963f 100644
--- a/testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js
+++ b/testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js
@@ -24,6 +24,7 @@ function f2<M extends object>(mymap: MyMap<M>, k: keyof M, z: { x: number }) {
 
 
 //// [indexedAccessNormalization.js]
+"use strict";
 // Repro from from #43152
 function f1(mymap, k) {
     const elemofM = mymap[k];
diff --git a/testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js.diff b/testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js.diff
deleted file mode 100644
index d3057e5365..0000000000
--- a/testdata/baselines/reference/submodule/compiler/indexedAccessNormalization.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.indexedAccessNormalization.js
-+++ new.indexedAccessNormalization.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [indexedAccessNormalization.js]
--"use strict";
- // Repro from from #43152
- function f1(mymap, k) {
-     const elemofM = mymap[k];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js b/testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js
index fd81039137..446859b746 100644
--- a/testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js
+++ b/testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js
@@ -57,6 +57,7 @@ function grault(id: string) {
 
 
 //// [indexedAccessWithFreshObjectLiteral.js]
+"use strict";
 function foo(id) {
     return {
         a: 1,
diff --git a/testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js.diff b/testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js.diff
deleted file mode 100644
index 436ef54919..0000000000
--- a/testdata/baselines/reference/submodule/compiler/indexedAccessWithFreshObjectLiteral.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.indexedAccessWithFreshObjectLiteral.js
-+++ new.indexedAccessWithFreshObjectLiteral.js
-@@= skipped -56, +56 lines =@@
-
-
- //// [indexedAccessWithFreshObjectLiteral.js]
--"use strict";
- function foo(id) {
-     return {
-         a: 1,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js b/testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js
index 7b68e7aef0..bcdf099afb 100644
--- a/testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js
+++ b/testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js
@@ -121,6 +121,7 @@ type Res3 = Example<never>;  // never
 
 
 //// [indexingTypesWithNever.js]
+"use strict";
 // Should be never
 const result3 = genericFn1({ c: "ctest", d: "dtest" });
 // Should be never
diff --git a/testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js.diff b/testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js.diff
deleted file mode 100644
index 0f15a0403c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/indexingTypesWithNever.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.indexingTypesWithNever.js
-+++ new.indexingTypesWithNever.js
-@@= skipped -120, +120 lines =@@
-
-
- //// [indexingTypesWithNever.js]
--"use strict";
- // Should be never
- const result3 = genericFn1({ c: "ctest", d: "dtest" });
- // Should be never
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js b/testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js
index f03eabd0de..0f98e917d4 100644
--- a/testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js
+++ b/testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js
@@ -27,5 +27,6 @@ const myPrimitiveTupleNew: [string, number] = extractPrimitivesNew({ primitive:
 
 
 //// [inferRestArgumentsMappedTuple.js]
+"use strict";
 const myPrimitiveTupleOld = extractPrimitivesOld({ primitive: "" }, { primitive: 0 });
 const myPrimitiveTupleNew = extractPrimitivesNew({ primitive: "" }, { primitive: 0 });
diff --git a/testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js.diff b/testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js.diff
deleted file mode 100644
index 4cd9ba6912..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferRestArgumentsMappedTuple.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.inferRestArgumentsMappedTuple.js
-+++ new.inferRestArgumentsMappedTuple.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [inferRestArgumentsMappedTuple.js]
--"use strict";
- const myPrimitiveTupleOld = extractPrimitivesOld({ primitive: "" }, { primitive: 0 });
- const myPrimitiveTupleNew = extractPrimitivesNew({ primitive: "" }, { primitive: 0 });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js b/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js
index 7b99077c69..4f0fd4f8f0 100644
--- a/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js
+++ b/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js
@@ -41,6 +41,7 @@ m.child; // ok
 
 
 //// [inferTypeParameterConstraints.js]
+"use strict";
 // Repro from #42636
 // https://github.com/microsoft/TypeScript/issues/57286#issuecomment-1927920336
 class BaseClass {
diff --git a/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js.diff b/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js.diff
index 5b15a9e6b9..9971f7bc0a 100644
--- a/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/inferTypeParameterConstraints.js.diff
@@ -1,14 +1,6 @@
 --- old.inferTypeParameterConstraints.js
 +++ new.inferTypeParameterConstraints.js
-@@= skipped -40, +40 lines =@@
-
-
- //// [inferTypeParameterConstraints.js]
--"use strict";
- // Repro from #42636
- // https://github.com/microsoft/TypeScript/issues/57286#issuecomment-1927920336
- class BaseClass {
-@@= skipped -9, +8 lines =@@
+@@= skipped -49, +49 lines =@@
      }
  }
  class Klass extends BaseClass {
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js b/testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js
index 74b31690e6..11fd9c2e13 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js
@@ -34,6 +34,7 @@ function flatMapChildren2<T>(node: Node, cb: (child: Node) => readonly T[] | T |
 
 
 //// [inferenceDoesNotAddUndefinedOrNull.js]
+"use strict";
 function flatMapChildren(node, cb) {
     const result = [];
     node.forEachChild(child => {
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js.diff
deleted file mode 100644
index e1171aedfc..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceDoesNotAddUndefinedOrNull.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferenceDoesNotAddUndefinedOrNull.js
-+++ new.inferenceDoesNotAddUndefinedOrNull.js
-@@= skipped -33, +33 lines =@@
-
-
- //// [inferenceDoesNotAddUndefinedOrNull.js]
--"use strict";
- function flatMapChildren(node, cb) {
-     const result = [];
-     node.forEachChild(child => {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js b/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js
index 556e627a49..2ee9e3421c 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js
@@ -56,6 +56,7 @@ type T2 = GetT1<StructuralVersion>; // number
 
 
 //// [inferenceErasedSignatures.js]
+"use strict";
 // Repro from #37163
 class SomeAbstractClass extends SomeBaseClass {
     foo;
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js.diff
index 90e89856c6..71ac68b6fa 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/inferenceErasedSignatures.js.diff
@@ -1,10 +1,8 @@
 --- old.inferenceErasedSignatures.js
 +++ new.inferenceErasedSignatures.js
-@@= skipped -55, +55 lines =@@
-
-
+@@= skipped -57, +57 lines =@@
  //// [inferenceErasedSignatures.js]
--"use strict";
+ "use strict";
  // Repro from #37163
 -var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
 -    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js b/testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js
index b2e7c48bd7..5991fdec6d 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js
@@ -15,5 +15,6 @@ Component({items: [{name:' string'}], itemKey: 'name' });
 
 
 //// [inferenceFromIncompleteSource.js]
+"use strict";
 // Repro from #42030
 Component({ items: [{ name: ' string' }], itemKey: 'name' });
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js.diff
deleted file mode 100644
index 6abf1807cb..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceFromIncompleteSource.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.inferenceFromIncompleteSource.js
-+++ new.inferenceFromIncompleteSource.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [inferenceFromIncompleteSource.js]
--"use strict";
- // Repro from #42030
- Component({ items: [{ name: ' string' }], itemKey: 'name' });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js b/testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js
index c9e45620a4..98babac9f5 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js
@@ -36,6 +36,7 @@ equal(v as string & { tag: 'foo' } | undefined, v as string);
 
 
 //// [inferenceOfNullableObjectTypesWithCommonBase.js]
+"use strict";
 function equal(a, b) { }
 let v = null;
 equal(v, v);
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js.diff
deleted file mode 100644
index 3cc48e4afe..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceOfNullableObjectTypesWithCommonBase.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferenceOfNullableObjectTypesWithCommonBase.js
-+++ new.inferenceOfNullableObjectTypesWithCommonBase.js
-@@= skipped -35, +35 lines =@@
-
-
- //// [inferenceOfNullableObjectTypesWithCommonBase.js]
--"use strict";
- function equal(a, b) { }
- let v = null;
- equal(v, v);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js b/testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js
index f890e3de6a..3f283402a0 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js
@@ -29,6 +29,7 @@ var v6: { a: string, b: string | undefined };
 
 
 //// [inferenceOptionalProperties.js]
+"use strict";
 const y1 = test(x1);
 const y2 = test(x2);
 var v1;
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js.diff
deleted file mode 100644
index f6f5b4c989..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceOptionalProperties.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferenceOptionalProperties.js
-+++ new.inferenceOptionalProperties.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [inferenceOptionalProperties.js]
--"use strict";
- const y1 = test(x1);
- const y2 = test(x2);
- var v1;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js b/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js
index 9415bed6b4..8932a279a8 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js
@@ -29,6 +29,7 @@ var v6: { a: string, b: string | undefined };
 
 
 //// [inferenceOptionalPropertiesStrict.js]
+"use strict";
 const y1 = test(x1);
 const y2 = test(x2);
 var v1;
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js.diff
deleted file mode 100644
index fb8998eacf..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesStrict.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferenceOptionalPropertiesStrict.js
-+++ new.inferenceOptionalPropertiesStrict.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [inferenceOptionalPropertiesStrict.js]
--"use strict";
- const y1 = test(x1);
- const y2 = test(x2);
- var v1;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js b/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js
index b202273a6a..0ee331c144 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js
@@ -28,6 +28,7 @@ const query = Object.entries(obj).map(
 
 
 //// [inferenceOptionalPropertiesToIndexSignatures.js]
+"use strict";
 let a1 = foo(x1); // string | number
 let a2 = foo(x2); // string | number | undefined
 let a3 = foo(x3); // string | number
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js.diff
deleted file mode 100644
index 9403921579..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceOptionalPropertiesToIndexSignatures.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferenceOptionalPropertiesToIndexSignatures.js
-+++ new.inferenceOptionalPropertiesToIndexSignatures.js
-@@= skipped -27, +27 lines =@@
-
-
- //// [inferenceOptionalPropertiesToIndexSignatures.js]
--"use strict";
- let a1 = foo(x1); // string | number
- let a2 = foo(x2); // string | number | undefined
- let a3 = foo(x3); // string | number
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js b/testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js
index 24b83f9ba4..309c9c3049 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js
@@ -21,6 +21,7 @@ zz.push(logLength(42));  // no error; T is inferred as `any`
 zz = logFirstLength([42]);  // no error; T is inferred as `any[]`
 
 //// [inferenceShouldFailOnEvolvingArrays.js]
+"use strict";
 // repro from https://github.com/Microsoft/TypeScript/issues/25675
 // The type of `arg` blocks inference but simplifies to T.
 function logLength(arg) {
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js.diff
deleted file mode 100644
index f5f285ddd1..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceShouldFailOnEvolvingArrays.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferenceShouldFailOnEvolvingArrays.js
-+++ new.inferenceShouldFailOnEvolvingArrays.js
-@@= skipped -20, +20 lines =@@
- zz = logFirstLength([42]);  // no error; T is inferred as `any[]`
-
- //// [inferenceShouldFailOnEvolvingArrays.js]
--"use strict";
- // repro from https://github.com/Microsoft/TypeScript/issues/25675
- // The type of `arg` blocks inference but simplifies to T.
- function logLength(arg) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js b/testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js
index a9ddfdee55..f3dc967cd1 100644
--- a/testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js
+++ b/testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js
@@ -19,6 +19,7 @@ const test: RowRenderer<Entity> = {
 
 
 //// [inferenceUnionOfObjectsMappedContextualType.js]
+"use strict";
 const test = {
     key: 'someDate',
     caption: 'My Date',
diff --git a/testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js.diff b/testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js.diff
deleted file mode 100644
index 5e6da2c637..0000000000
--- a/testdata/baselines/reference/submodule/compiler/inferenceUnionOfObjectsMappedContextualType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferenceUnionOfObjectsMappedContextualType.js
-+++ new.inferenceUnionOfObjectsMappedContextualType.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [inferenceUnionOfObjectsMappedContextualType.js]
--"use strict";
- const test = {
-     key: 'someDate',
-     caption: 'My Date',
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js b/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js
index d1ffb0cc77..1d9c86ac69 100644
--- a/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js
+++ b/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js
@@ -36,6 +36,7 @@ class Bar {
 
 
 //// [initializerWithThisPropertyAccess.js]
+"use strict";
 class A {
     a;
     b = this.a; // Error
diff --git a/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js.diff b/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js.diff
index 8148ce045f..a3cb0f2fdb 100644
--- a/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/initializerWithThisPropertyAccess.js.diff
@@ -1,10 +1,8 @@
 --- old.initializerWithThisPropertyAccess.js
 +++ new.initializerWithThisPropertyAccess.js
-@@= skipped -35, +35 lines =@@
-
-
+@@= skipped -37, +37 lines =@@
  //// [initializerWithThisPropertyAccess.js]
--"use strict";
+ "use strict";
  class A {
 +    a;
 +    b = this.a; // Error
@@ -48,7 +46,7 @@
  }
 
 
-@@= skipped -51, +46 lines =@@
+@@= skipped -49, +45 lines =@@
  }
  declare class Foo {
      private bar;
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js b/testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js
index 74100e2f4b..02a834fc56 100644
--- a/testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js
+++ b/testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js
@@ -22,6 +22,7 @@ function test<T extends object>(value: T): Test {
 
 
 //// [intersectionPropertyCheck.js]
+"use strict";
 let obj = { a: { x: 'hello', y: 2 }, c: 5 }; // Nested excess property
 let weak = wrong; // Nested weak object type
 function foo(x, y) {
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js.diff b/testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js.diff
deleted file mode 100644
index 94359d3969..0000000000
--- a/testdata/baselines/reference/submodule/compiler/intersectionPropertyCheck.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionPropertyCheck.js
-+++ new.intersectionPropertyCheck.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [intersectionPropertyCheck.js]
--"use strict";
- let obj = { a: { x: 'hello', y: 2 }, c: 5 }; // Nested excess property
- let weak = wrong; // Nested weak object type
- function foo(x, y) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js b/testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js
index 8986300f43..f345160ad9 100644
--- a/testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js
+++ b/testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js
@@ -20,6 +20,7 @@ const mySecondFunction = <T extends { commonProperty: number, otherProperty: num
 
 
 //// [intersectionSatisfiesConstraint.js]
+"use strict";
 const myFirstFunction = (param1) => {
     const newParam = Object.assign(param1, { otherProperty: 3 });
     mySecondFunction(newParam);
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js.diff b/testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js.diff
deleted file mode 100644
index 0d6173edf0..0000000000
--- a/testdata/baselines/reference/submodule/compiler/intersectionSatisfiesConstraint.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionSatisfiesConstraint.js
-+++ new.intersectionSatisfiesConstraint.js
-@@= skipped -19, +19 lines =@@
-
-
- //// [intersectionSatisfiesConstraint.js]
--"use strict";
- const myFirstFunction = (param1) => {
-     const newParam = Object.assign(param1, { otherProperty: 3 });
-     mySecondFunction(newParam);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js b/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js
index 46e88b6ea8..a2b5d30478 100644
--- a/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js
+++ b/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js
@@ -60,6 +60,7 @@ class Foo {
 
 
 //// [intersectionWithConflictingPrivates.js]
+"use strict";
 class A {
     x;
     y;
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js.diff b/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js.diff
index 4f070275ae..f3ab771060 100644
--- a/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/intersectionWithConflictingPrivates.js.diff
@@ -1,10 +1,8 @@
 --- old.intersectionWithConflictingPrivates.js
 +++ new.intersectionWithConflictingPrivates.js
-@@= skipped -59, +59 lines =@@
-
-
+@@= skipped -61, +61 lines =@@
  //// [intersectionWithConflictingPrivates.js]
--"use strict";
+ "use strict";
  class A {
 +    x;
 +    y;
@@ -15,7 +13,7 @@
  }
  ab.y = 'hello';
  ab = {};
-@@= skipped -24, +27 lines =@@
+@@= skipped -22, +26 lines =@@
  class ViewRefFileNode extends ViewRefNode {
  }
  class CommitFileNode extends ViewRefFileNode {
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js b/testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js
index 0634e19246..e19a218e42 100644
--- a/testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js
+++ b/testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js
@@ -30,6 +30,7 @@ const xx: [number, ...number[]] = yy;
 
 
 //// [intersectionsAndOptionalProperties.js]
+"use strict";
 x = y; // Error
 x = z; // Error
 function foo(v) {
diff --git a/testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js.diff b/testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js.diff
deleted file mode 100644
index cab7556f54..0000000000
--- a/testdata/baselines/reference/submodule/compiler/intersectionsAndOptionalProperties.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionsAndOptionalProperties.js
-+++ new.intersectionsAndOptionalProperties.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [intersectionsAndOptionalProperties.js]
--"use strict";
- x = y; // Error
- x = z; // Error
- function foo(v) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js b/testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js
index b2dadd9537..a26daf934a 100644
--- a/testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js
+++ b/testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js
@@ -26,6 +26,7 @@ interface Constraint<A extends Runtype<any>> extends Runtype<A['witness']> {
 
 
 //// [invariantGenericErrorElaboration.js]
+"use strict";
 // Repro from #19746
 const wat = Num;
 const Foo = Obj({ foo: Num });
diff --git a/testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js.diff b/testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js.diff
deleted file mode 100644
index 2ff68549ec..0000000000
--- a/testdata/baselines/reference/submodule/compiler/invariantGenericErrorElaboration.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.invariantGenericErrorElaboration.js
-+++ new.invariantGenericErrorElaboration.js
-@@= skipped -25, +25 lines =@@
-
-
- //// [invariantGenericErrorElaboration.js]
--"use strict";
- // Repro from #19746
- const wat = Num;
- const Foo = Obj({ foo: Num });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js b/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js
index 95fbefe14b..ab579cc40e 100644
--- a/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js
+++ b/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js
@@ -49,6 +49,7 @@ enum StrExt {
 }
 
 //// [isolatedDeclarationErrorsEnums.js]
+"use strict";
 var E;
 (function (E) {
     E["A"] = computed(0);
diff --git a/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js.diff b/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js.diff
index edb7121bca..e9658fda0b 100644
--- a/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/isolatedDeclarationErrorsEnums.js.diff
@@ -1,10 +1,7 @@
 --- old.isolatedDeclarationErrorsEnums.js
 +++ new.isolatedDeclarationErrorsEnums.js
-@@= skipped -48, +48 lines =@@
- }
-
- //// [isolatedDeclarationErrorsEnums.js]
--"use strict";
+@@= skipped -51, +51 lines =@@
+ "use strict";
  var E;
  (function (E) {
 -    E[E["A"] = computed(0)] = "A";
@@ -31,7 +28,7 @@
  })(F || (F = {}));
  var Flag;
  (function (Flag) {
-@@= skipped -26, +31 lines =@@
+@@= skipped -23, +29 lines =@@
  var ExtFlags;
  (function (ExtFlags) {
      ExtFlags[ExtFlags["D"] = 2] = "D";
diff --git a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js b/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js
index 51f6b41f09..9a58042032 100644
--- a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js
+++ b/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js
@@ -49,6 +49,7 @@ class MyMap implements Map<string, number> {
 
 
 //// [iterableTReturnTNext.js]
+"use strict";
 // based on:
 // - https://github.com/apollographql/apollo-client/blob/8740f198805a99e01136617c4055d611b92cc231/src/react/hooks/__tests__/useMutation.test.tsx#L2328
 // - https://github.com/continuedev/continue/blob/046bca088a833f8b3620412ff64e4b6f41fbb959/extensions/vscode/src/autocomplete/lsp.ts#L60
diff --git a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js.diff b/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js.diff
deleted file mode 100644
index 543c57e4ed..0000000000
--- a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=false).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.iterableTReturnTNext(strictbuiltiniteratorreturn=false).js
-+++ new.iterableTReturnTNext(strictbuiltiniteratorreturn=false).js
-@@= skipped -48, +48 lines =@@
-
-
- //// [iterableTReturnTNext.js]
--"use strict";
- // based on:
- // - https://github.com/apollographql/apollo-client/blob/8740f198805a99e01136617c4055d611b92cc231/src/react/hooks/__tests__/useMutation.test.tsx#L2328
- // - https://github.com/continuedev/continue/blob/046bca088a833f8b3620412ff64e4b6f41fbb959/extensions/vscode/src/autocomplete/lsp.ts#L60
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js b/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js
index 51f6b41f09..9a58042032 100644
--- a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js
+++ b/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js
@@ -49,6 +49,7 @@ class MyMap implements Map<string, number> {
 
 
 //// [iterableTReturnTNext.js]
+"use strict";
 // based on:
 // - https://github.com/apollographql/apollo-client/blob/8740f198805a99e01136617c4055d611b92cc231/src/react/hooks/__tests__/useMutation.test.tsx#L2328
 // - https://github.com/continuedev/continue/blob/046bca088a833f8b3620412ff64e4b6f41fbb959/extensions/vscode/src/autocomplete/lsp.ts#L60
diff --git a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js.diff b/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js.diff
deleted file mode 100644
index 40bd0ecdec..0000000000
--- a/testdata/baselines/reference/submodule/compiler/iterableTReturnTNext(strictbuiltiniteratorreturn=true).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.iterableTReturnTNext(strictbuiltiniteratorreturn=true).js
-+++ new.iterableTReturnTNext(strictbuiltiniteratorreturn=true).js
-@@= skipped -48, +48 lines =@@
-
-
- //// [iterableTReturnTNext.js]
--"use strict";
- // based on:
- // - https://github.com/apollographql/apollo-client/blob/8740f198805a99e01136617c4055d611b92cc231/src/react/hooks/__tests__/useMutation.test.tsx#L2328
- // - https://github.com/continuedev/continue/blob/046bca088a833f8b3620412ff64e4b6f41fbb959/extensions/vscode/src/autocomplete/lsp.ts#L60
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js b/testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js
index d434ef7198..f7b1c2fcf8 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js
@@ -13,6 +13,7 @@ const a = (
 
 
 //// [index.js]
+"use strict";
 /// <reference path="react18/react18.d.ts" />
 /// <reference path="react18/global.d.ts" />
 const a = (React.createElement("main", null,
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js.diff b/testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js.diff
deleted file mode 100644
index df3d91292e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/jsxChildWrongType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.jsxChildWrongType.js
-+++ new.jsxChildWrongType.js
-@@= skipped -12, +12 lines =@@
-
-
- //// [index.js]
--"use strict";
- /// <reference path="react18/react18.d.ts" />
- /// <reference path="react18/global.d.ts" />
- const a = (React.createElement("main", null,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js b/testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js
index a01e4ceeae..be8a7dd9cf 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js
@@ -18,6 +18,7 @@ const b = (
 );
 
 //// [index.js]
+"use strict";
 /// <reference path="react18/react18.d.ts" />
 /// <reference path="react18/global.d.ts" />
 const b = (React.createElement(Foo, null,
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js.diff b/testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js.diff
deleted file mode 100644
index d2845cf221..0000000000
--- a/testdata/baselines/reference/submodule/compiler/jsxChildrenArrayWrongType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.jsxChildrenArrayWrongType.js
-+++ new.jsxChildrenArrayWrongType.js
-@@= skipped -17, +17 lines =@@
- );
-
- //// [index.js]
--"use strict";
- /// <reference path="react18/react18.d.ts" />
- /// <reference path="react18/global.d.ts" />
- const b = (React.createElement(Foo, null,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js b/testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js
index d83e1ba831..003aef6a08 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js
@@ -25,6 +25,7 @@ const argchild = <ElemLit prop="x">{p => "y"}</ElemLit>
 const mismatched = <ElemLit prop="x">{() => 12}</ElemLit>
 
 //// [jsxChildrenGenericContextualTypes.jsx]
+"use strict";
 const Elem = (p) => <div></div>;
 Elem({ prop: { a: "x" }, children: i => ({ a: "z" }) });
 const q = <Elem prop={{ a: "x" }} children={i => ({ a: "z" })}/>;
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js.diff b/testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js.diff
deleted file mode 100644
index f570d9e0ed..0000000000
--- a/testdata/baselines/reference/submodule/compiler/jsxChildrenGenericContextualTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.jsxChildrenGenericContextualTypes.js
-+++ new.jsxChildrenGenericContextualTypes.js
-@@= skipped -24, +24 lines =@@
- const mismatched = <ElemLit prop="x">{() => 12}</ElemLit>
-
- //// [jsxChildrenGenericContextualTypes.jsx]
--"use strict";
- const Elem = (p) => <div></div>;
- Elem({ prop: { a: "x" }, children: i => ({ a: "z" }) });
- const q = <Elem prop={{ a: "x" }} children={i => ({ a: "z" })}/>;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js b/testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js
index 4ae637d1c4..105528019f 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js
@@ -17,6 +17,7 @@ const b = (
 );
 
 //// [other.js]
+"use strict";
 /// <reference path="react18/react18.d.ts" />
 /// <reference path="react18/global.d.ts" />
 const b = (React.createElement(Foo, null,
diff --git a/testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js.diff b/testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js.diff
deleted file mode 100644
index 130688bec5..0000000000
--- a/testdata/baselines/reference/submodule/compiler/jsxChildrenWrongType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.jsxChildrenWrongType.js
-+++ new.jsxChildrenWrongType.js
-@@= skipped -16, +16 lines =@@
- );
-
- //// [other.js]
--"use strict";
- /// <reference path="react18/react18.d.ts" />
- /// <reference path="react18/global.d.ts" />
- const b = (React.createElement(Foo, null,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js b/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js
index 5a46f01ece..15cf5b343c 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js
@@ -42,6 +42,7 @@ const elem6 = <obj. MemberClassComponent />;
 
 
 //// [jsxComponentTypeErrors.jsx]
+"use strict";
 function FunctionComponent({ type }) {
     return {
         type
diff --git a/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js.diff b/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js.diff
index 4ce429b405..9ffd36fa50 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/jsxComponentTypeErrors.js.diff
@@ -1,14 +1,6 @@
 --- old.jsxComponentTypeErrors.js
 +++ new.jsxComponentTypeErrors.js
-@@= skipped -41, +41 lines =@@
-
-
- //// [jsxComponentTypeErrors.jsx]
--"use strict";
- function FunctionComponent({ type }) {
-     return {
-         type
-@@= skipped -10, +9 lines =@@
+@@= skipped -51, +51 lines =@@
      return <this type="foo"/>;
  };
  class ClassComponent {
diff --git a/testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js b/testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js
index 23b8bedbef..163d4d1aa9 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js
@@ -23,6 +23,7 @@ function NoticeList(props: Props) {
 </NoticeList>;
 
 //// [jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.jsx]
+"use strict";
 function NoticeList(props) {
     return null;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js.diff b/testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js.diff
deleted file mode 100644
index 0b5907b8e8..0000000000
--- a/testdata/baselines/reference/submodule/compiler/jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js
-+++ new.jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.js
-@@= skipped -22, +22 lines =@@
- </NoticeList>;
-
- //// [jsxContainsOnlyTriviaWhiteSpacesNotCountedAsChild.jsx]
--"use strict";
- function NoticeList(props) {
-     return null;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js b/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js
index 39e44df363..c2ed65ac55 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js
@@ -19,6 +19,7 @@ class ElemClass<T extends {x: number}> implements JSX.ElementClass {
 const elem = <ElemClass x={12} y={24} />
 
 //// [jsxElementClassTooManyParams.jsx]
+"use strict";
 class ElemClass {
     props;
     constructor(props) {
diff --git a/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js.diff b/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js.diff
index 2cd0bb4f1a..10b7d42fa8 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/jsxElementClassTooManyParams.js.diff
@@ -1,10 +1,8 @@
 --- old.jsxElementClassTooManyParams.js
 +++ new.jsxElementClassTooManyParams.js
-@@= skipped -18, +18 lines =@@
- const elem = <ElemClass x={12} y={24} />
-
+@@= skipped -20, +20 lines =@@
  //// [jsxElementClassTooManyParams.jsx]
--"use strict";
+ "use strict";
  class ElemClass {
 +    props;
      constructor(props) {
diff --git a/testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js b/testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js
index 7c3ecfb686..3d93b20c1f 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js
@@ -18,6 +18,7 @@ function B() {
 
 
 //// [a.js]
+"use strict";
 function A() {
     return React.createElement("package", null);
 }
diff --git a/testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js.diff b/testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js.diff
deleted file mode 100644
index 8f8f318dd6..0000000000
--- a/testdata/baselines/reference/submodule/compiler/jsxElementsAsIdentifierNames.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.jsxElementsAsIdentifierNames.js
-+++ new.jsxElementsAsIdentifierNames.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [a.js]
--"use strict";
- function A() {
-     return React.createElement("package", null);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js b/testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js
index 05222697a5..1ae3253789 100644
--- a/testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js
+++ b/testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js
@@ -11,6 +11,7 @@ const jsxWithReactFragment = <React.Fragment>{test}</React.Fragment>;
 
 
 //// [a.js]
+"use strict";
 /// <reference path="react18/react18.d.ts" />
 /// <reference path="react18/global.d.ts" />
 const test = () => "asd";
diff --git a/testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js.diff b/testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js.diff
deleted file mode 100644
index eb2d2a3bc6..0000000000
--- a/testdata/baselines/reference/submodule/compiler/jsxFragmentWrongType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.jsxFragmentWrongType.js
-+++ new.jsxFragmentWrongType.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [a.js]
--"use strict";
- /// <reference path="react18/react18.d.ts" />
- /// <reference path="react18/global.d.ts" />
- const test = () => "asd";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js b/testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js
index 64fd94c8ae..ea96f966f6 100644
--- a/testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js
+++ b/testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js
@@ -9,6 +9,7 @@ type Q = keyof typeof obj;
 
 
 //// [keyofObjectWithGlobalSymbolIncluded.js]
+"use strict";
 const obj = {
     [Symbol.species]: Array
 };
diff --git a/testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js.diff b/testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js.diff
deleted file mode 100644
index 6bc6b8febc..0000000000
--- a/testdata/baselines/reference/submodule/compiler/keyofObjectWithGlobalSymbolIncluded.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.keyofObjectWithGlobalSymbolIncluded.js
-+++ new.keyofObjectWithGlobalSymbolIncluded.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [keyofObjectWithGlobalSymbolIncluded.js]
--"use strict";
- const obj = {
-     [Symbol.species]: Array
- };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js b/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js
index 60c5e95f98..5a00458d0d 100644
--- a/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js
+++ b/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js
@@ -24,6 +24,7 @@ consumeClass(createClass((str, _unused_num) => console.log(str.length)));
 
 
 //// [lambdaParameterWithTupleArgsHasCorrectAssignability.js]
+"use strict";
 class GenericClass {
     from;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js.diff b/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js.diff
index 6758128600..42f98b2e10 100644
--- a/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/lambdaParameterWithTupleArgsHasCorrectAssignability.js.diff
@@ -1,10 +1,8 @@
 --- old.lambdaParameterWithTupleArgsHasCorrectAssignability.js
 +++ new.lambdaParameterWithTupleArgsHasCorrectAssignability.js
-@@= skipped -23, +23 lines =@@
-
-
+@@= skipped -25, +25 lines =@@
  //// [lambdaParameterWithTupleArgsHasCorrectAssignability.js]
--"use strict";
+ "use strict";
  class GenericClass {
 +    from;
  }
diff --git a/testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js b/testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js
index 4cf86b5806..3bf4d99f36 100644
--- a/testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js
+++ b/testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js
@@ -10007,6 +10007,7 @@ data[0] = 0;
 
 
 //// [largeControlFlowGraph.js]
+"use strict";
 // The control flow graph for the following statement block is 10000 nodes deep. Check that
 // we gracefully handle this, possibly by issuing an error.
 const data = [];
diff --git a/testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js.diff b/testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js.diff
deleted file mode 100644
index a64a88b3b2..0000000000
--- a/testdata/baselines/reference/submodule/compiler/largeControlFlowGraph.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.largeControlFlowGraph.js
-+++ new.largeControlFlowGraph.js
-@@= skipped -10006, +10006 lines =@@
-
-
- //// [largeControlFlowGraph.js]
--"use strict";
- // The control flow graph for the following statement block is 10000 nodes deep. Check that
- // we gracefully handle this, possibly by issuing an error.
- const data = [];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/mapConstructor.js b/testdata/baselines/reference/submodule/compiler/mapConstructor.js
index eb89adb056..fdf938e2c7 100644
--- a/testdata/baselines/reference/submodule/compiler/mapConstructor.js
+++ b/testdata/baselines/reference/submodule/compiler/mapConstructor.js
@@ -10,6 +10,7 @@ const potentiallyNullIterable = [['1', 1], ['2', 2]] as Iterable<[string, number
 new Map(potentiallyNullIterable);
 
 //// [mapConstructor.js]
+"use strict";
 new Map();
 const potentiallyUndefinedIterable = [['1', 1], ['2', 2]];
 new Map(potentiallyUndefinedIterable);
diff --git a/testdata/baselines/reference/submodule/compiler/mapConstructor.js.diff b/testdata/baselines/reference/submodule/compiler/mapConstructor.js.diff
deleted file mode 100644
index d20277b85a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/mapConstructor.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mapConstructor.js
-+++ new.mapConstructor.js
-@@= skipped -9, +9 lines =@@
- new Map(potentiallyNullIterable);
-
- //// [mapConstructor.js]
--"use strict";
- new Map();
- const potentiallyUndefinedIterable = [['1', 1], ['2', 2]];
- new Map(potentiallyUndefinedIterable);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js b/testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js
index e5ac4f26c5..36584fa24a 100644
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js
+++ b/testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js
@@ -35,3 +35,4 @@ type Bar3<IdentifierT extends Record<PropertyKey, PropertyKey>, T> =
 
 
 //// [mappedTypeAndIndexSignatureRelation.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js.diff b/testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js.diff
deleted file mode 100644
index 7f949e9302..0000000000
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeAndIndexSignatureRelation.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.mappedTypeAndIndexSignatureRelation.js
-+++ new.mappedTypeAndIndexSignatureRelation.js
-@@= skipped -34, +34 lines =@@
-
-
- //// [mappedTypeAndIndexSignatureRelation.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js b/testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js
index 35f7b3380f..a87811d942 100644
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js
+++ b/testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js
@@ -26,6 +26,7 @@ mapped8({foo: s => 42});
 mapped9({foo: s => 42});
 
 //// [mappedTypeContextualTypesApplied.js]
+"use strict";
 mapped1({ foo: s => 42 });
 mapped2({ foo: s => 42 });
 mapped3({ foo: s => 42 });
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js.diff b/testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js.diff
deleted file mode 100644
index 77ef8fd3b1..0000000000
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeContextualTypesApplied.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypeContextualTypesApplied.js
-+++ new.mappedTypeContextualTypesApplied.js
-@@= skipped -25, +25 lines =@@
- mapped9({foo: s => 42});
-
- //// [mappedTypeContextualTypesApplied.js]
--"use strict";
- mapped1({ foo: s => 42 });
- mapped2({ foo: s => 42 });
- mapped3({ foo: s => 42 });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js b/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js
index e0cb4c8339..02a33de425 100644
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js
+++ b/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js
@@ -47,6 +47,7 @@ const onSomeEvent = <T extends keyof TypesMap>(p: P<T>) =>
 
 
 //// [mappedTypeGenericIndexedAccess.js]
+"use strict";
 // Repro from #49242
 class Test {
     entries;
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js.diff b/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js.diff
index e231cfa770..73c0f3072b 100644
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/mappedTypeGenericIndexedAccess.js.diff
@@ -1,17 +1,14 @@
 --- old.mappedTypeGenericIndexedAccess.js
 +++ new.mappedTypeGenericIndexedAccess.js
-@@= skipped -46, +46 lines =@@
-
-
- //// [mappedTypeGenericIndexedAccess.js]
--"use strict";
+@@= skipped -49, +49 lines =@@
+ "use strict";
  // Repro from #49242
  class Test {
 +    entries;
      constructor() {
          this.entries = {};
      }
-@@= skipped -18, +18 lines =@@
+@@= skipped -15, +16 lines =@@
      [0]: (p) => console.log(p.foo),
      [1]: (p) => console.log(p.a),
  };
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js b/testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js
index 5db211fd58..eafd924504 100644
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js
+++ b/testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js
@@ -31,6 +31,7 @@ let pair2: Pairs<FooBar>[keyof FooBar] = {
 
 
 //// [mappedTypeIndexedAccess.js]
+"use strict";
 // Repro from #15756
 // Error expected here
 let pair1 = {
diff --git a/testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js.diff b/testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js.diff
deleted file mode 100644
index a78abeae77..0000000000
--- a/testdata/baselines/reference/submodule/compiler/mappedTypeIndexedAccess.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypeIndexedAccess.js
-+++ new.mappedTypeIndexedAccess.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [mappedTypeIndexedAccess.js]
--"use strict";
- // Repro from #15756
- // Error expected here
- let pair1 = {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js b/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js
index e16dd29f42..e13412ddb1 100644
--- a/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js
+++ b/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js
@@ -42,6 +42,7 @@ someNumber > E2.C1;
 
 
 //// [mixedTypeEnumComparison.js]
+"use strict";
 if (someNumber > 25 /* E.N2 */) {
     someNumber = 25 /* E.N2 */;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js.diff b/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js.diff
index a6d66c1ef7..3cbee3f35d 100644
--- a/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/mixedTypeEnumComparison.js.diff
@@ -1,14 +1,6 @@
 --- old.mixedTypeEnumComparison.js
 +++ new.mixedTypeEnumComparison.js
-@@= skipped -41, +41 lines =@@
-
-
- //// [mixedTypeEnumComparison.js]
--"use strict";
- if (someNumber > 25 /* E.N2 */) {
-     someNumber = 25 /* E.N2 */;
- }
-@@= skipped -14, +13 lines =@@
+@@= skipped -55, +55 lines =@@
  (function (E2) {
      E2["S1"] = "foo";
      E2[E2["N1"] = 1000] = "N1";
diff --git a/testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js b/testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js
index 270ecaec64..06d7bad61b 100644
--- a/testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js
+++ b/testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js
@@ -28,6 +28,7 @@ const r2 = Moon({
 
 
 //// [multipleInferenceContexts.js]
+"use strict";
 const r2 = Moon({
     data: { msg: "" },
     render() {
diff --git a/testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js.diff b/testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js.diff
deleted file mode 100644
index 62f828f5a1..0000000000
--- a/testdata/baselines/reference/submodule/compiler/multipleInferenceContexts.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.multipleInferenceContexts.js
-+++ new.multipleInferenceContexts.js
-@@= skipped -27, +27 lines =@@
-
-
- //// [multipleInferenceContexts.js]
--"use strict";
- const r2 = Moon({
-     data: { msg: "" },
-     render() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowByEquality.js b/testdata/baselines/reference/submodule/compiler/narrowByEquality.js
index 2ddc91df58..31e88dc25c 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowByEquality.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowByEquality.js
@@ -76,6 +76,7 @@ if (xUnknown != null) {
 
 
 //// [narrowByEquality.js]
+"use strict";
 if (x == n) {
     x;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/narrowByEquality.js.diff b/testdata/baselines/reference/submodule/compiler/narrowByEquality.js.diff
deleted file mode 100644
index 0887b322ba..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowByEquality.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowByEquality.js
-+++ new.narrowByEquality.js
-@@= skipped -75, +75 lines =@@
-
-
- //// [narrowByEquality.js]
--"use strict";
- if (x == n) {
-     x;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js b/testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js
index cdab0c3cda..176705cfa3 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js
@@ -73,6 +73,7 @@ function test(o: Person | Car) {
 
 
 //// [narrowByInstanceof.js]
+"use strict";
 function foo(x, A, B, AB) {
     if (x instanceof A) {
         x; // A
diff --git a/testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js.diff b/testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js.diff
deleted file mode 100644
index 568bd2488f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowByInstanceof.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowByInstanceof.js
-+++ new.narrowByInstanceof.js
-@@= skipped -72, +72 lines =@@
-
-
- //// [narrowByInstanceof.js]
--"use strict";
- function foo(x, A, B, AB) {
-     if (x instanceof A) {
-         x; // A
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js b/testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js
index a9dd8d73a2..3078c5a157 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js
@@ -318,6 +318,7 @@ function multipleGenericFuseWithBoth<X extends L | number, Y extends R | number>
 
 
 //// [narrowingByTypeofInSwitch.js]
+"use strict";
 function assertNever(x) {
     return x;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js.diff
deleted file mode 100644
index b6baa01312..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingByTypeofInSwitch.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingByTypeofInSwitch.js
-+++ new.narrowingByTypeofInSwitch.js
-@@= skipped -317, +317 lines =@@
-
-
- //// [narrowingByTypeofInSwitch.js]
--"use strict";
- function assertNever(x) {
-     return x;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js b/testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js
index dcbd8a4ba2..c27b7b6fa7 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js
@@ -145,6 +145,7 @@ function checksArrayOrObject2(obj: Record<string, any> | Record<string, any>[])
 
 
 //// [narrowingMutualSubtypes.js]
+"use strict";
 // Check that `any` is a strict supertype of `unknown`
 const a1a = [ru1, ra1]; // { [x: string]: any }[]
 const a1b = [ra1, ru1]; // { [x: string]: any }[]
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js.diff
deleted file mode 100644
index 4d9bdd5433..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingMutualSubtypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingMutualSubtypes.js
-+++ new.narrowingMutualSubtypes.js
-@@= skipped -144, +144 lines =@@
-
-
- //// [narrowingMutualSubtypes.js]
--"use strict";
- // Check that `any` is a strict supertype of `unknown`
- const a1a = [ru1, ra1]; // { [x: string]: any }[]
- const a1b = [ra1, ru1]; // { [x: string]: any }[]
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js b/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js
index 32ff28467f..ac27be6278 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js
@@ -94,6 +94,7 @@ while (target) {
 
 
 //// [narrowingOfDottedNames.js]
+"use strict";
 // Repro from #8383
 class A {
     prop;
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js.diff
index caee403a67..f8c159da7c 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/narrowingOfDottedNames.js.diff
@@ -1,10 +1,7 @@
 --- old.narrowingOfDottedNames.js
 +++ new.narrowingOfDottedNames.js
-@@= skipped -93, +93 lines =@@
-
-
- //// [narrowingOfDottedNames.js]
--"use strict";
+@@= skipped -96, +96 lines =@@
+ "use strict";
  // Repro from #8383
  class A {
 +    prop;
@@ -14,7 +11,7 @@
  }
  function isA(x) {
      return x instanceof A;
-@@= skipped -34, +35 lines =@@
+@@= skipped -31, +33 lines =@@
  }
  // Repro from #28100
  class Foo1 {
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js b/testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js
index 9d85e8c2ff..a8dc02c117 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js
@@ -89,6 +89,7 @@ function handleDogWorking(pet: Pet) {
 }
 
 //// [narrowingOfQualifiedNames.js]
+"use strict";
 // Repro from #43411
 function init(properties) {
     if (properties.foo) {
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js.diff
deleted file mode 100644
index 96f14aa958..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingOfQualifiedNames.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingOfQualifiedNames.js
-+++ new.narrowingOfQualifiedNames.js
-@@= skipped -88, +88 lines =@@
- }
-
- //// [narrowingOfQualifiedNames.js]
--"use strict";
- // Repro from #43411
- function init(properties) {
-     if (properties.foo) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js b/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js
index e39f511854..2a05523668 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js
@@ -35,6 +35,7 @@ if (a.stringOrUndefined) {
 
 
 //// [narrowingOrderIndependent.js]
+"use strict";
 // Repro from #36709
 class A {
     stringOrUndefined;
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js.diff
index 984f77c3ce..fec116eeda 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/narrowingOrderIndependent.js.diff
@@ -1,10 +1,7 @@
 --- old.narrowingOrderIndependent.js
 +++ new.narrowingOrderIndependent.js
-@@= skipped -34, +34 lines =@@
-
-
- //// [narrowingOrderIndependent.js]
--"use strict";
+@@= skipped -37, +37 lines =@@
+ "use strict";
  // Repro from #36709
  class A {
 +    stringOrUndefined;
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js b/testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js
index bafe897c2a..ac01c7f0ab 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js
@@ -33,6 +33,7 @@ function f1(x: unknown): any {
 
 
 //// [narrowingTruthyObject.js]
+"use strict";
 function foo(x, b) {
     if (typeof x === 'object') {
         x.toString();
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js.diff
deleted file mode 100644
index b89fd7805b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingTruthyObject.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingTruthyObject.js
-+++ new.narrowingTruthyObject.js
-@@= skipped -32, +32 lines =@@
-
-
- //// [narrowingTruthyObject.js]
--"use strict";
- function foo(x, b) {
-     if (typeof x === 'object') {
-         x.toString();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js b/testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js
index 764c44d01b..5c90df5fd3 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js
@@ -46,6 +46,7 @@ function booleanFixed(wrapped: WrappedStringOr<boolean> | null) {
 
 
 //// [narrowingTypeofDiscriminant.js]
+"use strict";
 function f1(obj) {
     if (typeof obj.kind === "string") {
         obj; // { kind: 'a', data: string }
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js.diff
deleted file mode 100644
index 14707105d2..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofDiscriminant.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingTypeofDiscriminant.js
-+++ new.narrowingTypeofDiscriminant.js
-@@= skipped -45, +45 lines =@@
-
-
- //// [narrowingTypeofDiscriminant.js]
--"use strict";
- function f1(obj) {
-     if (typeof obj.kind === "string") {
-         obj; // { kind: 'a', data: string }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js b/testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js
index 91103cf771..d5508be70d 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js
@@ -29,6 +29,7 @@ function f3(x: { _foo: number } & number) {
 }
 
 //// [narrowingTypeofFunction.js]
+"use strict";
 function f1(a) {
     if (typeof a === "function") {
         a;
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js.diff
deleted file mode 100644
index a0b1e45018..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofFunction.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingTypeofFunction.js
-+++ new.narrowingTypeofFunction.js
-@@= skipped -28, +28 lines =@@
- }
-
- //// [narrowingTypeofFunction.js]
--"use strict";
- function f1(a) {
-     if (typeof a === "function") {
-         a;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js b/testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js
index 4b7a36fbee..2a5306edf5 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js
@@ -16,6 +16,7 @@ function f1(x: F & { foo: number }) {
 }
 
 //// [narrowingTypeofObject.js]
+"use strict";
 function test(x) {
     if (typeof x === 'object') {
         x;
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js.diff
deleted file mode 100644
index 138c5bce0f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofObject.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingTypeofObject.js
-+++ new.narrowingTypeofObject.js
-@@= skipped -15, +15 lines =@@
- }
-
- //// [narrowingTypeofObject.js]
--"use strict";
- function test(x) {
-     if (typeof x === 'object') {
-         x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js b/testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js
index b1b8dc670f..b91a10e59c 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js
@@ -15,6 +15,7 @@ function fn<T extends Array<unknown> | undefined>(arg: T) {
 
 
 //// [narrowingTypeofUndefined2.js]
+"use strict";
 function fn(arg) {
     if (typeof arg !== "undefined") {
         takeArray(arg);
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js.diff
deleted file mode 100644
index b8bf387059..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingTypeofUndefined2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingTypeofUndefined2.js
-+++ new.narrowingTypeofUndefined2.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [narrowingTypeofUndefined2.js]
--"use strict";
- function fn(arg) {
-     if (typeof arg !== "undefined") {
-         takeArray(arg);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js b/testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js
index 70946dc0cb..58b87965ec 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js
@@ -14,6 +14,7 @@ function fx1(x: Variants) {
 
 
 //// [narrowingUnionToNeverAssigment.js]
+"use strict";
 function fx1(x) {
     if (x === "a" || x === "b") {
     }
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js.diff
deleted file mode 100644
index d107db0a80..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingUnionToNeverAssigment.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingUnionToNeverAssigment.js
-+++ new.narrowingUnionToNeverAssigment.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [narrowingUnionToNeverAssigment.js]
--"use strict";
- function fx1(x) {
-     if (x === "a" || x === "b") {
-     }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js b/testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js
index e547b028c4..1fd67649fb 100644
--- a/testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js
+++ b/testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js
@@ -266,6 +266,7 @@ function example3(value: Union): { type: 'a'; variant: 2 } | null {
 
 
 //// [narrowingUnionToUnion.js]
+"use strict";
 function fx1(x) {
     if (isFalsy(x)) {
         x; // "" | 0 | undefined
diff --git a/testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js.diff b/testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js.diff
deleted file mode 100644
index ecf0e0d863..0000000000
--- a/testdata/baselines/reference/submodule/compiler/narrowingUnionToUnion.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.narrowingUnionToUnion.js
-+++ new.narrowingUnionToUnion.js
-@@= skipped -265, +265 lines =@@
-
-
- //// [narrowingUnionToUnion.js]
--"use strict";
- function fx1(x) {
-     if (isFalsy(x)) {
-         x; // "" | 0 | undefined
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js b/testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js
index b6564c3ba1..c1dcebf100 100644
--- a/testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js
+++ b/testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js
@@ -9,4 +9,5 @@ declare let y: Cb<Cb<Cb<Cb<string>>>>;
 y = x;
 
 //// [nestedCallbackErrorNotFlattened.js]
+"use strict";
 y = x;
diff --git a/testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js.diff b/testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js.diff
deleted file mode 100644
index 00051e3054..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nestedCallbackErrorNotFlattened.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.nestedCallbackErrorNotFlattened.js
-+++ new.nestedCallbackErrorNotFlattened.js
-@@= skipped -8, +8 lines =@@
- y = x;
-
- //// [nestedCallbackErrorNotFlattened.js]
--"use strict";
- y = x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js b/testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js
index 15864efa11..9a5bcd9728 100644
--- a/testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js
+++ b/testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js
@@ -92,6 +92,7 @@ const TEST_VALUE: ExtendedValue = {
 
 
 //// [nestedExcessPropertyChecking.js]
+"use strict";
 const ab1 = {}; // Error
 const ab2 = {}; // Error
 var E;
diff --git a/testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js.diff b/testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js.diff
deleted file mode 100644
index 58dd8ba9fb..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nestedExcessPropertyChecking.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nestedExcessPropertyChecking.js
-+++ new.nestedExcessPropertyChecking.js
-@@= skipped -91, +91 lines =@@
-
-
- //// [nestedExcessPropertyChecking.js]
--"use strict";
- const ab1 = {}; // Error
- const ab2 = {}; // Error
- var E;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js b/testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js
index d2ac0e4c51..7c583cfc31 100644
--- a/testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js
+++ b/testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js
@@ -8,4 +8,5 @@ const leak = call(wrap(<T>(x: T) => x), 1);
 
 
 //// [nestedGenericSpreadInference.js]
+"use strict";
 const leak = call(wrap((x) => x), 1);
diff --git a/testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js.diff b/testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js.diff
deleted file mode 100644
index 06b9f5928d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nestedGenericSpreadInference.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.nestedGenericSpreadInference.js
-+++ new.nestedGenericSpreadInference.js
-@@= skipped -7, +7 lines =@@
-
-
- //// [nestedGenericSpreadInference.js]
--"use strict";
- const leak = call(wrap((x) => x), 1);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js b/testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js
index ef673963b3..98d750a2bb 100644
--- a/testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js
+++ b/testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js
@@ -18,6 +18,7 @@ function foo<Entity>() {
 
 
 //// [noExcessiveStackDepthError.js]
+"use strict";
 // Repro from #46631
 function foo() {
     var x;
diff --git a/testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js.diff b/testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js.diff
deleted file mode 100644
index 8cf54fc688..0000000000
--- a/testdata/baselines/reference/submodule/compiler/noExcessiveStackDepthError.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.noExcessiveStackDepthError.js
-+++ new.noExcessiveStackDepthError.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [noExcessiveStackDepthError.js]
--"use strict";
- // Repro from #46631
- function foo() {
-     var x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js b/testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js
index 67c2935404..7e2bf8723e 100644
--- a/testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js
+++ b/testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js
@@ -23,6 +23,7 @@ declare const n: number;
 
 
 //// [noUncheckedIndexedAccessCompoundAssignments.js]
+"use strict";
 // Each line should have one error
 // for a total of 12 errors
 stringMap.foo++;
diff --git a/testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js.diff b/testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js.diff
deleted file mode 100644
index 4790a7b094..0000000000
--- a/testdata/baselines/reference/submodule/compiler/noUncheckedIndexedAccessCompoundAssignments.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.noUncheckedIndexedAccessCompoundAssignments.js
-+++ new.noUncheckedIndexedAccessCompoundAssignments.js
-@@= skipped -22, +22 lines =@@
-
-
- //// [noUncheckedIndexedAccessCompoundAssignments.js]
--"use strict";
- // Each line should have one error
- // for a total of 12 errors
- stringMap.foo++;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js b/testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js
index df2f35e4aa..f1f1f0b84e 100644
--- a/testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js
+++ b/testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js
@@ -23,6 +23,7 @@ function f2(_: ReadonlyArray<number>): void {}
 
 
 //// [noUnusedLocals_writeOnly.js]
+"use strict";
 function f(x = 0, b = false) {
     // None of these statements read from 'x', so it will be marked unused.
     x = 1;
diff --git a/testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js.diff b/testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js.diff
deleted file mode 100644
index e4edd5baf6..0000000000
--- a/testdata/baselines/reference/submodule/compiler/noUnusedLocals_writeOnly.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.noUnusedLocals_writeOnly.js
-+++ new.noUnusedLocals_writeOnly.js
-@@= skipped -22, +22 lines =@@
-
-
- //// [noUnusedLocals_writeOnly.js]
--"use strict";
- function f(x = 0, b = false) {
-     // None of these statements read from 'x', so it will be marked unused.
-     x = 1;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js b/testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js
index 9800bfe268..4c6fe10907 100644
--- a/testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js
+++ b/testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js
@@ -31,5 +31,6 @@ const result2 = createAndUnbox(() => thing.pipe(
 
 
 //// [nonInferrableTypePropagation1.js]
+"use strict";
 const result1 = createAndUnbox(() => thing.pipe(map((data) => box(data)), tap((v) => log(v))));
 const result2 = createAndUnbox(() => thing.pipe(tap((v) => log(v)), map((data) => box(data))));
diff --git a/testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js.diff b/testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js.diff
deleted file mode 100644
index 0db370dfe4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nonInferrableTypePropagation1.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.nonInferrableTypePropagation1.js
-+++ new.nonInferrableTypePropagation1.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [nonInferrableTypePropagation1.js]
--"use strict";
- const result1 = createAndUnbox(() => thing.pipe(map((data) => box(data)), tap((v) => log(v))));
- const result2 = createAndUnbox(() => thing.pipe(tap((v) => log(v)), map((data) => box(data))));
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullMappedType.js b/testdata/baselines/reference/submodule/compiler/nonNullMappedType.js
index 2dc7b46918..dea5e39a39 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullMappedType.js
+++ b/testdata/baselines/reference/submodule/compiler/nonNullMappedType.js
@@ -6,6 +6,7 @@ function f<A extends string>(p0: { [key in A]: {} | undefined }, p1: A) {
 }
 
 //// [nonNullMappedType.js]
+"use strict";
 function f(p0, p1) {
     const v = p0[p1];
 }
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullMappedType.js.diff b/testdata/baselines/reference/submodule/compiler/nonNullMappedType.js.diff
deleted file mode 100644
index 0330be472b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nonNullMappedType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nonNullMappedType.js
-+++ new.nonNullMappedType.js
-@@= skipped -5, +5 lines =@@
- }
-
- //// [nonNullMappedType.js]
--"use strict";
- function f(p0, p1) {
-     const v = p0[p1];
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js b/testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js
index b76500944d..c58fc84af6 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js
+++ b/testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js
@@ -11,6 +11,7 @@ function fn<T extends string | undefined, U extends string>(one: T, two: U) {
 }
 
 //// [nonNullParameterExtendingStringAssignableToString.js]
+"use strict";
 function fn(one, two) {
     let three = Boolean() ? one : two;
     foo(one);
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js.diff b/testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js.diff
deleted file mode 100644
index 3e4a27e1f7..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nonNullParameterExtendingStringAssignableToString.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nonNullParameterExtendingStringAssignableToString.js
-+++ new.nonNullParameterExtendingStringAssignableToString.js
-@@= skipped -10, +10 lines =@@
- }
-
- //// [nonNullParameterExtendingStringAssignableToString.js]
--"use strict";
- function fn(one, two) {
-     let three = Boolean() ? one : two;
-     foo(one);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js b/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js
index 37bd845f49..666b6b8d78 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js
+++ b/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js
@@ -36,6 +36,7 @@ class Component {
 }
 
 //// [nonNullReferenceMatching.js]
+"use strict";
 class Component {
     props;
     thumbYElementRef = (ref) => {
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js.diff b/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js.diff
index 4c8cc04196..d0f19eea37 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/nonNullReferenceMatching.js.diff
@@ -1,10 +1,8 @@
 --- old.nonNullReferenceMatching.js
 +++ new.nonNullReferenceMatching.js
-@@= skipped -35, +35 lines =@@
- }
-
+@@= skipped -37, +37 lines =@@
  //// [nonNullReferenceMatching.js]
--"use strict";
+ "use strict";
  class Component {
 -    constructor() {
 -        this.thumbYElementRef = (ref) => {
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js b/testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js
index cc81c52b2d..2b8edfc4bf 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js
+++ b/testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js
@@ -20,4 +20,5 @@ type TestOld = NonNullableOld<null>;
 
 
 //// [nonNullableAndObjectIntersections.js]
+"use strict";
 // These should all resolve to never
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js.diff b/testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js.diff
deleted file mode 100644
index 900254fa63..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nonNullableAndObjectIntersections(strict=true).js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.nonNullableAndObjectIntersections(strict=true).js
-+++ new.nonNullableAndObjectIntersections(strict=true).js
-@@= skipped -19, +19 lines =@@
-
-
- //// [nonNullableAndObjectIntersections.js]
--"use strict";
- // These should all resolve to never
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullableReduction.js b/testdata/baselines/reference/submodule/compiler/nonNullableReduction.js
index f86e844830..ef2dedf05b 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullableReduction.js
+++ b/testdata/baselines/reference/submodule/compiler/nonNullableReduction.js
@@ -21,6 +21,7 @@ function f2<T, U extends null | undefined>(x: T | U) {
 
 
 //// [nonNullableReduction.js]
+"use strict";
 // Repros from #43425
 function test(f1, f2) {
     f1 === null || f1 === void 0 ? void 0 : f1("hello");
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullableReduction.js.diff b/testdata/baselines/reference/submodule/compiler/nonNullableReduction.js.diff
deleted file mode 100644
index 3e74c451a1..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nonNullableReduction.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nonNullableReduction.js
-+++ new.nonNullableReduction.js
-@@= skipped -20, +20 lines =@@
-
-
- //// [nonNullableReduction.js]
--"use strict";
- // Repros from #43425
- function test(f1, f2) {
-     f1 === null || f1 === void 0 ? void 0 : f1("hello");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js b/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js
index 4a03e50c5e..8040fa2a5e 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js
+++ b/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js
@@ -38,6 +38,7 @@ class A {
 
 
 //// [nonNullableTypes1.js]
+"use strict";
 function f1(x) {
     let y = x || "hello"; // NonNullable<T> | string
 }
diff --git a/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js.diff b/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js.diff
index 864cf279ed..1840963df1 100644
--- a/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/nonNullableTypes1.js.diff
@@ -1,14 +1,6 @@
 --- old.nonNullableTypes1.js
 +++ new.nonNullableTypes1.js
-@@= skipped -37, +37 lines =@@
-
-
- //// [nonNullableTypes1.js]
--"use strict";
- function f1(x) {
-     let y = x || "hello"; // NonNullable<T> | string
- }
-@@= skipped -25, +24 lines =@@
+@@= skipped -62, +62 lines =@@
      }
  }
  class A {
diff --git a/testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js b/testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js
index 38eb70aba2..dd5dcf3c2b 100644
--- a/testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js
+++ b/testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js
@@ -4,4 +4,5 @@
 let rect2: SVGRectElement = document.querySelector('.svg-rectangle')!; // Error: Element
 
 //// [nonnullAssertionPropegatesContextualType.js]
+"use strict";
 let rect2 = document.querySelector('.svg-rectangle'); // Error: Element
diff --git a/testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js.diff b/testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js.diff
deleted file mode 100644
index 489307535f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/nonnullAssertionPropegatesContextualType.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.nonnullAssertionPropegatesContextualType.js
-+++ new.nonnullAssertionPropegatesContextualType.js
-@@= skipped -3, +3 lines =@@
- let rect2: SVGRectElement = document.querySelector('.svg-rectangle')!; // Error: Element
-
- //// [nonnullAssertionPropegatesContextualType.js]
--"use strict";
- let rect2 = document.querySelector('.svg-rectangle'); // Error: Element
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js b/testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js
index 2311c833d4..0a2e65d185 100644
--- a/testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js
+++ b/testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js
@@ -40,6 +40,7 @@ const comp = ctor({ common: "ok", ref: x => console.log(x) });
 
 
 //// [normalizedIntersectionTooComplex.js]
+"use strict";
 // Repro from #30050
 const ctor = getCtor(all);
 const comp = ctor({ common: "ok", ref: x => console.log(x) });
diff --git a/testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js.diff b/testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js.diff
deleted file mode 100644
index 7a16b5202b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/normalizedIntersectionTooComplex.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.normalizedIntersectionTooComplex.js
-+++ new.normalizedIntersectionTooComplex.js
-@@= skipped -39, +39 lines =@@
-
-
- //// [normalizedIntersectionTooComplex.js]
--"use strict";
- // Repro from #30050
- const ctor = getCtor(all);
- const comp = ctor({ common: "ok", ref: x => console.log(x) });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js b/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js
index c0c2561c97..e5aaf976c2 100644
--- a/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js
+++ b/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js
@@ -40,6 +40,7 @@ const x: E.ONE = e;
 
 
 //// [numericEnumMappedType.js]
+"use strict";
 // Repro from #31771
 var E1;
 (function (E1) {
diff --git a/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js.diff b/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js.diff
index 1adfa55850..c1b501329b 100644
--- a/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/numericEnumMappedType.js.diff
@@ -1,14 +1,6 @@
 --- old.numericEnumMappedType.js
 +++ new.numericEnumMappedType.js
-@@= skipped -39, +39 lines =@@
-
-
- //// [numericEnumMappedType.js]
--"use strict";
- // Repro from #31771
- var E1;
- (function (E1) {
-@@= skipped -18, +17 lines =@@
+@@= skipped -57, +57 lines =@@
  b2[e2] = "b";
  var N1;
  (function (N1) {
diff --git a/testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js b/testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js
index 164218ef75..9dd6945af7 100644
--- a/testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js
+++ b/testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js
@@ -24,6 +24,7 @@ function asObservable(input: string | ObservableInput<string>): Observable<strin
 
 
 //// [observableInferenceCanBeMade.js]
+"use strict";
 // Repro from #33131
 function asObservable(input) {
     return typeof input === 'string' ? of(input) : from(input);
diff --git a/testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js.diff b/testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js.diff
deleted file mode 100644
index cef6623063..0000000000
--- a/testdata/baselines/reference/submodule/compiler/observableInferenceCanBeMade.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.observableInferenceCanBeMade.js
-+++ new.observableInferenceCanBeMade.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [observableInferenceCanBeMade.js]
--"use strict";
- // Repro from #33131
- function asObservable(input) {
-     return typeof input === 'string' ? of(input) : from(input);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js b/testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js
index 7f8886dd13..61dd7f4f68 100644
--- a/testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js
+++ b/testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js
@@ -24,6 +24,7 @@ function f(x: B) {
 
 
 //// [omitTypeHelperModifiers01.js]
+"use strict";
 function f(x) {
     const b = x.b;
     x.b = "hello";
diff --git a/testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js.diff b/testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js.diff
deleted file mode 100644
index ec1f958f60..0000000000
--- a/testdata/baselines/reference/submodule/compiler/omitTypeHelperModifiers01.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.omitTypeHelperModifiers01.js
-+++ new.omitTypeHelperModifiers01.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [omitTypeHelperModifiers01.js]
--"use strict";
- function f(x) {
-     const b = x.b;
-     x.b = "hello";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js b/testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js
index 6250415c4b..44fa43c78e 100644
--- a/testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js
+++ b/testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js
@@ -14,6 +14,7 @@ for (const [] of []) {
 }
 
 //// [omittedExpressionForOfLoop.js]
+"use strict";
 for (const [,] of doesNotExist) {
 }
 for (const [,] of undefined) {
diff --git a/testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js.diff b/testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js.diff
deleted file mode 100644
index 6ae7a2014b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/omittedExpressionForOfLoop.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.omittedExpressionForOfLoop.js
-+++ new.omittedExpressionForOfLoop.js
-@@= skipped -13, +13 lines =@@
- }
-
- //// [omittedExpressionForOfLoop.js]
--"use strict";
- for (const [,] of doesNotExist) {
- }
- for (const [,] of undefined) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js b/testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js
index ead2ac4afa..4bc3b9a6ff 100644
--- a/testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js
+++ b/testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js
@@ -22,6 +22,7 @@ var v: UnNullify<[a: 1, b?: 2 | undefined]>;
 
 
 //// [optionalTupleElementsAndUndefined.js]
+"use strict";
 // Repro from #50753
 // Types in the following declarations should be identical
 var v;
diff --git a/testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js.diff b/testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js.diff
deleted file mode 100644
index 4f6d46b1af..0000000000
--- a/testdata/baselines/reference/submodule/compiler/optionalTupleElementsAndUndefined.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.optionalTupleElementsAndUndefined.js
-+++ new.optionalTupleElementsAndUndefined.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [optionalTupleElementsAndUndefined.js]
--"use strict";
- // Repro from #50753
- // Types in the following declarations should be identical
- var v;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js b/testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js
index 0e51491da2..5d6828412d 100644
--- a/testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js
+++ b/testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js
@@ -5,4 +5,5 @@ var x;
 
 
 //// [optionsStrictPropertyInitializationStrict.js]
+"use strict";
 var x;
diff --git a/testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js.diff b/testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js.diff
deleted file mode 100644
index d126046c65..0000000000
--- a/testdata/baselines/reference/submodule/compiler/optionsStrictPropertyInitializationStrict.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.optionsStrictPropertyInitializationStrict.js
-+++ new.optionsStrictPropertyInitializationStrict.js
-@@= skipped -4, +4 lines =@@
-
-
- //// [optionsStrictPropertyInitializationStrict.js]
--"use strict";
- var x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js b/testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js
index 253b865b44..b7422166c8 100644
--- a/testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js
+++ b/testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js
@@ -31,6 +31,7 @@ new AsyncLoader({
 
 
 //// [overloadedConstructorFixesInferencesAppropriately.js]
+"use strict";
 class AsyncLoader {
     constructor(...args) { }
 }
diff --git a/testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js.diff b/testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js.diff
deleted file mode 100644
index 806c8ef333..0000000000
--- a/testdata/baselines/reference/submodule/compiler/overloadedConstructorFixesInferencesAppropriately.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.overloadedConstructorFixesInferencesAppropriately.js
-+++ new.overloadedConstructorFixesInferencesAppropriately.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [overloadedConstructorFixesInferencesAppropriately.js]
--"use strict";
- class AsyncLoader {
-     constructor(...args) { }
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js b/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js
index e489e06f7e..d159f90c3c 100644
--- a/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js
+++ b/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js
@@ -33,6 +33,7 @@ class Foo extends WithLocation(Point) {
 
 
 //// [overrideBaseIntersectionMethod.js]
+"use strict";
 // Repro from #14615
 const WithLocation = (Base) => class extends Base {
     getLocation() {
diff --git a/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js.diff b/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js.diff
index a0f6970bcd..c5dce6e365 100644
--- a/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/overrideBaseIntersectionMethod.js.diff
@@ -1,14 +1,6 @@
 --- old.overrideBaseIntersectionMethod.js
 +++ new.overrideBaseIntersectionMethod.js
-@@= skipped -32, +32 lines =@@
-
-
- //// [overrideBaseIntersectionMethod.js]
--"use strict";
- // Repro from #14615
- const WithLocation = (Base) => class extends Base {
-     getLocation() {
-@@= skipped -9, +8 lines =@@
+@@= skipped -41, +41 lines =@@
      }
  };
  class Point {
diff --git a/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js b/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js
index 630d51d13a..fb6c12d038 100644
--- a/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js
+++ b/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js
@@ -91,18 +91,18 @@ class C {
 class Foo1 {
     A;
     constructor(A) {
-        this.A = A;
         "ngInject1";
+        this.A = A;
     }
 }
 class Foo2 {
     A;
     B;
     constructor(A, B) {
-        this.A = A;
-        this.B = B;
         "ngInject1";
         "ngInject2";
+        this.A = A;
+        this.B = B;
     }
 }
 class Foo3 {
@@ -110,17 +110,16 @@ class Foo3 {
     B;
     C;
     constructor(A, B, C) {
+        "ngInject1";
+        "ngInject2";
         this.A = A;
         this.B = B;
         this.C = C;
-        "ngInject1";
-        "ngInject2";
     }
 }
 class Foo4 {
     A;
     constructor(A) {
-        "ngInject1";
         "ngInject1";
         this.A = A;
         console.log("hi");
@@ -130,8 +129,6 @@ class Foo5 {
     A;
     B;
     constructor(A, B) {
-        "ngInject1";
-        "ngInject2";
         "ngInject1";
         "ngInject2";
         this.A = A;
@@ -144,8 +141,6 @@ class Foo6 {
     B;
     C;
     constructor(A, B, C) {
-        "ngInject1";
-        "ngInject2";
         "ngInject1";
         "ngInject2";
         this.A = A;
@@ -157,7 +152,6 @@ class Foo6 {
 class Foo7 extends C {
     member;
     constructor(member) {
-        "ngInject1";
         "ngInject1";
         super();
         this.member = member;
@@ -167,7 +161,6 @@ class Foo7 extends C {
 class Foo8 extends C {
     member;
     constructor(member) {
-        "ngInject1";
         "ngInject1";
         super();
         this.member = member;
@@ -178,8 +171,6 @@ class Foo8 extends C {
 }
 class Foo9 extends C {
     constructor() {
-        "ngInject1";
-        "ngInject2";
         "ngInject1";
         "ngInject2";
         super();
diff --git a/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js.diff b/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js.diff
index b774fe09c6..6a8d95446b 100644
--- a/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/parameterPropertyInConstructorWithPrologues.js.diff
@@ -6,21 +6,17 @@
  class Foo1 {
 +    A;
      constructor(A) {
--        "ngInject1";
+         "ngInject1";
          this.A = A;
-+        "ngInject1";
      }
  }
  class Foo2 {
 +    A;
 +    B;
      constructor(A, B) {
--        "ngInject1";
--        "ngInject2";
-         this.A = A;
-         this.B = B;
-+        "ngInject1";
-+        "ngInject2";
+         "ngInject1";
+         "ngInject2";
+@@= skipped -14, +17 lines =@@
      }
  }
  class Foo3 {
@@ -28,34 +24,26 @@
 +    B;
 +    C;
      constructor(A, B, C) {
--        "ngInject1";
--        "ngInject2";
-         this.A = A;
-         this.B = B;
-         this.C = C;
-+        "ngInject1";
-+        "ngInject2";
+         "ngInject1";
+         "ngInject2";
+@@= skipped -9, +12 lines =@@
      }
  }
  class Foo4 {
 +    A;
      constructor(A) {
-+        "ngInject1";
          "ngInject1";
          this.A = A;
-         console.log("hi");
+@@= skipped -7, +8 lines =@@
      }
  }
  class Foo5 {
 +    A;
 +    B;
      constructor(A, B) {
-+        "ngInject1";
-+        "ngInject2";
          "ngInject1";
          "ngInject2";
-         this.A = A;
-@@= skipped -39, +51 lines =@@
+@@= skipped -9, +11 lines =@@
      }
  }
  class Foo6 {
@@ -63,37 +51,21 @@
 +    B;
 +    C;
      constructor(A, B, C) {
-+        "ngInject1";
-+        "ngInject2";
          "ngInject1";
          "ngInject2";
-         this.A = A;
-@@= skipped -10, +15 lines =@@
+@@= skipped -10, +13 lines =@@
      }
  }
  class Foo7 extends C {
 +    member;
      constructor(member) {
-+        "ngInject1";
          "ngInject1";
          super();
-         this.member = member;
-@@= skipped -8, +10 lines =@@
+@@= skipped -8, +9 lines =@@
      }
  }
  class Foo8 extends C {
 +    member;
      constructor(member) {
-+        "ngInject1";
-         "ngInject1";
-         super();
-         this.member = member;
-@@= skipped -11, +13 lines =@@
- }
- class Foo9 extends C {
-     constructor() {
-+        "ngInject1";
-+        "ngInject2";
          "ngInject1";
-         "ngInject2";
          super();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js b/testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js
index ac76dcbf95..eb82a5d882 100644
--- a/testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js
@@ -26,6 +26,7 @@ const d: !number = 1;
 
 
 //// [parseInvalidNonNullableTypes.js]
+"use strict";
 function f1(a) {
     return true;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js.diff b/testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js.diff
deleted file mode 100644
index 201a24e30e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/parseInvalidNonNullableTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.parseInvalidNonNullableTypes.js
-+++ new.parseInvalidNonNullableTypes.js
-@@= skipped -25, +25 lines =@@
-
-
- //// [parseInvalidNonNullableTypes.js]
--"use strict";
- function f1(a) {
-     return true;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js b/testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js
index 88f5b2be23..9fa67aa1f0 100644
--- a/testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js
@@ -28,6 +28,7 @@ let h: undefined?;
 
 
 //// [parseInvalidNullableTypes.js]
+"use strict";
 function f1(a) {
     return true;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js.diff b/testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js.diff
deleted file mode 100644
index a04f4a4911..0000000000
--- a/testdata/baselines/reference/submodule/compiler/parseInvalidNullableTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.parseInvalidNullableTypes.js
-+++ new.parseInvalidNullableTypes.js
-@@= skipped -27, +27 lines =@@
-
-
- //// [parseInvalidNullableTypes.js]
--"use strict";
- function f1(a) {
-     return true;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js b/testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js
index df4dfdb498..9d3423138e 100644
--- a/testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js
+++ b/testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js
@@ -74,6 +74,7 @@ for (const k of keys) {
 
 
 //// [partialOfLargeAPIIsAbleToBeWorkedWith.js]
+"use strict";
 const obj = {};
 for (const k of keys) {
     obj[k] = () => "12"; // shouldn't cause a complexity error
diff --git a/testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js.diff b/testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js.diff
deleted file mode 100644
index fa3747b68e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/partialOfLargeAPIIsAbleToBeWorkedWith.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.partialOfLargeAPIIsAbleToBeWorkedWith.js
-+++ new.partialOfLargeAPIIsAbleToBeWorkedWith.js
-@@= skipped -73, +73 lines =@@
-
-
- //// [partialOfLargeAPIIsAbleToBeWorkedWith.js]
--"use strict";
- const obj = {};
- for (const k of keys) {
-     obj[k] = () => "12"; // shouldn't cause a complexity error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js b/testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js
index 0443575e15..1c9328bf64 100644
--- a/testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js
+++ b/testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js
@@ -28,6 +28,7 @@ function getUserName(obj: Obj) {
 }
 
 //// [partialTypeNarrowedToByTypeGuard.js]
+"use strict";
 // type PartialUser = {
 //   email?: string;
 //   name?: string;
diff --git a/testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js.diff b/testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js.diff
deleted file mode 100644
index b9bb7c3581..0000000000
--- a/testdata/baselines/reference/submodule/compiler/partialTypeNarrowedToByTypeGuard.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.partialTypeNarrowedToByTypeGuard.js
-+++ new.partialTypeNarrowedToByTypeGuard.js
-@@= skipped -27, +27 lines =@@
- }
-
- //// [partialTypeNarrowedToByTypeGuard.js]
--"use strict";
- // type PartialUser = {
- //   email?: string;
- //   name?: string;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js b/testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js
index 080c0b8c91..b743fca4ee 100644
--- a/testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js
+++ b/testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js
@@ -12,6 +12,7 @@ try {
 
 
 //// [potentiallyUnassignedVariableInCatch.js]
+"use strict";
 let foo;
 try {
     if (Math.random() > 0.5) {
diff --git a/testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js.diff b/testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js.diff
deleted file mode 100644
index 81ffab8fe6..0000000000
--- a/testdata/baselines/reference/submodule/compiler/potentiallyUnassignedVariableInCatch.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.potentiallyUnassignedVariableInCatch.js
-+++ new.potentiallyUnassignedVariableInCatch.js
-@@= skipped -11, +11 lines =@@
-
-
- //// [potentiallyUnassignedVariableInCatch.js]
--"use strict";
- let foo;
- try {
-     if (Math.random() > 0.5) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js b/testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js
index 427974daad..a6e8a5ffdd 100644
--- a/testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js
+++ b/testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js
@@ -11,6 +11,7 @@ const result = getInterfaceFromString({ type: 'two' });
 
 
 //// [primitiveUnionDetection.js]
+"use strict";
 // Repro from #46624
 const result = getInterfaceFromString({ type: 'two' });
 
diff --git a/testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js.diff b/testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js.diff
deleted file mode 100644
index 7beb348355..0000000000
--- a/testdata/baselines/reference/submodule/compiler/primitiveUnionDetection.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.primitiveUnionDetection.js
-+++ new.primitiveUnionDetection.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [primitiveUnionDetection.js]
--"use strict";
- // Repro from #46624
- const result = getInterfaceFromString({ type: 'two' });
diff --git a/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js b/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js
index 349c9d265f..355948b1b0 100644
--- a/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js
+++ b/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js
@@ -17,6 +17,7 @@ type __ValueDescriptorType<T extends string | object> = T extends ISyncableObjec
 
 
 //// [privatePropertyInUnion.js]
+"use strict";
 // Repro from #38236
 class SyncableObject {
     foo;
diff --git a/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js.diff b/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js.diff
index 72a48f34b7..4e216a041e 100644
--- a/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/privatePropertyInUnion.js.diff
@@ -1,10 +1,7 @@
 --- old.privatePropertyInUnion.js
 +++ new.privatePropertyInUnion.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [privatePropertyInUnion.js]
--"use strict";
+@@= skipped -19, +19 lines =@@
+ "use strict";
  // Repro from #38236
  class SyncableObject {
 +    foo;
diff --git a/testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js b/testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js
index ce777991a3..956eb35d2b 100644
--- a/testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js
+++ b/testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js
@@ -8,4 +8,5 @@ wrapResolver(resolver() || []);
 
 
 //// [propagateNonInferrableType.js]
+"use strict";
 wrapResolver(resolver() || []);
diff --git a/testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js.diff b/testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js.diff
deleted file mode 100644
index 54fe9a59bd..0000000000
--- a/testdata/baselines/reference/submodule/compiler/propagateNonInferrableType.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.propagateNonInferrableType.js
-+++ new.propagateNonInferrableType.js
-@@= skipped -7, +7 lines =@@
-
-
- //// [propagateNonInferrableType.js]
--"use strict";
- wrapResolver(resolver() || []);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js b/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js
index e9ca9853df..16a5093407 100644
--- a/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js
+++ b/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js
@@ -24,6 +24,7 @@ const bindCopy2: BindingFunction = function () {
 }
 
 //// [protectedAccessThroughContextualThis.js]
+"use strict";
 class Foo {
     protec = 'bar';
     privat = '';
diff --git a/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js.diff b/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js.diff
index 8a3f9a927f..3a1be932a6 100644
--- a/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/protectedAccessThroughContextualThis.js.diff
@@ -1,10 +1,8 @@
 --- old.protectedAccessThroughContextualThis.js
 +++ new.protectedAccessThroughContextualThis.js
-@@= skipped -23, +23 lines =@@
- }
-
+@@= skipped -25, +25 lines =@@
  //// [protectedAccessThroughContextualThis.js]
--"use strict";
+ "use strict";
  class Foo {
 +    protec = 'bar';
 +    privat = '';
diff --git a/testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js b/testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js
index 0163cf6934..c7e8f30d94 100644
--- a/testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js
+++ b/testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js
@@ -571,3 +571,4 @@ declare module "Function/Curry" {
 
 
 //// [ramdaToolsNoInfinite2.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js.diff b/testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js.diff
deleted file mode 100644
index 0f714ad588..0000000000
--- a/testdata/baselines/reference/submodule/compiler/ramdaToolsNoInfinite2.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.ramdaToolsNoInfinite2.js
-+++ new.ramdaToolsNoInfinite2.js
-@@= skipped -570, +570 lines =@@
-
-
- //// [ramdaToolsNoInfinite2.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js b/testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js
index 3a0ba94913..04232fbc79 100644
--- a/testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js
+++ b/testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js
@@ -15,6 +15,7 @@ function copy(a: Float32Array) {
 }
 
 //// [readonlyFloat32ArrayAssignableWithFloat32Array.js]
+"use strict";
 function update(b) {
     const c = copy(b);
     add(c, c);
diff --git a/testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js.diff b/testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js.diff
deleted file mode 100644
index 7ab8cf04ca..0000000000
--- a/testdata/baselines/reference/submodule/compiler/readonlyFloat32ArrayAssignableWithFloat32Array.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.readonlyFloat32ArrayAssignableWithFloat32Array.js
-+++ new.readonlyFloat32ArrayAssignableWithFloat32Array.js
-@@= skipped -14, +14 lines =@@
- }
-
- //// [readonlyFloat32ArrayAssignableWithFloat32Array.js]
--"use strict";
- function update(b) {
-     const c = copy(b);
-     add(c, c);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js b/testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js
index 30721da2df..92f7837943 100644
--- a/testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js
+++ b/testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js
@@ -24,6 +24,7 @@ class Derived1 extends class extends Base1 {
 
 
 //// [recursiveClassBaseType.js]
+"use strict";
 // Repro from #44281
 class C extends Base({ x: p(() => []) }) {
 }
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js.diff b/testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js.diff
deleted file mode 100644
index 4dd8f82a35..0000000000
--- a/testdata/baselines/reference/submodule/compiler/recursiveClassBaseType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.recursiveClassBaseType.js
-+++ new.recursiveClassBaseType.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [recursiveClassBaseType.js]
--"use strict";
- // Repro from #44281
- class C extends Base({ x: p(() => []) }) {
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js b/testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js
index 2365d463b0..b99ddac1ee 100644
--- a/testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js
@@ -174,6 +174,7 @@ function foo2<T extends unknown[]>(value: T): Enumerate<T['length']> {
 
 
 //// [recursiveConditionalTypes.js]
+"use strict";
 // Awaiting promises
 function f11(tx, ta, ux, ua) {
     ta = ua;
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js.diff b/testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js.diff
deleted file mode 100644
index 749885f54a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/recursiveConditionalTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.recursiveConditionalTypes.js
-+++ new.recursiveConditionalTypes.js
-@@= skipped -173, +173 lines =@@
-
-
- //// [recursiveConditionalTypes.js]
--"use strict";
- // Awaiting promises
- function f11(tx, ta, ux, ua) {
-     ta = ua;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js b/testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js
index c3657e0cc5..6ebc5e87b2 100644
--- a/testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js
+++ b/testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js
@@ -17,6 +17,7 @@ getMaxId(nodes);
 
 
 //// [recursiveExcessPropertyChecks.js]
+"use strict";
 // Repro from #35804
 function getMaxId(items) {
 }
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js.diff b/testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js.diff
deleted file mode 100644
index 01001ef3eb..0000000000
--- a/testdata/baselines/reference/submodule/compiler/recursiveExcessPropertyChecks.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.recursiveExcessPropertyChecks.js
-+++ new.recursiveExcessPropertyChecks.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [recursiveExcessPropertyChecks.js]
--"use strict";
- // Repro from #35804
- function getMaxId(items) {
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js b/testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js
index 287d40a1f9..dc705b0734 100644
--- a/testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js
+++ b/testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js
@@ -17,6 +17,7 @@ function a<T>(l: Recur<T>[]): void {
 
 
 //// [recursiveReverseMappedType.js]
+"use strict";
 // Repro from #38198
 function join(l) {
     return ['marker', ...l];
diff --git a/testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js.diff b/testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js.diff
deleted file mode 100644
index 3488dfc69a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/recursiveReverseMappedType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.recursiveReverseMappedType.js
-+++ new.recursiveReverseMappedType.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [recursiveReverseMappedType.js]
--"use strict";
- // Repro from #38198
- function join(l) {
-     return ['marker', ...l];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js b/testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js
index 531cec98d3..5ad80dbe8c 100644
--- a/testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js
+++ b/testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js
@@ -14,5 +14,6 @@ y = x;
 
 
 //// [relatedViaDiscriminatedTypeNoError2.js]
+"use strict";
 x = y;
 y = x;
diff --git a/testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js.diff b/testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js.diff
deleted file mode 100644
index bd9e8dbb60..0000000000
--- a/testdata/baselines/reference/submodule/compiler/relatedViaDiscriminatedTypeNoError2.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.relatedViaDiscriminatedTypeNoError2.js
-+++ new.relatedViaDiscriminatedTypeNoError2.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [relatedViaDiscriminatedTypeNoError2.js]
--"use strict";
- x = y;
- y = x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/restElementAssignable.js b/testdata/baselines/reference/submodule/compiler/restElementAssignable.js
index 4f8eab6bb4..e11da306a1 100644
--- a/testdata/baselines/reference/submodule/compiler/restElementAssignable.js
+++ b/testdata/baselines/reference/submodule/compiler/restElementAssignable.js
@@ -19,6 +19,7 @@
 
 
 //// [restElementAssignable.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/compiler/restElementAssignable.js.diff b/testdata/baselines/reference/submodule/compiler/restElementAssignable.js.diff
deleted file mode 100644
index 89ae16791e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/restElementAssignable.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.restElementAssignable.js
-+++ new.restElementAssignable.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [restElementAssignable.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js b/testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js
index a9c85a1024..2695b3d9c9 100644
--- a/testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js
+++ b/testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js
@@ -16,6 +16,7 @@ const result: number = removeF<number>({ f: '', g: 3 }).g
 
 
 //// [restParameterTypeInstantiation.js]
+"use strict";
 // Repro from #33823
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
diff --git a/testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js.diff b/testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js.diff
deleted file mode 100644
index 41c49e47b0..0000000000
--- a/testdata/baselines/reference/submodule/compiler/restParameterTypeInstantiation.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.restParameterTypeInstantiation.js
-+++ new.restParameterTypeInstantiation.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [restParameterTypeInstantiation.js]
--"use strict";
- // Repro from #33823
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/restUnion3.js b/testdata/baselines/reference/submodule/compiler/restUnion3.js
index fe689c9f37..59ab60b7d0 100644
--- a/testdata/baselines/reference/submodule/compiler/restUnion3.js
+++ b/testdata/baselines/reference/submodule/compiler/restUnion3.js
@@ -11,6 +11,7 @@ var {...rest5 } = unionWithIntersection;
 
 
 //// [restUnion3.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/compiler/restUnion3.js.diff b/testdata/baselines/reference/submodule/compiler/restUnion3.js.diff
deleted file mode 100644
index 6492ea2183..0000000000
--- a/testdata/baselines/reference/submodule/compiler/restUnion3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.restUnion3.js
-+++ new.restUnion3.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [restUnion3.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js b/testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js
index e95d8ac61b..c74856859a 100644
--- a/testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js
+++ b/testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js
@@ -8,5 +8,6 @@ conforms({ foo: (v: string) => false })({ foo: "hello" });
 
 
 //// [reverseMappedContravariantInference.js]
+"use strict";
 // Repro from #21273
 conforms({ foo: (v) => false })({ foo: "hello" });
diff --git a/testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js.diff b/testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js.diff
deleted file mode 100644
index 058bb5bd55..0000000000
--- a/testdata/baselines/reference/submodule/compiler/reverseMappedContravariantInference.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.reverseMappedContravariantInference.js
-+++ new.reverseMappedContravariantInference.js
-@@= skipped -7, +7 lines =@@
-
-
- //// [reverseMappedContravariantInference.js]
--"use strict";
- // Repro from #21273
- conforms({ foo: (v) => false })({ foo: "hello" });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js b/testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js
index e2a83d3438..e2749d9ea4 100644
--- a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js
+++ b/testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js
@@ -176,6 +176,7 @@ const config2 = createXMachine({
 
 
 //// [reverseMappedTypeIntersectionConstraint.js]
+"use strict";
 const inferredParams1 = createMachine({
     entry: "foo",
     states: {
diff --git a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js.diff b/testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js.diff
deleted file mode 100644
index 55b6641f6a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeIntersectionConstraint.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.reverseMappedTypeIntersectionConstraint.js
-+++ new.reverseMappedTypeIntersectionConstraint.js
-@@= skipped -175, +175 lines =@@
-
-
- //// [reverseMappedTypeIntersectionConstraint.js]
--"use strict";
- const inferredParams1 = createMachine({
-     entry: "foo",
-     states: {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js b/testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js
index f600b29bd7..05f590d554 100644
--- a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js
+++ b/testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js
@@ -19,6 +19,7 @@ const bar: Bar<any> = {};
 test(bar);
 
 //// [reverseMappedTypeRecursiveInference.js]
+"use strict";
 function test(value) {
     console.log(value);
     return undefined;
diff --git a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js.diff b/testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js.diff
deleted file mode 100644
index d207f1caf4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/reverseMappedTypeRecursiveInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.reverseMappedTypeRecursiveInference.js
-+++ new.reverseMappedTypeRecursiveInference.js
-@@= skipped -18, +18 lines =@@
- test(bar);
-
- //// [reverseMappedTypeRecursiveInference.js]
--"use strict";
- function test(value) {
-     console.log(value);
-     return undefined;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js b/testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js
index 82191766e6..7ef9c76d67 100644
--- a/testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js
+++ b/testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js
@@ -7,6 +7,7 @@ declare function h<T>(): typeof h<T>;
 
 
 //// [selfReferentialFunctionType.js]
+"use strict";
 
 
 //// [selfReferentialFunctionType.d.ts]
diff --git a/testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js.diff b/testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js.diff
deleted file mode 100644
index 734fee7c4b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/selfReferentialFunctionType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.selfReferentialFunctionType.js
-+++ new.selfReferentialFunctionType.js
-@@= skipped -6, +6 lines =@@
-
-
- //// [selfReferentialFunctionType.js]
--"use strict";
-
-
- //// [selfReferentialFunctionType.d.ts]
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js b/testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js
index 5b81107a80..fa95a1711c 100644
--- a/testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js
+++ b/testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js
@@ -15,6 +15,7 @@ const myVar: Foo = new Bar();
 
 
 //// [signatureInstantiationWithRecursiveConstraints.js]
+"use strict";
 // Repro from #17148
 class Foo {
     myFunc(arg) { }
diff --git a/testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js.diff b/testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js.diff
deleted file mode 100644
index c82bfc1b4a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/signatureInstantiationWithRecursiveConstraints.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.signatureInstantiationWithRecursiveConstraints.js
-+++ new.signatureInstantiationWithRecursiveConstraints.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [signatureInstantiationWithRecursiveConstraints.js]
--"use strict";
- // Repro from #17148
- class Foo {
-     myFunc(arg) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js b/testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js
index eaeee061fc..56ec9447fd 100644
--- a/testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js
+++ b/testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js
@@ -29,6 +29,7 @@ breaks.foo()
 
 
 //// [silentNeverPropagation.js]
+"use strict";
 // Repro from #45041
 const breaks = convert(createModule({ a: 12 }, { foo() { return true; } }));
 breaks.state.a;
diff --git a/testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js.diff b/testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js.diff
deleted file mode 100644
index b208c9fe5a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/silentNeverPropagation.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.silentNeverPropagation.js
-+++ new.silentNeverPropagation.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [silentNeverPropagation.js]
--"use strict";
- // Repro from #45041
- const breaks = convert(createModule({ a: 12 }, { foo() { return true; } }));
- breaks.state.a;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js b/testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js
index fc1b6c6053..46f03b8c65 100644
--- a/testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js
+++ b/testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js
@@ -37,6 +37,7 @@ function fn5() {
 
 
 //// [simpleRecursionWithBaseCase1.js]
+"use strict";
 function fn1(n) {
     if (n === 0) {
         return 3;
diff --git a/testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js.diff b/testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js.diff
deleted file mode 100644
index cc52ced15c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/simpleRecursionWithBaseCase1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.simpleRecursionWithBaseCase1.js
-+++ new.simpleRecursionWithBaseCase1.js
-@@= skipped -36, +36 lines =@@
-
-
- //// [simpleRecursionWithBaseCase1.js]
--"use strict";
- function fn1(n) {
-     if (n === 0) {
-         return 3;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js b/testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js
index 982b0dee12..08f745ec41 100644
--- a/testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js
+++ b/testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js
@@ -32,6 +32,7 @@ function f<T>() {
 
 
 //// [simplifyingConditionalWithInteriorConditionalIsRelated.js]
+"use strict";
 function ConditionalOrUndefined() {
     return 0;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js.diff b/testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js.diff
deleted file mode 100644
index d576f0bc8a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/simplifyingConditionalWithInteriorConditionalIsRelated.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.simplifyingConditionalWithInteriorConditionalIsRelated.js
-+++ new.simplifyingConditionalWithInteriorConditionalIsRelated.js
-@@= skipped -31, +31 lines =@@
-
-
- //// [simplifyingConditionalWithInteriorConditionalIsRelated.js]
--"use strict";
- function ConditionalOrUndefined() {
-     return 0;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js
index 08dea902a6..9ecbf3772d 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js
@@ -42,7 +42,6 @@ var Foo;
 (function (Foo) {
     let Bar;
     (function (Bar) {
-        "use strict";
         "use strict";
         class Greeter {
             greeting;
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.diff b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.diff
index 8398fddde3..02811c0bd2 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.diff
@@ -8,7 +8,6 @@
 +    let Bar;
      (function (Bar) {
          "use strict";
-+        "use strict";
          class Greeter {
 +            greeting;
              constructor(greeting) {
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map
index 9e21ddaa7a..59288be253 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map
@@ -1,3 +1,3 @@
 //// [sourceMapSample.js.map]
-{"version":3,"file":"sourceMapSample.js","sourceRoot":"","sources":["sourceMapSample.ts"],"names":[],"mappings":"AAAA,IAAO,GAkCN;AAlCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAkCV;IAlCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAAb,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAmB;YAC5C,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAuB,EAAE;YACxD,IAAI,QAAQ,GAAc,EAAE,CAAC;YAC7B,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAlCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAkCb;AADI,CACL,AAlCA,EAAO,GAAG,KAAH,GAAG,QAkCT"}
-//// https://sokra.github.io/source-map-visualization#base64,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,eyJ2ZXJzaW9uIjozLCJmaWxlIjoic291cmNlTWFwU2FtcGxlLmpzIiwic291cmNlUm9vdCI6IiIsInNvdXJjZXMiOlsic291cmNlTWFwU2FtcGxlLnRzIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiJBQUFBLElBQU8sR0FrQ047QUFsQ0QsV0FBTyxHQUFHLEVBQVY7SUFBVyxJQUFBLEdBa0NWO0lBbENVLFdBQUEsR0FBRyxFQUFDO1FBQ1gsWUFBWSxDQUFDO1FBQWIsWUFBWSxDQUFDO1FBRWIsTUFBTSxPQUFPO1lBQ1UsUUFBUTtZQUEzQixZQUFtQixRQUFnQixFQUFFO2dDQUFsQixRQUFRO1lBQVcsQ0FDckM7WUFFRCxLQUFLLEdBQUc7Z0JBQ0osT0FBTyxNQUFNLEdBQUcsSUFBSSxDQUFDLFFBQVEsR0FBRyxPQUFPLENBQUM7WUFBQSxDQUMzQztTQUNKO1FBR0QsU0FBUyxHQUFHLENBQUMsUUFBZ0IsRUFBbUI7WUFDNUMsT0FBTyxJQUFJLE9BQU8sQ0FBQyxRQUFRLENBQUMsQ0FBQztRQUFBLENBQ2hDO1FBRUQsSUFBSSxPQUFPLEdBQUcsSUFBSSxPQUFPLENBQUMsZUFBZSxDQUFDLENBQUM7UUFDM0MsSUFBSSxHQUFHLEdBQUcsT0FBTyxDQUFDLEtBQUssRUFBRSxDQUFDO1FBRTFCLFNBQVMsSUFBSSxDQUFDLFFBQWdCLEVBQUUsR0FBRyxhQUF1QixFQUFFO1lBQ3hELElBQUksUUFBUSxHQUFjLEVBQUUsQ0FBQztZQUM3QixRQUFRLENBQUMsQ0FBQyxDQUFDLEdBQUcsSUFBSSxPQUFPLENBQUMsUUFBUSxDQUFDLENBQUM7WUFDcEMsS0FBSyxJQUFJLENBQUMsR0FBRyxDQUFDLEVBQUUsQ0FBQyxHQUFHLGFBQWEsQ0FBQyxNQUFNLEVBQUUsQ0FBQyxFQUFFLEVBQUUsQ0FBQztnQkFDNUMsUUFBUSxDQUFDLElBQUksQ0FBQyxJQUFJLE9BQU8sQ0FBQyxhQUFhLENBQUMsQ0FBQyxDQUFDLENBQUMsQ0FBQyxDQUFDO1lBQ2pELENBQUM7WUFFRCxPQUFPLFFBQVEsQ0FBQztRQUFBLENBQ25CO1FBRUQsSUFBSSxDQUFDLEdBQUcsSUFBSSxDQUFDLE9BQU8sRUFBRSxPQUFPLEVBQUUsR0FBRyxDQUFDLENBQUM7UUFDcEMsS0FBSyxJQUFJLENBQUMsR0FBRyxDQUFDLEVBQUUsQ0FBQyxHQUFHLENBQUMsQ0FBQyxNQUFNLEVBQUUsQ0FBQyxFQUFFLEVBQUUsQ0FBQztZQUNoQyxDQUFDLENBQUMsQ0FBQyxDQUFDLENBQUMsS0FBSyxFQUFFLENBQUM7UUFDakIsQ0FBQztJQUFBLENBQ0osRUFsQ1UsR0FBRyxHQUFILElBQUEsR0FBRyxLQUFILElBQUEsR0FBRyxRQWtDYjtBQURJLENBQ0wsQUFsQ0EsRUFBTyxHQUFHLEtBQUgsR0FBRyxRQWtDVCJ9,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
+{"version":3,"file":"sourceMapSample.js","sourceRoot":"","sources":["sourceMapSample.ts"],"names":[],"mappings":"AAAA,IAAO,GAkCN;AAlCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAkCV;IAlCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAmB;YAC5C,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAuB,EAAE;YACxD,IAAI,QAAQ,GAAc,EAAE,CAAC;YAC7B,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAlCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAkCb;AADI,CACL,AAlCA,EAAO,GAAG,KAAH,GAAG,QAkCT"}
+//// https://sokra.github.io/source-map-visualization#base64,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,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,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
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map.diff b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map.diff
index 96b871a182..db6dd39c33 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map.diff
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapSample.js.map.diff
@@ -4,5 +4,5 @@
  //// [sourceMapSample.js.map]
 -{"version":3,"file":"sourceMapSample.js","sourceRoot":"","sources":["sourceMapSample.ts"],"names":[],"mappings":"AAAA,IAAO,GAAG,CAkCT;AAlCD,WAAO,GAAG;IAAC,IAAA,GAAG,CAkCb;IAlCU,WAAA,GAAG;QACV,YAAY,CAAC;QAEb,MAAM,OAAO;YACT,YAAmB,QAAgB;gBAAhB,aAAQ,GAAR,QAAQ,CAAQ;YACnC,CAAC;YAED,KAAK;gBACD,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAC5C,CAAC;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB;YACzB,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QACjC,CAAC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAuB;YACtD,IAAI,QAAQ,GAAc,EAAE,CAAC;YAC7B,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QACpB,CAAC;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IACL,CAAC,EAlCU,GAAG,GAAH,OAAG,KAAH,OAAG,QAkCb;AAAD,CAAC,EAlCM,GAAG,KAAH,GAAG,QAkCT"}
 -//// https://sokra.github.io/source-map-visualization#base64,dmFyIEZvbzsNCihmdW5jdGlvbiAoRm9vKSB7DQogICAgdmFyIEJhcjsNCiAgICAoZnVuY3Rpb24gKEJhcikgew0KICAgICAgICAidXNlIHN0cmljdCI7DQogICAgICAgIGNsYXNzIEdyZWV0ZXIgew0KICAgICAgICAgICAgY29uc3RydWN0b3IoZ3JlZXRpbmcpIHsNCiAgICAgICAgICAgICAgICB0aGlzLmdyZWV0aW5nID0gZ3JlZXRpbmc7DQogICAgICAgICAgICB9DQogICAgICAgICAgICBncmVldCgpIHsNCiAgICAgICAgICAgICAgICByZXR1cm4gIjxoMT4iICsgdGhpcy5ncmVldGluZyArICI8L2gxPiI7DQogICAgICAgICAgICB9DQogICAgICAgIH0NCiAgICAgICAgZnVuY3Rpb24gZm9vKGdyZWV0aW5nKSB7DQogICAgICAgICAgICByZXR1cm4gbmV3IEdyZWV0ZXIoZ3JlZXRpbmcpOw0KICAgICAgICB9DQogICAgICAgIHZhciBncmVldGVyID0gbmV3IEdyZWV0ZXIoIkhlbGxvLCB3b3JsZCEiKTsNCiAgICAgICAgdmFyIHN0ciA9IGdyZWV0ZXIuZ3JlZXQoKTsNCiAgICAgICAgZnVuY3Rpb24gZm9vMihncmVldGluZywgLi4ucmVzdEdyZWV0aW5ncykgew0KICAgICAgICAgICAgdmFyIGdyZWV0ZXJzID0gW107DQogICAgICAgICAgICBncmVldGVyc1swXSA9IG5ldyBHcmVldGVyKGdyZWV0aW5nKTsNCiAgICAgICAgICAgIGZvciAodmFyIGkgPSAwOyBpIDwgcmVzdEdyZWV0aW5ncy5sZW5ndGg7IGkrKykgew0KICAgICAgICAgICAgICAgIGdyZWV0ZXJzLnB1c2gobmV3IEdyZWV0ZXIocmVzdEdyZWV0aW5nc1tpXSkpOw0KICAgICAgICAgICAgfQ0KICAgICAgICAgICAgcmV0dXJuIGdyZWV0ZXJzOw0KICAgICAgICB9DQogICAgICAgIHZhciBiID0gZm9vMigiSGVsbG8iLCAiV29ybGQiLCAiISIpOw0KICAgICAgICBmb3IgKHZhciBqID0gMDsgaiA8IGIubGVuZ3RoOyBqKyspIHsNCiAgICAgICAgICAgIGJbal0uZ3JlZXQoKTsNCiAgICAgICAgfQ0KICAgIH0pKEJhciA9IEZvby5CYXIgfHwgKEZvby5CYXIgPSB7fSkpOw0KfSkoRm9vIHx8IChGb28gPSB7fSkpOw0KLy8jIHNvdXJjZU1hcHBpbmdVUkw9c291cmNlTWFwU2FtcGxlLmpzLm1hcA==,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,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
-+{"version":3,"file":"sourceMapSample.js","sourceRoot":"","sources":["sourceMapSample.ts"],"names":[],"mappings":"AAAA,IAAO,GAkCN;AAlCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAkCV;IAlCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAAb,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAmB;YAC5C,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAuB,EAAE;YACxD,IAAI,QAAQ,GAAc,EAAE,CAAC;YAC7B,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAlCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAkCb;AADI,CACL,AAlCA,EAAO,GAAG,KAAH,GAAG,QAkCT"}
-+//// https://sokra.github.io/source-map-visualization#base64,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,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,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
\ No newline at end of file
++{"version":3,"file":"sourceMapSample.js","sourceRoot":"","sources":["sourceMapSample.ts"],"names":[],"mappings":"AAAA,IAAO,GAkCN;AAlCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAkCV;IAlCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAmB;YAC5C,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAuB,EAAE;YACxD,IAAI,QAAQ,GAAc,EAAE,CAAC;YAC7B,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAlCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAkCb;AADI,CACL,AAlCA,EAAO,GAAG,KAAH,GAAG,QAkCT"}
++//// https://sokra.github.io/source-map-visualization#base64,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,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,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
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt b/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt
index 18da9c3ae4..e92ab45d00 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt
@@ -133,7 +133,7 @@ sourceFile:sourceMapSample.ts
 1->^^^^^^^^
 2 >        ^^^^^^^^^^^^
 3 >                    ^
-4 >                     ^->
+4 >                     ^^^->
 1->{
   >    
 2 >        "use strict"
@@ -142,18 +142,6 @@ sourceFile:sourceMapSample.ts
 2 >Emitted(5, 21) Source(2, 17) + SourceIndex(0)
 3 >Emitted(5, 22) Source(2, 18) + SourceIndex(0)
 ---
->>>        "use strict";
-1->^^^^^^^^
-2 >        ^^^^^^^^^^^^
-3 >                    ^
-4 >                     ^^^->
-1->
-2 >        "use strict"
-3 >                    ;
-1->Emitted(6, 9) Source(2, 5) + SourceIndex(0)
-2 >Emitted(6, 21) Source(2, 17) + SourceIndex(0)
-3 >Emitted(6, 22) Source(2, 18) + SourceIndex(0)
----
 >>>        class Greeter {
 1->^^^^^^^^
 2 >        ^^^^^^
@@ -164,9 +152,9 @@ sourceFile:sourceMapSample.ts
   >    
 2 >        class 
 3 >              Greeter
-1->Emitted(7, 9) Source(4, 5) + SourceIndex(0)
-2 >Emitted(7, 15) Source(4, 11) + SourceIndex(0)
-3 >Emitted(7, 22) Source(4, 18) + SourceIndex(0)
+1->Emitted(6, 9) Source(4, 5) + SourceIndex(0)
+2 >Emitted(6, 15) Source(4, 11) + SourceIndex(0)
+3 >Emitted(6, 22) Source(4, 18) + SourceIndex(0)
 ---
 >>>            greeting;
 1->^^^^^^^^^^^^
@@ -175,8 +163,8 @@ sourceFile:sourceMapSample.ts
 1-> {
   >        constructor(public 
 2 >            greeting
-1->Emitted(8, 13) Source(5, 28) + SourceIndex(0)
-2 >Emitted(8, 21) Source(5, 36) + SourceIndex(0)
+1->Emitted(7, 13) Source(5, 28) + SourceIndex(0)
+2 >Emitted(7, 21) Source(5, 36) + SourceIndex(0)
 ---
 >>>            constructor(greeting) {
 1->^^^^^^^^^^^^
@@ -188,18 +176,18 @@ sourceFile:sourceMapSample.ts
 2 >            constructor(public 
 3 >                        greeting: string
 4 >                                ) 
-1->Emitted(9, 13) Source(5, 9) + SourceIndex(0)
-2 >Emitted(9, 25) Source(5, 28) + SourceIndex(0)
-3 >Emitted(9, 33) Source(5, 44) + SourceIndex(0)
-4 >Emitted(9, 35) Source(5, 46) + SourceIndex(0)
+1->Emitted(8, 13) Source(5, 9) + SourceIndex(0)
+2 >Emitted(8, 25) Source(5, 28) + SourceIndex(0)
+3 >Emitted(8, 33) Source(5, 44) + SourceIndex(0)
+4 >Emitted(8, 35) Source(5, 46) + SourceIndex(0)
 ---
 >>>                this.greeting = greeting;
 1->^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 2 >                                ^^^^^^^^
 1->
 2 >                                greeting
-1->Emitted(10, 33) Source(5, 28) + SourceIndex(0)
-2 >Emitted(10, 41) Source(5, 36) + SourceIndex(0)
+1->Emitted(9, 33) Source(5, 28) + SourceIndex(0)
+2 >Emitted(9, 41) Source(5, 36) + SourceIndex(0)
 ---
 >>>            }
 1 >^^^^^^^^^^^^
@@ -208,8 +196,8 @@ sourceFile:sourceMapSample.ts
 1 >: string) {
 2 >            
   >                    }
-1 >Emitted(11, 13) Source(5, 47) + SourceIndex(0)
-2 >Emitted(11, 14) Source(6, 10) + SourceIndex(0)
+1 >Emitted(10, 13) Source(5, 47) + SourceIndex(0)
+2 >Emitted(10, 14) Source(6, 10) + SourceIndex(0)
 ---
 >>>            greet() {
 1->^^^^^^^^^^^^
@@ -221,9 +209,9 @@ sourceFile:sourceMapSample.ts
   >        
 2 >            greet
 3 >                 () 
-1->Emitted(12, 13) Source(8, 9) + SourceIndex(0)
-2 >Emitted(12, 18) Source(8, 14) + SourceIndex(0)
-3 >Emitted(12, 21) Source(8, 17) + SourceIndex(0)
+1->Emitted(11, 13) Source(8, 9) + SourceIndex(0)
+2 >Emitted(11, 18) Source(8, 14) + SourceIndex(0)
+3 >Emitted(11, 21) Source(8, 17) + SourceIndex(0)
 ---
 >>>                return "<h1>" + this.greeting + "</h1>";
 1->^^^^^^^^^^^^^^^^
@@ -247,16 +235,16 @@ sourceFile:sourceMapSample.ts
 8 >                                              + 
 9 >                                                "</h1>"
 10>                                                       ;
-1->Emitted(13, 17) Source(9, 13) + SourceIndex(0)
-2 >Emitted(13, 24) Source(9, 20) + SourceIndex(0)
-3 >Emitted(13, 30) Source(9, 26) + SourceIndex(0)
-4 >Emitted(13, 33) Source(9, 29) + SourceIndex(0)
-5 >Emitted(13, 37) Source(9, 33) + SourceIndex(0)
-6 >Emitted(13, 38) Source(9, 34) + SourceIndex(0)
-7 >Emitted(13, 46) Source(9, 42) + SourceIndex(0)
-8 >Emitted(13, 49) Source(9, 45) + SourceIndex(0)
-9 >Emitted(13, 56) Source(9, 52) + SourceIndex(0)
-10>Emitted(13, 57) Source(9, 53) + SourceIndex(0)
+1->Emitted(12, 17) Source(9, 13) + SourceIndex(0)
+2 >Emitted(12, 24) Source(9, 20) + SourceIndex(0)
+3 >Emitted(12, 30) Source(9, 26) + SourceIndex(0)
+4 >Emitted(12, 33) Source(9, 29) + SourceIndex(0)
+5 >Emitted(12, 37) Source(9, 33) + SourceIndex(0)
+6 >Emitted(12, 38) Source(9, 34) + SourceIndex(0)
+7 >Emitted(12, 46) Source(9, 42) + SourceIndex(0)
+8 >Emitted(12, 49) Source(9, 45) + SourceIndex(0)
+9 >Emitted(12, 56) Source(9, 52) + SourceIndex(0)
+10>Emitted(12, 57) Source(9, 53) + SourceIndex(0)
 ---
 >>>            }
 1 >^^^^^^^^^^^^
@@ -264,15 +252,15 @@ sourceFile:sourceMapSample.ts
 1 >
 2 >            
   >                    }
-1 >Emitted(14, 13) Source(9, 53) + SourceIndex(0)
-2 >Emitted(14, 14) Source(10, 10) + SourceIndex(0)
+1 >Emitted(13, 13) Source(9, 53) + SourceIndex(0)
+2 >Emitted(13, 14) Source(10, 10) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^^
 2 >         ^^^^^^^^^^^^^^^^^^^^^^^^->
 1 >
   >    }
-1 >Emitted(15, 10) Source(11, 6) + SourceIndex(0)
+1 >Emitted(14, 10) Source(11, 6) + SourceIndex(0)
 ---
 >>>        function foo(greeting) {
 1->^^^^^^^^
@@ -291,12 +279,12 @@ sourceFile:sourceMapSample.ts
 4 >                    (
 5 >                     greeting: string
 6 >                             ): Foo.Bar.Greeter 
-1->Emitted(16, 9) Source(14, 5) + SourceIndex(0)
-2 >Emitted(16, 18) Source(14, 14) + SourceIndex(0)
-3 >Emitted(16, 21) Source(14, 17) + SourceIndex(0)
-4 >Emitted(16, 22) Source(14, 18) + SourceIndex(0)
-5 >Emitted(16, 30) Source(14, 34) + SourceIndex(0)
-6 >Emitted(16, 32) Source(14, 53) + SourceIndex(0)
+1->Emitted(15, 9) Source(14, 5) + SourceIndex(0)
+2 >Emitted(15, 18) Source(14, 14) + SourceIndex(0)
+3 >Emitted(15, 21) Source(14, 17) + SourceIndex(0)
+4 >Emitted(15, 22) Source(14, 18) + SourceIndex(0)
+5 >Emitted(15, 30) Source(14, 34) + SourceIndex(0)
+6 >Emitted(15, 32) Source(14, 53) + SourceIndex(0)
 ---
 >>>            return new Greeter(greeting);
 1->^^^^^^^^^^^^
@@ -316,14 +304,14 @@ sourceFile:sourceMapSample.ts
 6 >                               greeting
 7 >                                       )
 8 >                                        ;
-1->Emitted(17, 13) Source(15, 9) + SourceIndex(0)
-2 >Emitted(17, 20) Source(15, 16) + SourceIndex(0)
-3 >Emitted(17, 24) Source(15, 20) + SourceIndex(0)
-4 >Emitted(17, 31) Source(15, 27) + SourceIndex(0)
-5 >Emitted(17, 32) Source(15, 28) + SourceIndex(0)
-6 >Emitted(17, 40) Source(15, 36) + SourceIndex(0)
-7 >Emitted(17, 41) Source(15, 37) + SourceIndex(0)
-8 >Emitted(17, 42) Source(15, 38) + SourceIndex(0)
+1->Emitted(16, 13) Source(15, 9) + SourceIndex(0)
+2 >Emitted(16, 20) Source(15, 16) + SourceIndex(0)
+3 >Emitted(16, 24) Source(15, 20) + SourceIndex(0)
+4 >Emitted(16, 31) Source(15, 27) + SourceIndex(0)
+5 >Emitted(16, 32) Source(15, 28) + SourceIndex(0)
+6 >Emitted(16, 40) Source(15, 36) + SourceIndex(0)
+7 >Emitted(16, 41) Source(15, 37) + SourceIndex(0)
+8 >Emitted(16, 42) Source(15, 38) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^
@@ -332,8 +320,8 @@ sourceFile:sourceMapSample.ts
 1 >
 2 >        
   >            }
-1 >Emitted(18, 9) Source(15, 38) + SourceIndex(0)
-2 >Emitted(18, 10) Source(16, 6) + SourceIndex(0)
+1 >Emitted(17, 9) Source(15, 38) + SourceIndex(0)
+2 >Emitted(17, 10) Source(16, 6) + SourceIndex(0)
 ---
 >>>        var greeter = new Greeter("Hello, world!");
 1->^^^^^^^^
@@ -358,16 +346,16 @@ sourceFile:sourceMapSample.ts
 8 >                                  "Hello, world!"
 9 >                                                 )
 10>                                                  ;
-1->Emitted(19, 9) Source(18, 5) + SourceIndex(0)
-2 >Emitted(19, 13) Source(18, 9) + SourceIndex(0)
-3 >Emitted(19, 20) Source(18, 16) + SourceIndex(0)
-4 >Emitted(19, 23) Source(18, 19) + SourceIndex(0)
-5 >Emitted(19, 27) Source(18, 23) + SourceIndex(0)
-6 >Emitted(19, 34) Source(18, 30) + SourceIndex(0)
-7 >Emitted(19, 35) Source(18, 31) + SourceIndex(0)
-8 >Emitted(19, 50) Source(18, 46) + SourceIndex(0)
-9 >Emitted(19, 51) Source(18, 47) + SourceIndex(0)
-10>Emitted(19, 52) Source(18, 48) + SourceIndex(0)
+1->Emitted(18, 9) Source(18, 5) + SourceIndex(0)
+2 >Emitted(18, 13) Source(18, 9) + SourceIndex(0)
+3 >Emitted(18, 20) Source(18, 16) + SourceIndex(0)
+4 >Emitted(18, 23) Source(18, 19) + SourceIndex(0)
+5 >Emitted(18, 27) Source(18, 23) + SourceIndex(0)
+6 >Emitted(18, 34) Source(18, 30) + SourceIndex(0)
+7 >Emitted(18, 35) Source(18, 31) + SourceIndex(0)
+8 >Emitted(18, 50) Source(18, 46) + SourceIndex(0)
+9 >Emitted(18, 51) Source(18, 47) + SourceIndex(0)
+10>Emitted(18, 52) Source(18, 48) + SourceIndex(0)
 ---
 >>>        var str = greeter.greet();
 1 >^^^^^^^^
@@ -390,15 +378,15 @@ sourceFile:sourceMapSample.ts
 7 >                          greet
 8 >                               ()
 9 >                                 ;
-1 >Emitted(20, 9) Source(19, 5) + SourceIndex(0)
-2 >Emitted(20, 13) Source(19, 9) + SourceIndex(0)
-3 >Emitted(20, 16) Source(19, 12) + SourceIndex(0)
-4 >Emitted(20, 19) Source(19, 15) + SourceIndex(0)
-5 >Emitted(20, 26) Source(19, 22) + SourceIndex(0)
-6 >Emitted(20, 27) Source(19, 23) + SourceIndex(0)
-7 >Emitted(20, 32) Source(19, 28) + SourceIndex(0)
-8 >Emitted(20, 34) Source(19, 30) + SourceIndex(0)
-9 >Emitted(20, 35) Source(19, 31) + SourceIndex(0)
+1 >Emitted(19, 9) Source(19, 5) + SourceIndex(0)
+2 >Emitted(19, 13) Source(19, 9) + SourceIndex(0)
+3 >Emitted(19, 16) Source(19, 12) + SourceIndex(0)
+4 >Emitted(19, 19) Source(19, 15) + SourceIndex(0)
+5 >Emitted(19, 26) Source(19, 22) + SourceIndex(0)
+6 >Emitted(19, 27) Source(19, 23) + SourceIndex(0)
+7 >Emitted(19, 32) Source(19, 28) + SourceIndex(0)
+8 >Emitted(19, 34) Source(19, 30) + SourceIndex(0)
+9 >Emitted(19, 35) Source(19, 31) + SourceIndex(0)
 ---
 >>>        function foo2(greeting, ...restGreetings) {
 1->^^^^^^^^
@@ -421,15 +409,15 @@ sourceFile:sourceMapSample.ts
 7 >                                ...
 8 >                                   restGreetings: string[]
 9 >                                                ) 
-1->Emitted(21, 9) Source(21, 5) + SourceIndex(0)
-2 >Emitted(21, 18) Source(21, 14) + SourceIndex(0)
-3 >Emitted(21, 22) Source(21, 18) + SourceIndex(0)
-4 >Emitted(21, 23) Source(21, 19) + SourceIndex(0)
-5 >Emitted(21, 31) Source(21, 35) + SourceIndex(0)
-6 >Emitted(21, 33) Source(21, 37) + SourceIndex(0)
-7 >Emitted(21, 36) Source(21, 40) + SourceIndex(0)
-8 >Emitted(21, 49) Source(21, 63) + SourceIndex(0)
-9 >Emitted(21, 51) Source(21, 65) + SourceIndex(0)
+1->Emitted(20, 9) Source(21, 5) + SourceIndex(0)
+2 >Emitted(20, 18) Source(21, 14) + SourceIndex(0)
+3 >Emitted(20, 22) Source(21, 18) + SourceIndex(0)
+4 >Emitted(20, 23) Source(21, 19) + SourceIndex(0)
+5 >Emitted(20, 31) Source(21, 35) + SourceIndex(0)
+6 >Emitted(20, 33) Source(21, 37) + SourceIndex(0)
+7 >Emitted(20, 36) Source(21, 40) + SourceIndex(0)
+8 >Emitted(20, 49) Source(21, 63) + SourceIndex(0)
+9 >Emitted(20, 51) Source(21, 65) + SourceIndex(0)
 ---
 >>>            var greeters = [];
 1 >^^^^^^^^^^^^
@@ -446,12 +434,12 @@ sourceFile:sourceMapSample.ts
 4 >                        : Greeter[] = 
 5 >                           []
 6 >                             ;
-1 >Emitted(22, 13) Source(22, 9) + SourceIndex(0)
-2 >Emitted(22, 17) Source(22, 13) + SourceIndex(0)
-3 >Emitted(22, 25) Source(22, 21) + SourceIndex(0)
-4 >Emitted(22, 28) Source(22, 35) + SourceIndex(0)
-5 >Emitted(22, 30) Source(22, 37) + SourceIndex(0)
-6 >Emitted(22, 31) Source(22, 38) + SourceIndex(0)
+1 >Emitted(21, 13) Source(22, 9) + SourceIndex(0)
+2 >Emitted(21, 17) Source(22, 13) + SourceIndex(0)
+3 >Emitted(21, 25) Source(22, 21) + SourceIndex(0)
+4 >Emitted(21, 28) Source(22, 35) + SourceIndex(0)
+5 >Emitted(21, 30) Source(22, 37) + SourceIndex(0)
+6 >Emitted(21, 31) Source(22, 38) + SourceIndex(0)
 ---
 >>>            greeters[0] = new Greeter(greeting);
 1->^^^^^^^^^^^^
@@ -480,18 +468,18 @@ sourceFile:sourceMapSample.ts
 10>                                      greeting
 11>                                              )
 12>                                               ;
-1->Emitted(23, 13) Source(23, 9) + SourceIndex(0)
-2 >Emitted(23, 21) Source(23, 17) + SourceIndex(0)
-3 >Emitted(23, 22) Source(23, 18) + SourceIndex(0)
-4 >Emitted(23, 23) Source(23, 19) + SourceIndex(0)
-5 >Emitted(23, 24) Source(23, 20) + SourceIndex(0)
-6 >Emitted(23, 27) Source(23, 23) + SourceIndex(0)
-7 >Emitted(23, 31) Source(23, 27) + SourceIndex(0)
-8 >Emitted(23, 38) Source(23, 34) + SourceIndex(0)
-9 >Emitted(23, 39) Source(23, 35) + SourceIndex(0)
-10>Emitted(23, 47) Source(23, 43) + SourceIndex(0)
-11>Emitted(23, 48) Source(23, 44) + SourceIndex(0)
-12>Emitted(23, 49) Source(23, 45) + SourceIndex(0)
+1->Emitted(22, 13) Source(23, 9) + SourceIndex(0)
+2 >Emitted(22, 21) Source(23, 17) + SourceIndex(0)
+3 >Emitted(22, 22) Source(23, 18) + SourceIndex(0)
+4 >Emitted(22, 23) Source(23, 19) + SourceIndex(0)
+5 >Emitted(22, 24) Source(23, 20) + SourceIndex(0)
+6 >Emitted(22, 27) Source(23, 23) + SourceIndex(0)
+7 >Emitted(22, 31) Source(23, 27) + SourceIndex(0)
+8 >Emitted(22, 38) Source(23, 34) + SourceIndex(0)
+9 >Emitted(22, 39) Source(23, 35) + SourceIndex(0)
+10>Emitted(22, 47) Source(23, 43) + SourceIndex(0)
+11>Emitted(22, 48) Source(23, 44) + SourceIndex(0)
+12>Emitted(22, 49) Source(23, 45) + SourceIndex(0)
 ---
 >>>            for (var i = 0; i < restGreetings.length; i++) {
 1->^^^^^^^^^^^^
@@ -530,23 +518,23 @@ sourceFile:sourceMapSample.ts
 15>                                                       ++
 16>                                                         ) 
 17>                                                           {
-1->Emitted(24, 13) Source(24, 9) + SourceIndex(0)
-2 >Emitted(24, 18) Source(24, 14) + SourceIndex(0)
-3 >Emitted(24, 22) Source(24, 18) + SourceIndex(0)
-4 >Emitted(24, 23) Source(24, 19) + SourceIndex(0)
-5 >Emitted(24, 26) Source(24, 22) + SourceIndex(0)
-6 >Emitted(24, 27) Source(24, 23) + SourceIndex(0)
-7 >Emitted(24, 29) Source(24, 25) + SourceIndex(0)
-8 >Emitted(24, 30) Source(24, 26) + SourceIndex(0)
-9 >Emitted(24, 33) Source(24, 29) + SourceIndex(0)
-10>Emitted(24, 46) Source(24, 42) + SourceIndex(0)
-11>Emitted(24, 47) Source(24, 43) + SourceIndex(0)
-12>Emitted(24, 53) Source(24, 49) + SourceIndex(0)
-13>Emitted(24, 55) Source(24, 51) + SourceIndex(0)
-14>Emitted(24, 56) Source(24, 52) + SourceIndex(0)
-15>Emitted(24, 58) Source(24, 54) + SourceIndex(0)
-16>Emitted(24, 60) Source(24, 56) + SourceIndex(0)
-17>Emitted(24, 61) Source(24, 57) + SourceIndex(0)
+1->Emitted(23, 13) Source(24, 9) + SourceIndex(0)
+2 >Emitted(23, 18) Source(24, 14) + SourceIndex(0)
+3 >Emitted(23, 22) Source(24, 18) + SourceIndex(0)
+4 >Emitted(23, 23) Source(24, 19) + SourceIndex(0)
+5 >Emitted(23, 26) Source(24, 22) + SourceIndex(0)
+6 >Emitted(23, 27) Source(24, 23) + SourceIndex(0)
+7 >Emitted(23, 29) Source(24, 25) + SourceIndex(0)
+8 >Emitted(23, 30) Source(24, 26) + SourceIndex(0)
+9 >Emitted(23, 33) Source(24, 29) + SourceIndex(0)
+10>Emitted(23, 46) Source(24, 42) + SourceIndex(0)
+11>Emitted(23, 47) Source(24, 43) + SourceIndex(0)
+12>Emitted(23, 53) Source(24, 49) + SourceIndex(0)
+13>Emitted(23, 55) Source(24, 51) + SourceIndex(0)
+14>Emitted(23, 56) Source(24, 52) + SourceIndex(0)
+15>Emitted(23, 58) Source(24, 54) + SourceIndex(0)
+16>Emitted(23, 60) Source(24, 56) + SourceIndex(0)
+17>Emitted(23, 61) Source(24, 57) + SourceIndex(0)
 ---
 >>>                greeters.push(new Greeter(restGreetings[i]));
 1->^^^^^^^^^^^^^^^^
@@ -580,21 +568,21 @@ sourceFile:sourceMapSample.ts
 13>                                                          )
 14>                                                           )
 15>                                                            ;
-1->Emitted(25, 17) Source(25, 13) + SourceIndex(0)
-2 >Emitted(25, 25) Source(25, 21) + SourceIndex(0)
-3 >Emitted(25, 26) Source(25, 22) + SourceIndex(0)
-4 >Emitted(25, 30) Source(25, 26) + SourceIndex(0)
-5 >Emitted(25, 31) Source(25, 27) + SourceIndex(0)
-6 >Emitted(25, 35) Source(25, 31) + SourceIndex(0)
-7 >Emitted(25, 42) Source(25, 38) + SourceIndex(0)
-8 >Emitted(25, 43) Source(25, 39) + SourceIndex(0)
-9 >Emitted(25, 56) Source(25, 52) + SourceIndex(0)
-10>Emitted(25, 57) Source(25, 53) + SourceIndex(0)
-11>Emitted(25, 58) Source(25, 54) + SourceIndex(0)
-12>Emitted(25, 59) Source(25, 55) + SourceIndex(0)
-13>Emitted(25, 60) Source(25, 56) + SourceIndex(0)
-14>Emitted(25, 61) Source(25, 57) + SourceIndex(0)
-15>Emitted(25, 62) Source(25, 58) + SourceIndex(0)
+1->Emitted(24, 17) Source(25, 13) + SourceIndex(0)
+2 >Emitted(24, 25) Source(25, 21) + SourceIndex(0)
+3 >Emitted(24, 26) Source(25, 22) + SourceIndex(0)
+4 >Emitted(24, 30) Source(25, 26) + SourceIndex(0)
+5 >Emitted(24, 31) Source(25, 27) + SourceIndex(0)
+6 >Emitted(24, 35) Source(25, 31) + SourceIndex(0)
+7 >Emitted(24, 42) Source(25, 38) + SourceIndex(0)
+8 >Emitted(24, 43) Source(25, 39) + SourceIndex(0)
+9 >Emitted(24, 56) Source(25, 52) + SourceIndex(0)
+10>Emitted(24, 57) Source(25, 53) + SourceIndex(0)
+11>Emitted(24, 58) Source(25, 54) + SourceIndex(0)
+12>Emitted(24, 59) Source(25, 55) + SourceIndex(0)
+13>Emitted(24, 60) Source(25, 56) + SourceIndex(0)
+14>Emitted(24, 61) Source(25, 57) + SourceIndex(0)
+15>Emitted(24, 62) Source(25, 58) + SourceIndex(0)
 ---
 >>>            }
 1 >^^^^^^^^^^^^
@@ -603,8 +591,8 @@ sourceFile:sourceMapSample.ts
 1 >
   >        
 2 >            }
-1 >Emitted(26, 13) Source(26, 9) + SourceIndex(0)
-2 >Emitted(26, 14) Source(26, 10) + SourceIndex(0)
+1 >Emitted(25, 13) Source(26, 9) + SourceIndex(0)
+2 >Emitted(25, 14) Source(26, 10) + SourceIndex(0)
 ---
 >>>            return greeters;
 1->^^^^^^^^^^^^
@@ -617,10 +605,10 @@ sourceFile:sourceMapSample.ts
 2 >            return 
 3 >                   greeters
 4 >                           ;
-1->Emitted(27, 13) Source(28, 9) + SourceIndex(0)
-2 >Emitted(27, 20) Source(28, 16) + SourceIndex(0)
-3 >Emitted(27, 28) Source(28, 24) + SourceIndex(0)
-4 >Emitted(27, 29) Source(28, 25) + SourceIndex(0)
+1->Emitted(26, 13) Source(28, 9) + SourceIndex(0)
+2 >Emitted(26, 20) Source(28, 16) + SourceIndex(0)
+3 >Emitted(26, 28) Source(28, 24) + SourceIndex(0)
+4 >Emitted(26, 29) Source(28, 25) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^
@@ -629,8 +617,8 @@ sourceFile:sourceMapSample.ts
 1 >
 2 >        
   >            }
-1 >Emitted(28, 9) Source(28, 25) + SourceIndex(0)
-2 >Emitted(28, 10) Source(29, 6) + SourceIndex(0)
+1 >Emitted(27, 9) Source(28, 25) + SourceIndex(0)
+2 >Emitted(27, 10) Source(29, 6) + SourceIndex(0)
 ---
 >>>        var b = foo2("Hello", "World", "!");
 1->^^^^^^^^
@@ -662,19 +650,19 @@ sourceFile:sourceMapSample.ts
 11>                                       "!"
 12>                                          )
 13>                                           ;
-1->Emitted(29, 9) Source(31, 5) + SourceIndex(0)
-2 >Emitted(29, 13) Source(31, 9) + SourceIndex(0)
-3 >Emitted(29, 14) Source(31, 10) + SourceIndex(0)
-4 >Emitted(29, 17) Source(31, 13) + SourceIndex(0)
-5 >Emitted(29, 21) Source(31, 17) + SourceIndex(0)
-6 >Emitted(29, 22) Source(31, 18) + SourceIndex(0)
-7 >Emitted(29, 29) Source(31, 25) + SourceIndex(0)
-8 >Emitted(29, 31) Source(31, 27) + SourceIndex(0)
-9 >Emitted(29, 38) Source(31, 34) + SourceIndex(0)
-10>Emitted(29, 40) Source(31, 36) + SourceIndex(0)
-11>Emitted(29, 43) Source(31, 39) + SourceIndex(0)
-12>Emitted(29, 44) Source(31, 40) + SourceIndex(0)
-13>Emitted(29, 45) Source(31, 41) + SourceIndex(0)
+1->Emitted(28, 9) Source(31, 5) + SourceIndex(0)
+2 >Emitted(28, 13) Source(31, 9) + SourceIndex(0)
+3 >Emitted(28, 14) Source(31, 10) + SourceIndex(0)
+4 >Emitted(28, 17) Source(31, 13) + SourceIndex(0)
+5 >Emitted(28, 21) Source(31, 17) + SourceIndex(0)
+6 >Emitted(28, 22) Source(31, 18) + SourceIndex(0)
+7 >Emitted(28, 29) Source(31, 25) + SourceIndex(0)
+8 >Emitted(28, 31) Source(31, 27) + SourceIndex(0)
+9 >Emitted(28, 38) Source(31, 34) + SourceIndex(0)
+10>Emitted(28, 40) Source(31, 36) + SourceIndex(0)
+11>Emitted(28, 43) Source(31, 39) + SourceIndex(0)
+12>Emitted(28, 44) Source(31, 40) + SourceIndex(0)
+13>Emitted(28, 45) Source(31, 41) + SourceIndex(0)
 ---
 >>>        for (var j = 0; j < b.length; j++) {
 1->^^^^^^^^
@@ -712,23 +700,23 @@ sourceFile:sourceMapSample.ts
 15>                                       ++
 16>                                         ) 
 17>                                           {
-1->Emitted(30, 9) Source(32, 5) + SourceIndex(0)
-2 >Emitted(30, 14) Source(32, 10) + SourceIndex(0)
-3 >Emitted(30, 18) Source(32, 14) + SourceIndex(0)
-4 >Emitted(30, 19) Source(32, 15) + SourceIndex(0)
-5 >Emitted(30, 22) Source(32, 18) + SourceIndex(0)
-6 >Emitted(30, 23) Source(32, 19) + SourceIndex(0)
-7 >Emitted(30, 25) Source(32, 21) + SourceIndex(0)
-8 >Emitted(30, 26) Source(32, 22) + SourceIndex(0)
-9 >Emitted(30, 29) Source(32, 25) + SourceIndex(0)
-10>Emitted(30, 30) Source(32, 26) + SourceIndex(0)
-11>Emitted(30, 31) Source(32, 27) + SourceIndex(0)
-12>Emitted(30, 37) Source(32, 33) + SourceIndex(0)
-13>Emitted(30, 39) Source(32, 35) + SourceIndex(0)
-14>Emitted(30, 40) Source(32, 36) + SourceIndex(0)
-15>Emitted(30, 42) Source(32, 38) + SourceIndex(0)
-16>Emitted(30, 44) Source(32, 40) + SourceIndex(0)
-17>Emitted(30, 45) Source(32, 41) + SourceIndex(0)
+1->Emitted(29, 9) Source(32, 5) + SourceIndex(0)
+2 >Emitted(29, 14) Source(32, 10) + SourceIndex(0)
+3 >Emitted(29, 18) Source(32, 14) + SourceIndex(0)
+4 >Emitted(29, 19) Source(32, 15) + SourceIndex(0)
+5 >Emitted(29, 22) Source(32, 18) + SourceIndex(0)
+6 >Emitted(29, 23) Source(32, 19) + SourceIndex(0)
+7 >Emitted(29, 25) Source(32, 21) + SourceIndex(0)
+8 >Emitted(29, 26) Source(32, 22) + SourceIndex(0)
+9 >Emitted(29, 29) Source(32, 25) + SourceIndex(0)
+10>Emitted(29, 30) Source(32, 26) + SourceIndex(0)
+11>Emitted(29, 31) Source(32, 27) + SourceIndex(0)
+12>Emitted(29, 37) Source(32, 33) + SourceIndex(0)
+13>Emitted(29, 39) Source(32, 35) + SourceIndex(0)
+14>Emitted(29, 40) Source(32, 36) + SourceIndex(0)
+15>Emitted(29, 42) Source(32, 38) + SourceIndex(0)
+16>Emitted(29, 44) Source(32, 40) + SourceIndex(0)
+17>Emitted(29, 45) Source(32, 41) + SourceIndex(0)
 ---
 >>>            b[j].greet();
 1 >^^^^^^^^^^^^
@@ -750,15 +738,15 @@ sourceFile:sourceMapSample.ts
 7 >                 greet
 8 >                      ()
 9 >                        ;
-1 >Emitted(31, 13) Source(33, 9) + SourceIndex(0)
-2 >Emitted(31, 14) Source(33, 10) + SourceIndex(0)
-3 >Emitted(31, 15) Source(33, 11) + SourceIndex(0)
-4 >Emitted(31, 16) Source(33, 12) + SourceIndex(0)
-5 >Emitted(31, 17) Source(33, 13) + SourceIndex(0)
-6 >Emitted(31, 18) Source(33, 14) + SourceIndex(0)
-7 >Emitted(31, 23) Source(33, 19) + SourceIndex(0)
-8 >Emitted(31, 25) Source(33, 21) + SourceIndex(0)
-9 >Emitted(31, 26) Source(33, 22) + SourceIndex(0)
+1 >Emitted(30, 13) Source(33, 9) + SourceIndex(0)
+2 >Emitted(30, 14) Source(33, 10) + SourceIndex(0)
+3 >Emitted(30, 15) Source(33, 11) + SourceIndex(0)
+4 >Emitted(30, 16) Source(33, 12) + SourceIndex(0)
+5 >Emitted(30, 17) Source(33, 13) + SourceIndex(0)
+6 >Emitted(30, 18) Source(33, 14) + SourceIndex(0)
+7 >Emitted(30, 23) Source(33, 19) + SourceIndex(0)
+8 >Emitted(30, 25) Source(33, 21) + SourceIndex(0)
+9 >Emitted(30, 26) Source(33, 22) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^
@@ -767,8 +755,8 @@ sourceFile:sourceMapSample.ts
 1 >
   >    
 2 >        }
-1 >Emitted(32, 9) Source(34, 5) + SourceIndex(0)
-2 >Emitted(32, 10) Source(34, 6) + SourceIndex(0)
+1 >Emitted(31, 9) Source(34, 5) + SourceIndex(0)
+2 >Emitted(31, 10) Source(34, 6) + SourceIndex(0)
 ---
 >>>    })(Bar = Foo.Bar || (Foo.Bar = {}));
 1->^^^^
@@ -828,17 +816,17 @@ sourceFile:sourceMapSample.ts
   >                                        b[j].greet();
   >                                    }
   >                                }
-1->Emitted(33, 5) Source(34, 6) + SourceIndex(0)
-2 >Emitted(33, 6) Source(35, 2) + SourceIndex(0)
-3 >Emitted(33, 8) Source(1, 12) + SourceIndex(0)
-4 >Emitted(33, 11) Source(1, 15) + SourceIndex(0)
-5 >Emitted(33, 14) Source(1, 12) + SourceIndex(0)
-6 >Emitted(33, 18) Source(1, 12) + SourceIndex(0)
-7 >Emitted(33, 21) Source(1, 15) + SourceIndex(0)
-8 >Emitted(33, 26) Source(1, 12) + SourceIndex(0)
-9 >Emitted(33, 30) Source(1, 12) + SourceIndex(0)
-10>Emitted(33, 33) Source(1, 15) + SourceIndex(0)
-11>Emitted(33, 41) Source(35, 2) + SourceIndex(0)
+1->Emitted(32, 5) Source(34, 6) + SourceIndex(0)
+2 >Emitted(32, 6) Source(35, 2) + SourceIndex(0)
+3 >Emitted(32, 8) Source(1, 12) + SourceIndex(0)
+4 >Emitted(32, 11) Source(1, 15) + SourceIndex(0)
+5 >Emitted(32, 14) Source(1, 12) + SourceIndex(0)
+6 >Emitted(32, 18) Source(1, 12) + SourceIndex(0)
+7 >Emitted(32, 21) Source(1, 15) + SourceIndex(0)
+8 >Emitted(32, 26) Source(1, 12) + SourceIndex(0)
+9 >Emitted(32, 30) Source(1, 12) + SourceIndex(0)
+10>Emitted(32, 33) Source(1, 15) + SourceIndex(0)
+11>Emitted(32, 41) Source(35, 2) + SourceIndex(0)
 ---
 >>>})(Foo || (Foo = {}));
 1 >
@@ -893,13 +881,13 @@ sourceFile:sourceMapSample.ts
   >                      b[j].greet();
   >                  }
   >              }
-1 >Emitted(34, 1) Source(34, 6) + SourceIndex(0)
-2 >Emitted(34, 2) Source(35, 1) + SourceIndex(0)
-3 >Emitted(34, 2) Source(1, 1) + SourceIndex(0)
-4 >Emitted(34, 4) Source(1, 8) + SourceIndex(0)
-5 >Emitted(34, 7) Source(1, 11) + SourceIndex(0)
-6 >Emitted(34, 12) Source(1, 8) + SourceIndex(0)
-7 >Emitted(34, 15) Source(1, 11) + SourceIndex(0)
-8 >Emitted(34, 23) Source(35, 2) + SourceIndex(0)
+1 >Emitted(33, 1) Source(34, 6) + SourceIndex(0)
+2 >Emitted(33, 2) Source(35, 1) + SourceIndex(0)
+3 >Emitted(33, 2) Source(1, 1) + SourceIndex(0)
+4 >Emitted(33, 4) Source(1, 8) + SourceIndex(0)
+5 >Emitted(33, 7) Source(1, 11) + SourceIndex(0)
+6 >Emitted(33, 12) Source(1, 8) + SourceIndex(0)
+7 >Emitted(33, 15) Source(1, 11) + SourceIndex(0)
+8 >Emitted(33, 23) Source(35, 2) + SourceIndex(0)
 ---
 >>>//# sourceMappingURL=sourceMapSample.js.map
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt.diff b/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt.diff
index d18d2c6205..29d376aee0 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt.diff
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt.diff
@@ -208,30 +208,13 @@
  1->^^^^^^^^
  2 >        ^^^^^^^^^^^^
  3 >                    ^
--4 >                     ^^^->
+ 4 >                     ^^^->
 -1-> {
-+4 >                     ^->
 +1->{
    >    
  2 >        "use strict"
  3 >                    ;
-@@= skipped -130, +130 lines =@@
- 2 >Emitted(5, 21) Source(2, 17) + SourceIndex(0)
- 3 >Emitted(5, 22) Source(2, 18) + SourceIndex(0)
- ---
-+>>>        "use strict";
-+1->^^^^^^^^
-+2 >        ^^^^^^^^^^^^
-+3 >                    ^
-+4 >                     ^^^->
-+1->
-+2 >        "use strict"
-+3 >                    ;
-+1->Emitted(6, 9) Source(2, 5) + SourceIndex(0)
-+2 >Emitted(6, 21) Source(2, 17) + SourceIndex(0)
-+3 >Emitted(6, 22) Source(2, 18) + SourceIndex(0)
-+---
- >>>        class Greeter {
+@@= skipped -134, +134 lines =@@
  1->^^^^^^^^
  2 >        ^^^^^^
  3 >              ^^^^^^^
@@ -240,15 +223,10 @@
  1->
    >
    >    
- 2 >        class 
- 3 >              Greeter
--1->Emitted(6, 9) Source(4, 5) + SourceIndex(0)
--2 >Emitted(6, 15) Source(4, 11) + SourceIndex(0)
--3 >Emitted(6, 22) Source(4, 18) + SourceIndex(0)
-+1->Emitted(7, 9) Source(4, 5) + SourceIndex(0)
-+2 >Emitted(7, 15) Source(4, 11) + SourceIndex(0)
-+3 >Emitted(7, 22) Source(4, 18) + SourceIndex(0)
-+---
+@@= skipped -10, +10 lines =@@
+ 2 >Emitted(6, 15) Source(4, 11) + SourceIndex(0)
+ 3 >Emitted(6, 22) Source(4, 18) + SourceIndex(0)
+ ---
 +>>>            greeting;
 +1->^^^^^^^^^^^^
 +2 >            ^^^^^^^^
@@ -256,9 +234,9 @@
 +1-> {
 +  >        constructor(public 
 +2 >            greeting
-+1->Emitted(8, 13) Source(5, 28) + SourceIndex(0)
-+2 >Emitted(8, 21) Source(5, 36) + SourceIndex(0)
- ---
++1->Emitted(7, 13) Source(5, 28) + SourceIndex(0)
++2 >Emitted(7, 21) Source(5, 36) + SourceIndex(0)
++---
  >>>            constructor(greeting) {
  1->^^^^^^^^^^^^
  2 >            ^^^^^^^^^^^^
@@ -275,10 +253,10 @@
 -2 >Emitted(7, 25) Source(5, 28) + SourceIndex(0)
 -3 >Emitted(7, 33) Source(5, 44) + SourceIndex(0)
 +4 >                                ) 
-+1->Emitted(9, 13) Source(5, 9) + SourceIndex(0)
-+2 >Emitted(9, 25) Source(5, 28) + SourceIndex(0)
-+3 >Emitted(9, 33) Source(5, 44) + SourceIndex(0)
-+4 >Emitted(9, 35) Source(5, 46) + SourceIndex(0)
++1->Emitted(8, 13) Source(5, 9) + SourceIndex(0)
++2 >Emitted(8, 25) Source(5, 28) + SourceIndex(0)
++3 >Emitted(8, 33) Source(5, 44) + SourceIndex(0)
++4 >Emitted(8, 35) Source(5, 46) + SourceIndex(0)
  ---
  >>>                this.greeting = greeting;
 -1->^^^^^^^^^^^^^^^^
@@ -299,8 +277,8 @@
 -4 >Emitted(8, 41) Source(5, 36) + SourceIndex(0)
 -5 >Emitted(8, 42) Source(5, 44) + SourceIndex(0)
 +2 >                                greeting
-+1->Emitted(10, 33) Source(5, 28) + SourceIndex(0)
-+2 >Emitted(10, 41) Source(5, 36) + SourceIndex(0)
++1->Emitted(9, 33) Source(5, 28) + SourceIndex(0)
++2 >Emitted(9, 41) Source(5, 36) + SourceIndex(0)
  ---
  >>>            }
  1 >^^^^^^^^^^^^
@@ -314,8 +292,8 @@
 +1 >: string) {
 +2 >            
 +  >                    }
-+1 >Emitted(11, 13) Source(5, 47) + SourceIndex(0)
-+2 >Emitted(11, 14) Source(6, 10) + SourceIndex(0)
++1 >Emitted(10, 13) Source(5, 47) + SourceIndex(0)
++2 >Emitted(10, 14) Source(6, 10) + SourceIndex(0)
  ---
  >>>            greet() {
  1->^^^^^^^^^^^^
@@ -330,13 +308,13 @@
 -1->Emitted(10, 13) Source(8, 9) + SourceIndex(0)
 -2 >Emitted(10, 18) Source(8, 14) + SourceIndex(0)
 +3 >                 () 
-+1->Emitted(12, 13) Source(8, 9) + SourceIndex(0)
-+2 >Emitted(12, 18) Source(8, 14) + SourceIndex(0)
-+3 >Emitted(12, 21) Source(8, 17) + SourceIndex(0)
++1->Emitted(11, 13) Source(8, 9) + SourceIndex(0)
++2 >Emitted(11, 18) Source(8, 14) + SourceIndex(0)
++3 >Emitted(11, 21) Source(8, 17) + SourceIndex(0)
  ---
  >>>                return "<h1>" + this.greeting + "</h1>";
  1->^^^^^^^^^^^^^^^^
-@@= skipped -76, +94 lines =@@
+@@= skipped -62, +68 lines =@@
  8 >                                             ^^^
  9 >                                                ^^^^^^^
  10>                                                       ^
@@ -359,16 +337,16 @@
 -8 >Emitted(11, 49) Source(9, 45) + SourceIndex(0)
 -9 >Emitted(11, 56) Source(9, 52) + SourceIndex(0)
 -10>Emitted(11, 57) Source(9, 53) + SourceIndex(0)
-+1->Emitted(13, 17) Source(9, 13) + SourceIndex(0)
-+2 >Emitted(13, 24) Source(9, 20) + SourceIndex(0)
-+3 >Emitted(13, 30) Source(9, 26) + SourceIndex(0)
-+4 >Emitted(13, 33) Source(9, 29) + SourceIndex(0)
-+5 >Emitted(13, 37) Source(9, 33) + SourceIndex(0)
-+6 >Emitted(13, 38) Source(9, 34) + SourceIndex(0)
-+7 >Emitted(13, 46) Source(9, 42) + SourceIndex(0)
-+8 >Emitted(13, 49) Source(9, 45) + SourceIndex(0)
-+9 >Emitted(13, 56) Source(9, 52) + SourceIndex(0)
-+10>Emitted(13, 57) Source(9, 53) + SourceIndex(0)
++1->Emitted(12, 17) Source(9, 13) + SourceIndex(0)
++2 >Emitted(12, 24) Source(9, 20) + SourceIndex(0)
++3 >Emitted(12, 30) Source(9, 26) + SourceIndex(0)
++4 >Emitted(12, 33) Source(9, 29) + SourceIndex(0)
++5 >Emitted(12, 37) Source(9, 33) + SourceIndex(0)
++6 >Emitted(12, 38) Source(9, 34) + SourceIndex(0)
++7 >Emitted(12, 46) Source(9, 42) + SourceIndex(0)
++8 >Emitted(12, 49) Source(9, 45) + SourceIndex(0)
++9 >Emitted(12, 56) Source(9, 52) + SourceIndex(0)
++10>Emitted(12, 57) Source(9, 53) + SourceIndex(0)
  ---
  >>>            }
  1 >^^^^^^^^^^^^
@@ -380,8 +358,8 @@
 -2 >Emitted(12, 14) Source(10, 10) + SourceIndex(0)
 +2 >            
 +  >                    }
-+1 >Emitted(14, 13) Source(9, 53) + SourceIndex(0)
-+2 >Emitted(14, 14) Source(10, 10) + SourceIndex(0)
++1 >Emitted(13, 13) Source(9, 53) + SourceIndex(0)
++2 >Emitted(13, 14) Source(10, 10) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^^
@@ -389,7 +367,7 @@
  1 >
    >    }
 -1 >Emitted(13, 10) Source(11, 6) + SourceIndex(0)
-+1 >Emitted(15, 10) Source(11, 6) + SourceIndex(0)
++1 >Emitted(14, 10) Source(11, 6) + SourceIndex(0)
  ---
  >>>        function foo(greeting) {
  1->^^^^^^^^
@@ -413,12 +391,12 @@
 -4 >Emitted(14, 22) Source(14, 18) + SourceIndex(0)
 -5 >Emitted(14, 30) Source(14, 34) + SourceIndex(0)
 +6 >                             ): Foo.Bar.Greeter 
-+1->Emitted(16, 9) Source(14, 5) + SourceIndex(0)
-+2 >Emitted(16, 18) Source(14, 14) + SourceIndex(0)
-+3 >Emitted(16, 21) Source(14, 17) + SourceIndex(0)
-+4 >Emitted(16, 22) Source(14, 18) + SourceIndex(0)
-+5 >Emitted(16, 30) Source(14, 34) + SourceIndex(0)
-+6 >Emitted(16, 32) Source(14, 53) + SourceIndex(0)
++1->Emitted(15, 9) Source(14, 5) + SourceIndex(0)
++2 >Emitted(15, 18) Source(14, 14) + SourceIndex(0)
++3 >Emitted(15, 21) Source(14, 17) + SourceIndex(0)
++4 >Emitted(15, 22) Source(14, 18) + SourceIndex(0)
++5 >Emitted(15, 30) Source(14, 34) + SourceIndex(0)
++6 >Emitted(15, 32) Source(14, 53) + SourceIndex(0)
  ---
  >>>            return new Greeter(greeting);
  1->^^^^^^^^^^^^
@@ -443,14 +421,14 @@
 -6 >Emitted(15, 40) Source(15, 36) + SourceIndex(0)
 -7 >Emitted(15, 41) Source(15, 37) + SourceIndex(0)
 -8 >Emitted(15, 42) Source(15, 38) + SourceIndex(0)
-+1->Emitted(17, 13) Source(15, 9) + SourceIndex(0)
-+2 >Emitted(17, 20) Source(15, 16) + SourceIndex(0)
-+3 >Emitted(17, 24) Source(15, 20) + SourceIndex(0)
-+4 >Emitted(17, 31) Source(15, 27) + SourceIndex(0)
-+5 >Emitted(17, 32) Source(15, 28) + SourceIndex(0)
-+6 >Emitted(17, 40) Source(15, 36) + SourceIndex(0)
-+7 >Emitted(17, 41) Source(15, 37) + SourceIndex(0)
-+8 >Emitted(17, 42) Source(15, 38) + SourceIndex(0)
++1->Emitted(16, 13) Source(15, 9) + SourceIndex(0)
++2 >Emitted(16, 20) Source(15, 16) + SourceIndex(0)
++3 >Emitted(16, 24) Source(15, 20) + SourceIndex(0)
++4 >Emitted(16, 31) Source(15, 27) + SourceIndex(0)
++5 >Emitted(16, 32) Source(15, 28) + SourceIndex(0)
++6 >Emitted(16, 40) Source(15, 36) + SourceIndex(0)
++7 >Emitted(16, 41) Source(15, 37) + SourceIndex(0)
++8 >Emitted(16, 42) Source(15, 38) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^
@@ -463,8 +441,8 @@
 -2 >Emitted(16, 10) Source(16, 6) + SourceIndex(0)
 +2 >        
 +  >            }
-+1 >Emitted(18, 9) Source(15, 38) + SourceIndex(0)
-+2 >Emitted(18, 10) Source(16, 6) + SourceIndex(0)
++1 >Emitted(17, 9) Source(15, 38) + SourceIndex(0)
++2 >Emitted(17, 10) Source(16, 6) + SourceIndex(0)
  ---
  >>>        var greeter = new Greeter("Hello, world!");
  1->^^^^^^^^
@@ -482,16 +460,16 @@
 -8 >Emitted(17, 50) Source(18, 46) + SourceIndex(0)
 -9 >Emitted(17, 51) Source(18, 47) + SourceIndex(0)
 -10>Emitted(17, 52) Source(18, 48) + SourceIndex(0)
-+1->Emitted(19, 9) Source(18, 5) + SourceIndex(0)
-+2 >Emitted(19, 13) Source(18, 9) + SourceIndex(0)
-+3 >Emitted(19, 20) Source(18, 16) + SourceIndex(0)
-+4 >Emitted(19, 23) Source(18, 19) + SourceIndex(0)
-+5 >Emitted(19, 27) Source(18, 23) + SourceIndex(0)
-+6 >Emitted(19, 34) Source(18, 30) + SourceIndex(0)
-+7 >Emitted(19, 35) Source(18, 31) + SourceIndex(0)
-+8 >Emitted(19, 50) Source(18, 46) + SourceIndex(0)
-+9 >Emitted(19, 51) Source(18, 47) + SourceIndex(0)
-+10>Emitted(19, 52) Source(18, 48) + SourceIndex(0)
++1->Emitted(18, 9) Source(18, 5) + SourceIndex(0)
++2 >Emitted(18, 13) Source(18, 9) + SourceIndex(0)
++3 >Emitted(18, 20) Source(18, 16) + SourceIndex(0)
++4 >Emitted(18, 23) Source(18, 19) + SourceIndex(0)
++5 >Emitted(18, 27) Source(18, 23) + SourceIndex(0)
++6 >Emitted(18, 34) Source(18, 30) + SourceIndex(0)
++7 >Emitted(18, 35) Source(18, 31) + SourceIndex(0)
++8 >Emitted(18, 50) Source(18, 46) + SourceIndex(0)
++9 >Emitted(18, 51) Source(18, 47) + SourceIndex(0)
++10>Emitted(18, 52) Source(18, 48) + SourceIndex(0)
  ---
  >>>        var str = greeter.greet();
  1 >^^^^^^^^
@@ -508,15 +486,15 @@
 -7 >Emitted(18, 32) Source(19, 28) + SourceIndex(0)
 -8 >Emitted(18, 34) Source(19, 30) + SourceIndex(0)
 -9 >Emitted(18, 35) Source(19, 31) + SourceIndex(0)
-+1 >Emitted(20, 9) Source(19, 5) + SourceIndex(0)
-+2 >Emitted(20, 13) Source(19, 9) + SourceIndex(0)
-+3 >Emitted(20, 16) Source(19, 12) + SourceIndex(0)
-+4 >Emitted(20, 19) Source(19, 15) + SourceIndex(0)
-+5 >Emitted(20, 26) Source(19, 22) + SourceIndex(0)
-+6 >Emitted(20, 27) Source(19, 23) + SourceIndex(0)
-+7 >Emitted(20, 32) Source(19, 28) + SourceIndex(0)
-+8 >Emitted(20, 34) Source(19, 30) + SourceIndex(0)
-+9 >Emitted(20, 35) Source(19, 31) + SourceIndex(0)
++1 >Emitted(19, 9) Source(19, 5) + SourceIndex(0)
++2 >Emitted(19, 13) Source(19, 9) + SourceIndex(0)
++3 >Emitted(19, 16) Source(19, 12) + SourceIndex(0)
++4 >Emitted(19, 19) Source(19, 15) + SourceIndex(0)
++5 >Emitted(19, 26) Source(19, 22) + SourceIndex(0)
++6 >Emitted(19, 27) Source(19, 23) + SourceIndex(0)
++7 >Emitted(19, 32) Source(19, 28) + SourceIndex(0)
++8 >Emitted(19, 34) Source(19, 30) + SourceIndex(0)
++9 >Emitted(19, 35) Source(19, 31) + SourceIndex(0)
  ---
  >>>        function foo2(greeting, ...restGreetings) {
  1->^^^^^^^^
@@ -541,15 +519,15 @@
 -7 >Emitted(19, 36) Source(21, 40) + SourceIndex(0)
 -8 >Emitted(19, 49) Source(21, 63) + SourceIndex(0)
 +9 >                                                ) 
-+1->Emitted(21, 9) Source(21, 5) + SourceIndex(0)
-+2 >Emitted(21, 18) Source(21, 14) + SourceIndex(0)
-+3 >Emitted(21, 22) Source(21, 18) + SourceIndex(0)
-+4 >Emitted(21, 23) Source(21, 19) + SourceIndex(0)
-+5 >Emitted(21, 31) Source(21, 35) + SourceIndex(0)
-+6 >Emitted(21, 33) Source(21, 37) + SourceIndex(0)
-+7 >Emitted(21, 36) Source(21, 40) + SourceIndex(0)
-+8 >Emitted(21, 49) Source(21, 63) + SourceIndex(0)
-+9 >Emitted(21, 51) Source(21, 65) + SourceIndex(0)
++1->Emitted(20, 9) Source(21, 5) + SourceIndex(0)
++2 >Emitted(20, 18) Source(21, 14) + SourceIndex(0)
++3 >Emitted(20, 22) Source(21, 18) + SourceIndex(0)
++4 >Emitted(20, 23) Source(21, 19) + SourceIndex(0)
++5 >Emitted(20, 31) Source(21, 35) + SourceIndex(0)
++6 >Emitted(20, 33) Source(21, 37) + SourceIndex(0)
++7 >Emitted(20, 36) Source(21, 40) + SourceIndex(0)
++8 >Emitted(20, 49) Source(21, 63) + SourceIndex(0)
++9 >Emitted(20, 51) Source(21, 65) + SourceIndex(0)
  ---
  >>>            var greeters = [];
  1 >^^^^^^^^^^^^
@@ -571,12 +549,12 @@
 -4 >Emitted(20, 28) Source(22, 35) + SourceIndex(0)
 -5 >Emitted(20, 30) Source(22, 37) + SourceIndex(0)
 -6 >Emitted(20, 31) Source(22, 38) + SourceIndex(0)
-+1 >Emitted(22, 13) Source(22, 9) + SourceIndex(0)
-+2 >Emitted(22, 17) Source(22, 13) + SourceIndex(0)
-+3 >Emitted(22, 25) Source(22, 21) + SourceIndex(0)
-+4 >Emitted(22, 28) Source(22, 35) + SourceIndex(0)
-+5 >Emitted(22, 30) Source(22, 37) + SourceIndex(0)
-+6 >Emitted(22, 31) Source(22, 38) + SourceIndex(0)
++1 >Emitted(21, 13) Source(22, 9) + SourceIndex(0)
++2 >Emitted(21, 17) Source(22, 13) + SourceIndex(0)
++3 >Emitted(21, 25) Source(22, 21) + SourceIndex(0)
++4 >Emitted(21, 28) Source(22, 35) + SourceIndex(0)
++5 >Emitted(21, 30) Source(22, 37) + SourceIndex(0)
++6 >Emitted(21, 31) Source(22, 38) + SourceIndex(0)
  ---
  >>>            greeters[0] = new Greeter(greeting);
  1->^^^^^^^^^^^^
@@ -596,18 +574,18 @@
 -10>Emitted(21, 47) Source(23, 43) + SourceIndex(0)
 -11>Emitted(21, 48) Source(23, 44) + SourceIndex(0)
 -12>Emitted(21, 49) Source(23, 45) + SourceIndex(0)
-+1->Emitted(23, 13) Source(23, 9) + SourceIndex(0)
-+2 >Emitted(23, 21) Source(23, 17) + SourceIndex(0)
-+3 >Emitted(23, 22) Source(23, 18) + SourceIndex(0)
-+4 >Emitted(23, 23) Source(23, 19) + SourceIndex(0)
-+5 >Emitted(23, 24) Source(23, 20) + SourceIndex(0)
-+6 >Emitted(23, 27) Source(23, 23) + SourceIndex(0)
-+7 >Emitted(23, 31) Source(23, 27) + SourceIndex(0)
-+8 >Emitted(23, 38) Source(23, 34) + SourceIndex(0)
-+9 >Emitted(23, 39) Source(23, 35) + SourceIndex(0)
-+10>Emitted(23, 47) Source(23, 43) + SourceIndex(0)
-+11>Emitted(23, 48) Source(23, 44) + SourceIndex(0)
-+12>Emitted(23, 49) Source(23, 45) + SourceIndex(0)
++1->Emitted(22, 13) Source(23, 9) + SourceIndex(0)
++2 >Emitted(22, 21) Source(23, 17) + SourceIndex(0)
++3 >Emitted(22, 22) Source(23, 18) + SourceIndex(0)
++4 >Emitted(22, 23) Source(23, 19) + SourceIndex(0)
++5 >Emitted(22, 24) Source(23, 20) + SourceIndex(0)
++6 >Emitted(22, 27) Source(23, 23) + SourceIndex(0)
++7 >Emitted(22, 31) Source(23, 27) + SourceIndex(0)
++8 >Emitted(22, 38) Source(23, 34) + SourceIndex(0)
++9 >Emitted(22, 39) Source(23, 35) + SourceIndex(0)
++10>Emitted(22, 47) Source(23, 43) + SourceIndex(0)
++11>Emitted(22, 48) Source(23, 44) + SourceIndex(0)
++12>Emitted(22, 49) Source(23, 45) + SourceIndex(0)
  ---
  >>>            for (var i = 0; i < restGreetings.length; i++) {
  1->^^^^^^^^^^^^
@@ -632,23 +610,23 @@
 -15>Emitted(22, 58) Source(24, 54) + SourceIndex(0)
 -16>Emitted(22, 60) Source(24, 56) + SourceIndex(0)
 -17>Emitted(22, 61) Source(24, 57) + SourceIndex(0)
-+1->Emitted(24, 13) Source(24, 9) + SourceIndex(0)
-+2 >Emitted(24, 18) Source(24, 14) + SourceIndex(0)
-+3 >Emitted(24, 22) Source(24, 18) + SourceIndex(0)
-+4 >Emitted(24, 23) Source(24, 19) + SourceIndex(0)
-+5 >Emitted(24, 26) Source(24, 22) + SourceIndex(0)
-+6 >Emitted(24, 27) Source(24, 23) + SourceIndex(0)
-+7 >Emitted(24, 29) Source(24, 25) + SourceIndex(0)
-+8 >Emitted(24, 30) Source(24, 26) + SourceIndex(0)
-+9 >Emitted(24, 33) Source(24, 29) + SourceIndex(0)
-+10>Emitted(24, 46) Source(24, 42) + SourceIndex(0)
-+11>Emitted(24, 47) Source(24, 43) + SourceIndex(0)
-+12>Emitted(24, 53) Source(24, 49) + SourceIndex(0)
-+13>Emitted(24, 55) Source(24, 51) + SourceIndex(0)
-+14>Emitted(24, 56) Source(24, 52) + SourceIndex(0)
-+15>Emitted(24, 58) Source(24, 54) + SourceIndex(0)
-+16>Emitted(24, 60) Source(24, 56) + SourceIndex(0)
-+17>Emitted(24, 61) Source(24, 57) + SourceIndex(0)
++1->Emitted(23, 13) Source(24, 9) + SourceIndex(0)
++2 >Emitted(23, 18) Source(24, 14) + SourceIndex(0)
++3 >Emitted(23, 22) Source(24, 18) + SourceIndex(0)
++4 >Emitted(23, 23) Source(24, 19) + SourceIndex(0)
++5 >Emitted(23, 26) Source(24, 22) + SourceIndex(0)
++6 >Emitted(23, 27) Source(24, 23) + SourceIndex(0)
++7 >Emitted(23, 29) Source(24, 25) + SourceIndex(0)
++8 >Emitted(23, 30) Source(24, 26) + SourceIndex(0)
++9 >Emitted(23, 33) Source(24, 29) + SourceIndex(0)
++10>Emitted(23, 46) Source(24, 42) + SourceIndex(0)
++11>Emitted(23, 47) Source(24, 43) + SourceIndex(0)
++12>Emitted(23, 53) Source(24, 49) + SourceIndex(0)
++13>Emitted(23, 55) Source(24, 51) + SourceIndex(0)
++14>Emitted(23, 56) Source(24, 52) + SourceIndex(0)
++15>Emitted(23, 58) Source(24, 54) + SourceIndex(0)
++16>Emitted(23, 60) Source(24, 56) + SourceIndex(0)
++17>Emitted(23, 61) Source(24, 57) + SourceIndex(0)
  ---
  >>>                greeters.push(new Greeter(restGreetings[i]));
  1->^^^^^^^^^^^^^^^^
@@ -671,21 +649,21 @@
 -13>Emitted(23, 60) Source(25, 56) + SourceIndex(0)
 -14>Emitted(23, 61) Source(25, 57) + SourceIndex(0)
 -15>Emitted(23, 62) Source(25, 58) + SourceIndex(0)
-+1->Emitted(25, 17) Source(25, 13) + SourceIndex(0)
-+2 >Emitted(25, 25) Source(25, 21) + SourceIndex(0)
-+3 >Emitted(25, 26) Source(25, 22) + SourceIndex(0)
-+4 >Emitted(25, 30) Source(25, 26) + SourceIndex(0)
-+5 >Emitted(25, 31) Source(25, 27) + SourceIndex(0)
-+6 >Emitted(25, 35) Source(25, 31) + SourceIndex(0)
-+7 >Emitted(25, 42) Source(25, 38) + SourceIndex(0)
-+8 >Emitted(25, 43) Source(25, 39) + SourceIndex(0)
-+9 >Emitted(25, 56) Source(25, 52) + SourceIndex(0)
-+10>Emitted(25, 57) Source(25, 53) + SourceIndex(0)
-+11>Emitted(25, 58) Source(25, 54) + SourceIndex(0)
-+12>Emitted(25, 59) Source(25, 55) + SourceIndex(0)
-+13>Emitted(25, 60) Source(25, 56) + SourceIndex(0)
-+14>Emitted(25, 61) Source(25, 57) + SourceIndex(0)
-+15>Emitted(25, 62) Source(25, 58) + SourceIndex(0)
++1->Emitted(24, 17) Source(25, 13) + SourceIndex(0)
++2 >Emitted(24, 25) Source(25, 21) + SourceIndex(0)
++3 >Emitted(24, 26) Source(25, 22) + SourceIndex(0)
++4 >Emitted(24, 30) Source(25, 26) + SourceIndex(0)
++5 >Emitted(24, 31) Source(25, 27) + SourceIndex(0)
++6 >Emitted(24, 35) Source(25, 31) + SourceIndex(0)
++7 >Emitted(24, 42) Source(25, 38) + SourceIndex(0)
++8 >Emitted(24, 43) Source(25, 39) + SourceIndex(0)
++9 >Emitted(24, 56) Source(25, 52) + SourceIndex(0)
++10>Emitted(24, 57) Source(25, 53) + SourceIndex(0)
++11>Emitted(24, 58) Source(25, 54) + SourceIndex(0)
++12>Emitted(24, 59) Source(25, 55) + SourceIndex(0)
++13>Emitted(24, 60) Source(25, 56) + SourceIndex(0)
++14>Emitted(24, 61) Source(25, 57) + SourceIndex(0)
++15>Emitted(24, 62) Source(25, 58) + SourceIndex(0)
  ---
  >>>            }
  1 >^^^^^^^^^^^^
@@ -695,8 +673,8 @@
  2 >            }
 -1 >Emitted(24, 13) Source(26, 9) + SourceIndex(0)
 -2 >Emitted(24, 14) Source(26, 10) + SourceIndex(0)
-+1 >Emitted(26, 13) Source(26, 9) + SourceIndex(0)
-+2 >Emitted(26, 14) Source(26, 10) + SourceIndex(0)
++1 >Emitted(25, 13) Source(26, 9) + SourceIndex(0)
++2 >Emitted(25, 14) Source(26, 10) + SourceIndex(0)
  ---
  >>>            return greeters;
  1->^^^^^^^^^^^^
@@ -708,10 +686,10 @@
 -2 >Emitted(25, 20) Source(28, 16) + SourceIndex(0)
 -3 >Emitted(25, 28) Source(28, 24) + SourceIndex(0)
 -4 >Emitted(25, 29) Source(28, 25) + SourceIndex(0)
-+1->Emitted(27, 13) Source(28, 9) + SourceIndex(0)
-+2 >Emitted(27, 20) Source(28, 16) + SourceIndex(0)
-+3 >Emitted(27, 28) Source(28, 24) + SourceIndex(0)
-+4 >Emitted(27, 29) Source(28, 25) + SourceIndex(0)
++1->Emitted(26, 13) Source(28, 9) + SourceIndex(0)
++2 >Emitted(26, 20) Source(28, 16) + SourceIndex(0)
++3 >Emitted(26, 28) Source(28, 24) + SourceIndex(0)
++4 >Emitted(26, 29) Source(28, 25) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^
@@ -724,8 +702,8 @@
 -2 >Emitted(26, 10) Source(29, 6) + SourceIndex(0)
 +2 >        
 +  >            }
-+1 >Emitted(28, 9) Source(28, 25) + SourceIndex(0)
-+2 >Emitted(28, 10) Source(29, 6) + SourceIndex(0)
++1 >Emitted(27, 9) Source(28, 25) + SourceIndex(0)
++2 >Emitted(27, 10) Source(29, 6) + SourceIndex(0)
  ---
  >>>        var b = foo2("Hello", "World", "!");
  1->^^^^^^^^
@@ -746,19 +724,19 @@
 -11>Emitted(27, 43) Source(31, 39) + SourceIndex(0)
 -12>Emitted(27, 44) Source(31, 40) + SourceIndex(0)
 -13>Emitted(27, 45) Source(31, 41) + SourceIndex(0)
-+1->Emitted(29, 9) Source(31, 5) + SourceIndex(0)
-+2 >Emitted(29, 13) Source(31, 9) + SourceIndex(0)
-+3 >Emitted(29, 14) Source(31, 10) + SourceIndex(0)
-+4 >Emitted(29, 17) Source(31, 13) + SourceIndex(0)
-+5 >Emitted(29, 21) Source(31, 17) + SourceIndex(0)
-+6 >Emitted(29, 22) Source(31, 18) + SourceIndex(0)
-+7 >Emitted(29, 29) Source(31, 25) + SourceIndex(0)
-+8 >Emitted(29, 31) Source(31, 27) + SourceIndex(0)
-+9 >Emitted(29, 38) Source(31, 34) + SourceIndex(0)
-+10>Emitted(29, 40) Source(31, 36) + SourceIndex(0)
-+11>Emitted(29, 43) Source(31, 39) + SourceIndex(0)
-+12>Emitted(29, 44) Source(31, 40) + SourceIndex(0)
-+13>Emitted(29, 45) Source(31, 41) + SourceIndex(0)
++1->Emitted(28, 9) Source(31, 5) + SourceIndex(0)
++2 >Emitted(28, 13) Source(31, 9) + SourceIndex(0)
++3 >Emitted(28, 14) Source(31, 10) + SourceIndex(0)
++4 >Emitted(28, 17) Source(31, 13) + SourceIndex(0)
++5 >Emitted(28, 21) Source(31, 17) + SourceIndex(0)
++6 >Emitted(28, 22) Source(31, 18) + SourceIndex(0)
++7 >Emitted(28, 29) Source(31, 25) + SourceIndex(0)
++8 >Emitted(28, 31) Source(31, 27) + SourceIndex(0)
++9 >Emitted(28, 38) Source(31, 34) + SourceIndex(0)
++10>Emitted(28, 40) Source(31, 36) + SourceIndex(0)
++11>Emitted(28, 43) Source(31, 39) + SourceIndex(0)
++12>Emitted(28, 44) Source(31, 40) + SourceIndex(0)
++13>Emitted(28, 45) Source(31, 41) + SourceIndex(0)
  ---
  >>>        for (var j = 0; j < b.length; j++) {
  1->^^^^^^^^
@@ -783,23 +761,23 @@
 -15>Emitted(28, 42) Source(32, 38) + SourceIndex(0)
 -16>Emitted(28, 44) Source(32, 40) + SourceIndex(0)
 -17>Emitted(28, 45) Source(32, 41) + SourceIndex(0)
-+1->Emitted(30, 9) Source(32, 5) + SourceIndex(0)
-+2 >Emitted(30, 14) Source(32, 10) + SourceIndex(0)
-+3 >Emitted(30, 18) Source(32, 14) + SourceIndex(0)
-+4 >Emitted(30, 19) Source(32, 15) + SourceIndex(0)
-+5 >Emitted(30, 22) Source(32, 18) + SourceIndex(0)
-+6 >Emitted(30, 23) Source(32, 19) + SourceIndex(0)
-+7 >Emitted(30, 25) Source(32, 21) + SourceIndex(0)
-+8 >Emitted(30, 26) Source(32, 22) + SourceIndex(0)
-+9 >Emitted(30, 29) Source(32, 25) + SourceIndex(0)
-+10>Emitted(30, 30) Source(32, 26) + SourceIndex(0)
-+11>Emitted(30, 31) Source(32, 27) + SourceIndex(0)
-+12>Emitted(30, 37) Source(32, 33) + SourceIndex(0)
-+13>Emitted(30, 39) Source(32, 35) + SourceIndex(0)
-+14>Emitted(30, 40) Source(32, 36) + SourceIndex(0)
-+15>Emitted(30, 42) Source(32, 38) + SourceIndex(0)
-+16>Emitted(30, 44) Source(32, 40) + SourceIndex(0)
-+17>Emitted(30, 45) Source(32, 41) + SourceIndex(0)
++1->Emitted(29, 9) Source(32, 5) + SourceIndex(0)
++2 >Emitted(29, 14) Source(32, 10) + SourceIndex(0)
++3 >Emitted(29, 18) Source(32, 14) + SourceIndex(0)
++4 >Emitted(29, 19) Source(32, 15) + SourceIndex(0)
++5 >Emitted(29, 22) Source(32, 18) + SourceIndex(0)
++6 >Emitted(29, 23) Source(32, 19) + SourceIndex(0)
++7 >Emitted(29, 25) Source(32, 21) + SourceIndex(0)
++8 >Emitted(29, 26) Source(32, 22) + SourceIndex(0)
++9 >Emitted(29, 29) Source(32, 25) + SourceIndex(0)
++10>Emitted(29, 30) Source(32, 26) + SourceIndex(0)
++11>Emitted(29, 31) Source(32, 27) + SourceIndex(0)
++12>Emitted(29, 37) Source(32, 33) + SourceIndex(0)
++13>Emitted(29, 39) Source(32, 35) + SourceIndex(0)
++14>Emitted(29, 40) Source(32, 36) + SourceIndex(0)
++15>Emitted(29, 42) Source(32, 38) + SourceIndex(0)
++16>Emitted(29, 44) Source(32, 40) + SourceIndex(0)
++17>Emitted(29, 45) Source(32, 41) + SourceIndex(0)
  ---
  >>>            b[j].greet();
  1 >^^^^^^^^^^^^
@@ -816,15 +794,15 @@
 -7 >Emitted(29, 23) Source(33, 19) + SourceIndex(0)
 -8 >Emitted(29, 25) Source(33, 21) + SourceIndex(0)
 -9 >Emitted(29, 26) Source(33, 22) + SourceIndex(0)
-+1 >Emitted(31, 13) Source(33, 9) + SourceIndex(0)
-+2 >Emitted(31, 14) Source(33, 10) + SourceIndex(0)
-+3 >Emitted(31, 15) Source(33, 11) + SourceIndex(0)
-+4 >Emitted(31, 16) Source(33, 12) + SourceIndex(0)
-+5 >Emitted(31, 17) Source(33, 13) + SourceIndex(0)
-+6 >Emitted(31, 18) Source(33, 14) + SourceIndex(0)
-+7 >Emitted(31, 23) Source(33, 19) + SourceIndex(0)
-+8 >Emitted(31, 25) Source(33, 21) + SourceIndex(0)
-+9 >Emitted(31, 26) Source(33, 22) + SourceIndex(0)
++1 >Emitted(30, 13) Source(33, 9) + SourceIndex(0)
++2 >Emitted(30, 14) Source(33, 10) + SourceIndex(0)
++3 >Emitted(30, 15) Source(33, 11) + SourceIndex(0)
++4 >Emitted(30, 16) Source(33, 12) + SourceIndex(0)
++5 >Emitted(30, 17) Source(33, 13) + SourceIndex(0)
++6 >Emitted(30, 18) Source(33, 14) + SourceIndex(0)
++7 >Emitted(30, 23) Source(33, 19) + SourceIndex(0)
++8 >Emitted(30, 25) Source(33, 21) + SourceIndex(0)
++9 >Emitted(30, 26) Source(33, 22) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^
@@ -834,8 +812,8 @@
  2 >        }
 -1 >Emitted(30, 9) Source(34, 5) + SourceIndex(0)
 -2 >Emitted(30, 10) Source(34, 6) + SourceIndex(0)
-+1 >Emitted(32, 9) Source(34, 5) + SourceIndex(0)
-+2 >Emitted(32, 10) Source(34, 6) + SourceIndex(0)
++1 >Emitted(31, 9) Source(34, 5) + SourceIndex(0)
++2 >Emitted(31, 10) Source(34, 6) + SourceIndex(0)
  ---
  >>>    })(Bar = Foo.Bar || (Foo.Bar = {}));
  1->^^^^
@@ -887,17 +865,17 @@
 -7 >Emitted(31, 26) Source(1, 12) + SourceIndex(0)
 -8 >Emitted(31, 33) Source(1, 15) + SourceIndex(0)
 -9 >Emitted(31, 41) Source(35, 2) + SourceIndex(0)
-+1->Emitted(33, 5) Source(34, 6) + SourceIndex(0)
-+2 >Emitted(33, 6) Source(35, 2) + SourceIndex(0)
-+3 >Emitted(33, 8) Source(1, 12) + SourceIndex(0)
-+4 >Emitted(33, 11) Source(1, 15) + SourceIndex(0)
-+5 >Emitted(33, 14) Source(1, 12) + SourceIndex(0)
-+6 >Emitted(33, 18) Source(1, 12) + SourceIndex(0)
-+7 >Emitted(33, 21) Source(1, 15) + SourceIndex(0)
-+8 >Emitted(33, 26) Source(1, 12) + SourceIndex(0)
-+9 >Emitted(33, 30) Source(1, 12) + SourceIndex(0)
-+10>Emitted(33, 33) Source(1, 15) + SourceIndex(0)
-+11>Emitted(33, 41) Source(35, 2) + SourceIndex(0)
++1->Emitted(32, 5) Source(34, 6) + SourceIndex(0)
++2 >Emitted(32, 6) Source(35, 2) + SourceIndex(0)
++3 >Emitted(32, 8) Source(1, 12) + SourceIndex(0)
++4 >Emitted(32, 11) Source(1, 15) + SourceIndex(0)
++5 >Emitted(32, 14) Source(1, 12) + SourceIndex(0)
++6 >Emitted(32, 18) Source(1, 12) + SourceIndex(0)
++7 >Emitted(32, 21) Source(1, 15) + SourceIndex(0)
++8 >Emitted(32, 26) Source(1, 12) + SourceIndex(0)
++9 >Emitted(32, 30) Source(1, 12) + SourceIndex(0)
++10>Emitted(32, 33) Source(1, 15) + SourceIndex(0)
++11>Emitted(32, 41) Source(35, 2) + SourceIndex(0)
  ---
  >>>})(Foo || (Foo = {}));
  1 >
@@ -943,13 +921,13 @@
 -5 >Emitted(32, 12) Source(1, 8) + SourceIndex(0)
 -6 >Emitted(32, 15) Source(1, 11) + SourceIndex(0)
 -7 >Emitted(32, 23) Source(35, 2) + SourceIndex(0)
-+1 >Emitted(34, 1) Source(34, 6) + SourceIndex(0)
-+2 >Emitted(34, 2) Source(35, 1) + SourceIndex(0)
-+3 >Emitted(34, 2) Source(1, 1) + SourceIndex(0)
-+4 >Emitted(34, 4) Source(1, 8) + SourceIndex(0)
-+5 >Emitted(34, 7) Source(1, 11) + SourceIndex(0)
-+6 >Emitted(34, 12) Source(1, 8) + SourceIndex(0)
-+7 >Emitted(34, 15) Source(1, 11) + SourceIndex(0)
-+8 >Emitted(34, 23) Source(35, 2) + SourceIndex(0)
++1 >Emitted(33, 1) Source(34, 6) + SourceIndex(0)
++2 >Emitted(33, 2) Source(35, 1) + SourceIndex(0)
++3 >Emitted(33, 2) Source(1, 1) + SourceIndex(0)
++4 >Emitted(33, 4) Source(1, 8) + SourceIndex(0)
++5 >Emitted(33, 7) Source(1, 11) + SourceIndex(0)
++6 >Emitted(33, 12) Source(1, 8) + SourceIndex(0)
++7 >Emitted(33, 15) Source(1, 11) + SourceIndex(0)
++8 >Emitted(33, 23) Source(35, 2) + SourceIndex(0)
  ---
  >>>//# sourceMappingURL=sourceMapSample.js.map
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js
index 0c731f57ba..97302029b6 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js
@@ -43,7 +43,6 @@ var Foo;
 (function (Foo) {
     let Bar;
     (function (Bar) {
-        "use strict";
         "use strict";
         class Greeter {
             greeting;
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.diff b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.diff
index 948f4d26fa..69132f0fb4 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.diff
@@ -8,7 +8,6 @@
 +    let Bar;
      (function (Bar) {
          "use strict";
-+        "use strict";
          class Greeter {
 +            greeting;
              constructor(greeting) {
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map
index d164126e37..049f95c61c 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map
@@ -1,3 +1,3 @@
 //// [sourceMapValidationClasses.js.map]
-{"version":3,"file":"sourceMapValidationClasses.js","sourceRoot":"","sources":["sourceMapValidationClasses.ts"],"names":[],"mappings":"AAAA,IAAO,GAmCN;AAnCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAmCV;IAnCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAAb,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAW;YACpC,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAa,CAAC,mBAA6B,EAAE;YAC5E,IAAI,QAAQ,GAAc,EAAE,CAAC,CAAC,0BAA0B;YACxD,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,qCAAqC;QACrC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAnCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAmCb;AADI,CACL,AAnCA,EAAO,GAAG,KAAH,GAAG,QAmCT"}
-//// https://sokra.github.io/source-map-visualization#base64,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,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,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
+{"version":3,"file":"sourceMapValidationClasses.js","sourceRoot":"","sources":["sourceMapValidationClasses.ts"],"names":[],"mappings":"AAAA,IAAO,GAmCN;AAnCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAmCV;IAnCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAW;YACpC,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAa,CAAC,mBAA6B,EAAE;YAC5E,IAAI,QAAQ,GAAc,EAAE,CAAC,CAAC,0BAA0B;YACxD,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,qCAAqC;QACrC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAnCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAmCb;AADI,CACL,AAnCA,EAAO,GAAG,KAAH,GAAG,QAmCT"}
+//// https://sokra.github.io/source-map-visualization#base64,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,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,bW9kdWxlIEZvby5CYXIgewogICAgInVzZSBzdHJpY3QiOwoKICAgIGNsYXNzIEdyZWV0ZXIgewogICAgICAgIGNvbnN0cnVjdG9yKHB1YmxpYyBncmVldGluZzogc3RyaW5nKSB7CiAgICAgICAgfQoKICAgICAgICBncmVldCgpIHsKICAgICAgICAgICAgcmV0dXJuICI8aDE+IiArIHRoaXMuZ3JlZXRpbmcgKyAiPC9oMT4iOwogICAgICAgIH0KICAgIH0KCgogICAgZnVuY3Rpb24gZm9vKGdyZWV0aW5nOiBzdHJpbmcpOiBHcmVldGVyIHsKICAgICAgICByZXR1cm4gbmV3IEdyZWV0ZXIoZ3JlZXRpbmcpOwogICAgfQoKICAgIHZhciBncmVldGVyID0gbmV3IEdyZWV0ZXIoIkhlbGxvLCB3b3JsZCEiKTsKICAgIHZhciBzdHIgPSBncmVldGVyLmdyZWV0KCk7CgogICAgZnVuY3Rpb24gZm9vMihncmVldGluZzogc3RyaW5nLCAuLi5yZXN0R3JlZXRpbmdzIC8qIG1vcmUgZ3JlZXRpbmcgKi86IHN0cmluZ1tdKSB7CiAgICAgICAgdmFyIGdyZWV0ZXJzOiBHcmVldGVyW10gPSBbXTsgLyogaW5saW5lIGJsb2NrIGNvbW1lbnQgKi8KICAgICAgICBncmVldGVyc1swXSA9IG5ldyBHcmVldGVyKGdyZWV0aW5nKTsKICAgICAgICBmb3IgKHZhciBpID0gMDsgaSA8IHJlc3RHcmVldGluZ3MubGVuZ3RoOyBpKyspIHsKICAgICAgICAgICAgZ3JlZXRlcnMucHVzaChuZXcgR3JlZXRlcihyZXN0R3JlZXRpbmdzW2ldKSk7CiAgICAgICAgfQoKICAgICAgICByZXR1cm4gZ3JlZXRlcnM7CiAgICB9CgogICAgdmFyIGIgPSBmb28yKCJIZWxsbyIsICJXb3JsZCIsICIhIik7CiAgICAvLyBUaGlzIGlzIHNpbXBsZSBzaWdubGUgbGluZSBjb21tZW50CiAgICBmb3IgKHZhciBqID0gMDsgaiA8IGIubGVuZ3RoOyBqKyspIHsKICAgICAgICBiW2pdLmdyZWV0KCk7CiAgICB9Cn0=
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map.diff b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map.diff
index 76f30ba0a3..e0fc8d04ed 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map.diff
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.js.map.diff
@@ -4,5 +4,5 @@
  //// [sourceMapValidationClasses.js.map]
 -{"version":3,"file":"sourceMapValidationClasses.js","sourceRoot":"","sources":["sourceMapValidationClasses.ts"],"names":[],"mappings":"AAAA,IAAO,GAAG,CAmCT;AAnCD,WAAO,GAAG;IAAC,IAAA,GAAG,CAmCb;IAnCU,WAAA,GAAG;QACV,YAAY,CAAC;QAEb,MAAM,OAAO;YACT,YAAmB,QAAgB;gBAAhB,aAAQ,GAAR,QAAQ,CAAQ;YACnC,CAAC;YAED,KAAK;gBACD,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAC5C,CAAC;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB;YACzB,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QACjC,CAAC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,cAAc,mBAA6B;YAC1E,IAAI,QAAQ,GAAc,EAAE,CAAC,CAAC,0BAA0B;YACxD,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QACpB,CAAC;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,qCAAqC;QACrC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IACL,CAAC,EAnCU,GAAG,GAAH,OAAG,KAAH,OAAG,QAmCb;AAAD,CAAC,EAnCM,GAAG,KAAH,GAAG,QAmCT"}
 -//// https://sokra.github.io/source-map-visualization#base64,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,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,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
-+{"version":3,"file":"sourceMapValidationClasses.js","sourceRoot":"","sources":["sourceMapValidationClasses.ts"],"names":[],"mappings":"AAAA,IAAO,GAmCN;AAnCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAmCV;IAnCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAAb,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAW;YACpC,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAa,CAAC,mBAA6B,EAAE;YAC5E,IAAI,QAAQ,GAAc,EAAE,CAAC,CAAC,0BAA0B;YACxD,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,qCAAqC;QACrC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAnCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAmCb;AADI,CACL,AAnCA,EAAO,GAAG,KAAH,GAAG,QAmCT"}
-+//// https://sokra.github.io/source-map-visualization#base64,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,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,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
\ No newline at end of file
++{"version":3,"file":"sourceMapValidationClasses.js","sourceRoot":"","sources":["sourceMapValidationClasses.ts"],"names":[],"mappings":"AAAA,IAAO,GAmCN;AAnCD,WAAO,GAAG,EAAV;IAAW,IAAA,GAmCV;IAnCU,WAAA,GAAG,EAAC;QACX,YAAY,CAAC;QAEb,MAAM,OAAO;YACU,QAAQ;YAA3B,YAAmB,QAAgB,EAAE;gCAAlB,QAAQ;YAAW,CACrC;YAED,KAAK,GAAG;gBACJ,OAAO,MAAM,GAAG,IAAI,CAAC,QAAQ,GAAG,OAAO,CAAC;YAAA,CAC3C;SACJ;QAGD,SAAS,GAAG,CAAC,QAAgB,EAAW;YACpC,OAAO,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;QAAA,CAChC;QAED,IAAI,OAAO,GAAG,IAAI,OAAO,CAAC,eAAe,CAAC,CAAC;QAC3C,IAAI,GAAG,GAAG,OAAO,CAAC,KAAK,EAAE,CAAC;QAE1B,SAAS,IAAI,CAAC,QAAgB,EAAE,GAAG,aAAa,CAAC,mBAA6B,EAAE;YAC5E,IAAI,QAAQ,GAAc,EAAE,CAAC,CAAC,0BAA0B;YACxD,QAAQ,CAAC,CAAC,CAAC,GAAG,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC;YACpC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,aAAa,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;gBAC5C,QAAQ,CAAC,IAAI,CAAC,IAAI,OAAO,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,QAAQ,CAAC;QAAA,CACnB;QAED,IAAI,CAAC,GAAG,IAAI,CAAC,OAAO,EAAE,OAAO,EAAE,GAAG,CAAC,CAAC;QACpC,qCAAqC;QACrC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YAChC,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,CAAC;QACjB,CAAC;IAAA,CACJ,EAnCU,GAAG,GAAH,IAAA,GAAG,KAAH,IAAA,GAAG,QAmCb;AADI,CACL,AAnCA,EAAO,GAAG,KAAH,GAAG,QAmCT"}
++//// https://sokra.github.io/source-map-visualization#base64,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,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,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
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt
index 7c01232353..8109842fd9 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt
@@ -135,7 +135,7 @@ sourceFile:sourceMapValidationClasses.ts
 1->^^^^^^^^
 2 >        ^^^^^^^^^^^^
 3 >                    ^
-4 >                     ^->
+4 >                     ^^^->
 1->{
   >    
 2 >        "use strict"
@@ -144,18 +144,6 @@ sourceFile:sourceMapValidationClasses.ts
 2 >Emitted(5, 21) Source(2, 17) + SourceIndex(0)
 3 >Emitted(5, 22) Source(2, 18) + SourceIndex(0)
 ---
->>>        "use strict";
-1->^^^^^^^^
-2 >        ^^^^^^^^^^^^
-3 >                    ^
-4 >                     ^^^->
-1->
-2 >        "use strict"
-3 >                    ;
-1->Emitted(6, 9) Source(2, 5) + SourceIndex(0)
-2 >Emitted(6, 21) Source(2, 17) + SourceIndex(0)
-3 >Emitted(6, 22) Source(2, 18) + SourceIndex(0)
----
 >>>        class Greeter {
 1->^^^^^^^^
 2 >        ^^^^^^
@@ -166,9 +154,9 @@ sourceFile:sourceMapValidationClasses.ts
   >    
 2 >        class 
 3 >              Greeter
-1->Emitted(7, 9) Source(4, 5) + SourceIndex(0)
-2 >Emitted(7, 15) Source(4, 11) + SourceIndex(0)
-3 >Emitted(7, 22) Source(4, 18) + SourceIndex(0)
+1->Emitted(6, 9) Source(4, 5) + SourceIndex(0)
+2 >Emitted(6, 15) Source(4, 11) + SourceIndex(0)
+3 >Emitted(6, 22) Source(4, 18) + SourceIndex(0)
 ---
 >>>            greeting;
 1->^^^^^^^^^^^^
@@ -177,8 +165,8 @@ sourceFile:sourceMapValidationClasses.ts
 1-> {
   >        constructor(public 
 2 >            greeting
-1->Emitted(8, 13) Source(5, 28) + SourceIndex(0)
-2 >Emitted(8, 21) Source(5, 36) + SourceIndex(0)
+1->Emitted(7, 13) Source(5, 28) + SourceIndex(0)
+2 >Emitted(7, 21) Source(5, 36) + SourceIndex(0)
 ---
 >>>            constructor(greeting) {
 1->^^^^^^^^^^^^
@@ -190,18 +178,18 @@ sourceFile:sourceMapValidationClasses.ts
 2 >            constructor(public 
 3 >                        greeting: string
 4 >                                ) 
-1->Emitted(9, 13) Source(5, 9) + SourceIndex(0)
-2 >Emitted(9, 25) Source(5, 28) + SourceIndex(0)
-3 >Emitted(9, 33) Source(5, 44) + SourceIndex(0)
-4 >Emitted(9, 35) Source(5, 46) + SourceIndex(0)
+1->Emitted(8, 13) Source(5, 9) + SourceIndex(0)
+2 >Emitted(8, 25) Source(5, 28) + SourceIndex(0)
+3 >Emitted(8, 33) Source(5, 44) + SourceIndex(0)
+4 >Emitted(8, 35) Source(5, 46) + SourceIndex(0)
 ---
 >>>                this.greeting = greeting;
 1->^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 2 >                                ^^^^^^^^
 1->
 2 >                                greeting
-1->Emitted(10, 33) Source(5, 28) + SourceIndex(0)
-2 >Emitted(10, 41) Source(5, 36) + SourceIndex(0)
+1->Emitted(9, 33) Source(5, 28) + SourceIndex(0)
+2 >Emitted(9, 41) Source(5, 36) + SourceIndex(0)
 ---
 >>>            }
 1 >^^^^^^^^^^^^
@@ -210,8 +198,8 @@ sourceFile:sourceMapValidationClasses.ts
 1 >: string) {
 2 >            
   >                    }
-1 >Emitted(11, 13) Source(5, 47) + SourceIndex(0)
-2 >Emitted(11, 14) Source(6, 10) + SourceIndex(0)
+1 >Emitted(10, 13) Source(5, 47) + SourceIndex(0)
+2 >Emitted(10, 14) Source(6, 10) + SourceIndex(0)
 ---
 >>>            greet() {
 1->^^^^^^^^^^^^
@@ -223,9 +211,9 @@ sourceFile:sourceMapValidationClasses.ts
   >        
 2 >            greet
 3 >                 () 
-1->Emitted(12, 13) Source(8, 9) + SourceIndex(0)
-2 >Emitted(12, 18) Source(8, 14) + SourceIndex(0)
-3 >Emitted(12, 21) Source(8, 17) + SourceIndex(0)
+1->Emitted(11, 13) Source(8, 9) + SourceIndex(0)
+2 >Emitted(11, 18) Source(8, 14) + SourceIndex(0)
+3 >Emitted(11, 21) Source(8, 17) + SourceIndex(0)
 ---
 >>>                return "<h1>" + this.greeting + "</h1>";
 1->^^^^^^^^^^^^^^^^
@@ -249,16 +237,16 @@ sourceFile:sourceMapValidationClasses.ts
 8 >                                              + 
 9 >                                                "</h1>"
 10>                                                       ;
-1->Emitted(13, 17) Source(9, 13) + SourceIndex(0)
-2 >Emitted(13, 24) Source(9, 20) + SourceIndex(0)
-3 >Emitted(13, 30) Source(9, 26) + SourceIndex(0)
-4 >Emitted(13, 33) Source(9, 29) + SourceIndex(0)
-5 >Emitted(13, 37) Source(9, 33) + SourceIndex(0)
-6 >Emitted(13, 38) Source(9, 34) + SourceIndex(0)
-7 >Emitted(13, 46) Source(9, 42) + SourceIndex(0)
-8 >Emitted(13, 49) Source(9, 45) + SourceIndex(0)
-9 >Emitted(13, 56) Source(9, 52) + SourceIndex(0)
-10>Emitted(13, 57) Source(9, 53) + SourceIndex(0)
+1->Emitted(12, 17) Source(9, 13) + SourceIndex(0)
+2 >Emitted(12, 24) Source(9, 20) + SourceIndex(0)
+3 >Emitted(12, 30) Source(9, 26) + SourceIndex(0)
+4 >Emitted(12, 33) Source(9, 29) + SourceIndex(0)
+5 >Emitted(12, 37) Source(9, 33) + SourceIndex(0)
+6 >Emitted(12, 38) Source(9, 34) + SourceIndex(0)
+7 >Emitted(12, 46) Source(9, 42) + SourceIndex(0)
+8 >Emitted(12, 49) Source(9, 45) + SourceIndex(0)
+9 >Emitted(12, 56) Source(9, 52) + SourceIndex(0)
+10>Emitted(12, 57) Source(9, 53) + SourceIndex(0)
 ---
 >>>            }
 1 >^^^^^^^^^^^^
@@ -266,15 +254,15 @@ sourceFile:sourceMapValidationClasses.ts
 1 >
 2 >            
   >                    }
-1 >Emitted(14, 13) Source(9, 53) + SourceIndex(0)
-2 >Emitted(14, 14) Source(10, 10) + SourceIndex(0)
+1 >Emitted(13, 13) Source(9, 53) + SourceIndex(0)
+2 >Emitted(13, 14) Source(10, 10) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^^
 2 >         ^^^^^^^^^^^^^^^^^^^^^^^^->
 1 >
   >    }
-1 >Emitted(15, 10) Source(11, 6) + SourceIndex(0)
+1 >Emitted(14, 10) Source(11, 6) + SourceIndex(0)
 ---
 >>>        function foo(greeting) {
 1->^^^^^^^^
@@ -293,12 +281,12 @@ sourceFile:sourceMapValidationClasses.ts
 4 >                    (
 5 >                     greeting: string
 6 >                             ): Greeter 
-1->Emitted(16, 9) Source(14, 5) + SourceIndex(0)
-2 >Emitted(16, 18) Source(14, 14) + SourceIndex(0)
-3 >Emitted(16, 21) Source(14, 17) + SourceIndex(0)
-4 >Emitted(16, 22) Source(14, 18) + SourceIndex(0)
-5 >Emitted(16, 30) Source(14, 34) + SourceIndex(0)
-6 >Emitted(16, 32) Source(14, 45) + SourceIndex(0)
+1->Emitted(15, 9) Source(14, 5) + SourceIndex(0)
+2 >Emitted(15, 18) Source(14, 14) + SourceIndex(0)
+3 >Emitted(15, 21) Source(14, 17) + SourceIndex(0)
+4 >Emitted(15, 22) Source(14, 18) + SourceIndex(0)
+5 >Emitted(15, 30) Source(14, 34) + SourceIndex(0)
+6 >Emitted(15, 32) Source(14, 45) + SourceIndex(0)
 ---
 >>>            return new Greeter(greeting);
 1->^^^^^^^^^^^^
@@ -318,14 +306,14 @@ sourceFile:sourceMapValidationClasses.ts
 6 >                               greeting
 7 >                                       )
 8 >                                        ;
-1->Emitted(17, 13) Source(15, 9) + SourceIndex(0)
-2 >Emitted(17, 20) Source(15, 16) + SourceIndex(0)
-3 >Emitted(17, 24) Source(15, 20) + SourceIndex(0)
-4 >Emitted(17, 31) Source(15, 27) + SourceIndex(0)
-5 >Emitted(17, 32) Source(15, 28) + SourceIndex(0)
-6 >Emitted(17, 40) Source(15, 36) + SourceIndex(0)
-7 >Emitted(17, 41) Source(15, 37) + SourceIndex(0)
-8 >Emitted(17, 42) Source(15, 38) + SourceIndex(0)
+1->Emitted(16, 13) Source(15, 9) + SourceIndex(0)
+2 >Emitted(16, 20) Source(15, 16) + SourceIndex(0)
+3 >Emitted(16, 24) Source(15, 20) + SourceIndex(0)
+4 >Emitted(16, 31) Source(15, 27) + SourceIndex(0)
+5 >Emitted(16, 32) Source(15, 28) + SourceIndex(0)
+6 >Emitted(16, 40) Source(15, 36) + SourceIndex(0)
+7 >Emitted(16, 41) Source(15, 37) + SourceIndex(0)
+8 >Emitted(16, 42) Source(15, 38) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^
@@ -334,8 +322,8 @@ sourceFile:sourceMapValidationClasses.ts
 1 >
 2 >        
   >            }
-1 >Emitted(18, 9) Source(15, 38) + SourceIndex(0)
-2 >Emitted(18, 10) Source(16, 6) + SourceIndex(0)
+1 >Emitted(17, 9) Source(15, 38) + SourceIndex(0)
+2 >Emitted(17, 10) Source(16, 6) + SourceIndex(0)
 ---
 >>>        var greeter = new Greeter("Hello, world!");
 1->^^^^^^^^
@@ -360,16 +348,16 @@ sourceFile:sourceMapValidationClasses.ts
 8 >                                  "Hello, world!"
 9 >                                                 )
 10>                                                  ;
-1->Emitted(19, 9) Source(18, 5) + SourceIndex(0)
-2 >Emitted(19, 13) Source(18, 9) + SourceIndex(0)
-3 >Emitted(19, 20) Source(18, 16) + SourceIndex(0)
-4 >Emitted(19, 23) Source(18, 19) + SourceIndex(0)
-5 >Emitted(19, 27) Source(18, 23) + SourceIndex(0)
-6 >Emitted(19, 34) Source(18, 30) + SourceIndex(0)
-7 >Emitted(19, 35) Source(18, 31) + SourceIndex(0)
-8 >Emitted(19, 50) Source(18, 46) + SourceIndex(0)
-9 >Emitted(19, 51) Source(18, 47) + SourceIndex(0)
-10>Emitted(19, 52) Source(18, 48) + SourceIndex(0)
+1->Emitted(18, 9) Source(18, 5) + SourceIndex(0)
+2 >Emitted(18, 13) Source(18, 9) + SourceIndex(0)
+3 >Emitted(18, 20) Source(18, 16) + SourceIndex(0)
+4 >Emitted(18, 23) Source(18, 19) + SourceIndex(0)
+5 >Emitted(18, 27) Source(18, 23) + SourceIndex(0)
+6 >Emitted(18, 34) Source(18, 30) + SourceIndex(0)
+7 >Emitted(18, 35) Source(18, 31) + SourceIndex(0)
+8 >Emitted(18, 50) Source(18, 46) + SourceIndex(0)
+9 >Emitted(18, 51) Source(18, 47) + SourceIndex(0)
+10>Emitted(18, 52) Source(18, 48) + SourceIndex(0)
 ---
 >>>        var str = greeter.greet();
 1 >^^^^^^^^
@@ -392,15 +380,15 @@ sourceFile:sourceMapValidationClasses.ts
 7 >                          greet
 8 >                               ()
 9 >                                 ;
-1 >Emitted(20, 9) Source(19, 5) + SourceIndex(0)
-2 >Emitted(20, 13) Source(19, 9) + SourceIndex(0)
-3 >Emitted(20, 16) Source(19, 12) + SourceIndex(0)
-4 >Emitted(20, 19) Source(19, 15) + SourceIndex(0)
-5 >Emitted(20, 26) Source(19, 22) + SourceIndex(0)
-6 >Emitted(20, 27) Source(19, 23) + SourceIndex(0)
-7 >Emitted(20, 32) Source(19, 28) + SourceIndex(0)
-8 >Emitted(20, 34) Source(19, 30) + SourceIndex(0)
-9 >Emitted(20, 35) Source(19, 31) + SourceIndex(0)
+1 >Emitted(19, 9) Source(19, 5) + SourceIndex(0)
+2 >Emitted(19, 13) Source(19, 9) + SourceIndex(0)
+3 >Emitted(19, 16) Source(19, 12) + SourceIndex(0)
+4 >Emitted(19, 19) Source(19, 15) + SourceIndex(0)
+5 >Emitted(19, 26) Source(19, 22) + SourceIndex(0)
+6 >Emitted(19, 27) Source(19, 23) + SourceIndex(0)
+7 >Emitted(19, 32) Source(19, 28) + SourceIndex(0)
+8 >Emitted(19, 34) Source(19, 30) + SourceIndex(0)
+9 >Emitted(19, 35) Source(19, 31) + SourceIndex(0)
 ---
 >>>        function foo2(greeting, ...restGreetings /* more greeting */) {
 1->^^^^^^^^
@@ -427,17 +415,17 @@ sourceFile:sourceMapValidationClasses.ts
 9 >                                                 
 10>                                                 /* more greeting */: string[]
 11>                                                                    ) 
-1->Emitted(21, 9) Source(21, 5) + SourceIndex(0)
-2 >Emitted(21, 18) Source(21, 14) + SourceIndex(0)
-3 >Emitted(21, 22) Source(21, 18) + SourceIndex(0)
-4 >Emitted(21, 23) Source(21, 19) + SourceIndex(0)
-5 >Emitted(21, 31) Source(21, 35) + SourceIndex(0)
-6 >Emitted(21, 33) Source(21, 37) + SourceIndex(0)
-7 >Emitted(21, 36) Source(21, 40) + SourceIndex(0)
-8 >Emitted(21, 49) Source(21, 53) + SourceIndex(0)
-9 >Emitted(21, 50) Source(21, 54) + SourceIndex(0)
-10>Emitted(21, 69) Source(21, 83) + SourceIndex(0)
-11>Emitted(21, 71) Source(21, 85) + SourceIndex(0)
+1->Emitted(20, 9) Source(21, 5) + SourceIndex(0)
+2 >Emitted(20, 18) Source(21, 14) + SourceIndex(0)
+3 >Emitted(20, 22) Source(21, 18) + SourceIndex(0)
+4 >Emitted(20, 23) Source(21, 19) + SourceIndex(0)
+5 >Emitted(20, 31) Source(21, 35) + SourceIndex(0)
+6 >Emitted(20, 33) Source(21, 37) + SourceIndex(0)
+7 >Emitted(20, 36) Source(21, 40) + SourceIndex(0)
+8 >Emitted(20, 49) Source(21, 53) + SourceIndex(0)
+9 >Emitted(20, 50) Source(21, 54) + SourceIndex(0)
+10>Emitted(20, 69) Source(21, 83) + SourceIndex(0)
+11>Emitted(20, 71) Source(21, 85) + SourceIndex(0)
 ---
 >>>            var greeters = []; /* inline block comment */
 1 >^^^^^^^^^^^^
@@ -457,14 +445,14 @@ sourceFile:sourceMapValidationClasses.ts
 6 >                             ;
 7 >                               
 8 >                               /* inline block comment */
-1 >Emitted(22, 13) Source(22, 9) + SourceIndex(0)
-2 >Emitted(22, 17) Source(22, 13) + SourceIndex(0)
-3 >Emitted(22, 25) Source(22, 21) + SourceIndex(0)
-4 >Emitted(22, 28) Source(22, 35) + SourceIndex(0)
-5 >Emitted(22, 30) Source(22, 37) + SourceIndex(0)
-6 >Emitted(22, 31) Source(22, 38) + SourceIndex(0)
-7 >Emitted(22, 32) Source(22, 39) + SourceIndex(0)
-8 >Emitted(22, 58) Source(22, 65) + SourceIndex(0)
+1 >Emitted(21, 13) Source(22, 9) + SourceIndex(0)
+2 >Emitted(21, 17) Source(22, 13) + SourceIndex(0)
+3 >Emitted(21, 25) Source(22, 21) + SourceIndex(0)
+4 >Emitted(21, 28) Source(22, 35) + SourceIndex(0)
+5 >Emitted(21, 30) Source(22, 37) + SourceIndex(0)
+6 >Emitted(21, 31) Source(22, 38) + SourceIndex(0)
+7 >Emitted(21, 32) Source(22, 39) + SourceIndex(0)
+8 >Emitted(21, 58) Source(22, 65) + SourceIndex(0)
 ---
 >>>            greeters[0] = new Greeter(greeting);
 1 >^^^^^^^^^^^^
@@ -493,18 +481,18 @@ sourceFile:sourceMapValidationClasses.ts
 10>                                      greeting
 11>                                              )
 12>                                               ;
-1 >Emitted(23, 13) Source(23, 9) + SourceIndex(0)
-2 >Emitted(23, 21) Source(23, 17) + SourceIndex(0)
-3 >Emitted(23, 22) Source(23, 18) + SourceIndex(0)
-4 >Emitted(23, 23) Source(23, 19) + SourceIndex(0)
-5 >Emitted(23, 24) Source(23, 20) + SourceIndex(0)
-6 >Emitted(23, 27) Source(23, 23) + SourceIndex(0)
-7 >Emitted(23, 31) Source(23, 27) + SourceIndex(0)
-8 >Emitted(23, 38) Source(23, 34) + SourceIndex(0)
-9 >Emitted(23, 39) Source(23, 35) + SourceIndex(0)
-10>Emitted(23, 47) Source(23, 43) + SourceIndex(0)
-11>Emitted(23, 48) Source(23, 44) + SourceIndex(0)
-12>Emitted(23, 49) Source(23, 45) + SourceIndex(0)
+1 >Emitted(22, 13) Source(23, 9) + SourceIndex(0)
+2 >Emitted(22, 21) Source(23, 17) + SourceIndex(0)
+3 >Emitted(22, 22) Source(23, 18) + SourceIndex(0)
+4 >Emitted(22, 23) Source(23, 19) + SourceIndex(0)
+5 >Emitted(22, 24) Source(23, 20) + SourceIndex(0)
+6 >Emitted(22, 27) Source(23, 23) + SourceIndex(0)
+7 >Emitted(22, 31) Source(23, 27) + SourceIndex(0)
+8 >Emitted(22, 38) Source(23, 34) + SourceIndex(0)
+9 >Emitted(22, 39) Source(23, 35) + SourceIndex(0)
+10>Emitted(22, 47) Source(23, 43) + SourceIndex(0)
+11>Emitted(22, 48) Source(23, 44) + SourceIndex(0)
+12>Emitted(22, 49) Source(23, 45) + SourceIndex(0)
 ---
 >>>            for (var i = 0; i < restGreetings.length; i++) {
 1->^^^^^^^^^^^^
@@ -543,23 +531,23 @@ sourceFile:sourceMapValidationClasses.ts
 15>                                                       ++
 16>                                                         ) 
 17>                                                           {
-1->Emitted(24, 13) Source(24, 9) + SourceIndex(0)
-2 >Emitted(24, 18) Source(24, 14) + SourceIndex(0)
-3 >Emitted(24, 22) Source(24, 18) + SourceIndex(0)
-4 >Emitted(24, 23) Source(24, 19) + SourceIndex(0)
-5 >Emitted(24, 26) Source(24, 22) + SourceIndex(0)
-6 >Emitted(24, 27) Source(24, 23) + SourceIndex(0)
-7 >Emitted(24, 29) Source(24, 25) + SourceIndex(0)
-8 >Emitted(24, 30) Source(24, 26) + SourceIndex(0)
-9 >Emitted(24, 33) Source(24, 29) + SourceIndex(0)
-10>Emitted(24, 46) Source(24, 42) + SourceIndex(0)
-11>Emitted(24, 47) Source(24, 43) + SourceIndex(0)
-12>Emitted(24, 53) Source(24, 49) + SourceIndex(0)
-13>Emitted(24, 55) Source(24, 51) + SourceIndex(0)
-14>Emitted(24, 56) Source(24, 52) + SourceIndex(0)
-15>Emitted(24, 58) Source(24, 54) + SourceIndex(0)
-16>Emitted(24, 60) Source(24, 56) + SourceIndex(0)
-17>Emitted(24, 61) Source(24, 57) + SourceIndex(0)
+1->Emitted(23, 13) Source(24, 9) + SourceIndex(0)
+2 >Emitted(23, 18) Source(24, 14) + SourceIndex(0)
+3 >Emitted(23, 22) Source(24, 18) + SourceIndex(0)
+4 >Emitted(23, 23) Source(24, 19) + SourceIndex(0)
+5 >Emitted(23, 26) Source(24, 22) + SourceIndex(0)
+6 >Emitted(23, 27) Source(24, 23) + SourceIndex(0)
+7 >Emitted(23, 29) Source(24, 25) + SourceIndex(0)
+8 >Emitted(23, 30) Source(24, 26) + SourceIndex(0)
+9 >Emitted(23, 33) Source(24, 29) + SourceIndex(0)
+10>Emitted(23, 46) Source(24, 42) + SourceIndex(0)
+11>Emitted(23, 47) Source(24, 43) + SourceIndex(0)
+12>Emitted(23, 53) Source(24, 49) + SourceIndex(0)
+13>Emitted(23, 55) Source(24, 51) + SourceIndex(0)
+14>Emitted(23, 56) Source(24, 52) + SourceIndex(0)
+15>Emitted(23, 58) Source(24, 54) + SourceIndex(0)
+16>Emitted(23, 60) Source(24, 56) + SourceIndex(0)
+17>Emitted(23, 61) Source(24, 57) + SourceIndex(0)
 ---
 >>>                greeters.push(new Greeter(restGreetings[i]));
 1->^^^^^^^^^^^^^^^^
@@ -593,21 +581,21 @@ sourceFile:sourceMapValidationClasses.ts
 13>                                                          )
 14>                                                           )
 15>                                                            ;
-1->Emitted(25, 17) Source(25, 13) + SourceIndex(0)
-2 >Emitted(25, 25) Source(25, 21) + SourceIndex(0)
-3 >Emitted(25, 26) Source(25, 22) + SourceIndex(0)
-4 >Emitted(25, 30) Source(25, 26) + SourceIndex(0)
-5 >Emitted(25, 31) Source(25, 27) + SourceIndex(0)
-6 >Emitted(25, 35) Source(25, 31) + SourceIndex(0)
-7 >Emitted(25, 42) Source(25, 38) + SourceIndex(0)
-8 >Emitted(25, 43) Source(25, 39) + SourceIndex(0)
-9 >Emitted(25, 56) Source(25, 52) + SourceIndex(0)
-10>Emitted(25, 57) Source(25, 53) + SourceIndex(0)
-11>Emitted(25, 58) Source(25, 54) + SourceIndex(0)
-12>Emitted(25, 59) Source(25, 55) + SourceIndex(0)
-13>Emitted(25, 60) Source(25, 56) + SourceIndex(0)
-14>Emitted(25, 61) Source(25, 57) + SourceIndex(0)
-15>Emitted(25, 62) Source(25, 58) + SourceIndex(0)
+1->Emitted(24, 17) Source(25, 13) + SourceIndex(0)
+2 >Emitted(24, 25) Source(25, 21) + SourceIndex(0)
+3 >Emitted(24, 26) Source(25, 22) + SourceIndex(0)
+4 >Emitted(24, 30) Source(25, 26) + SourceIndex(0)
+5 >Emitted(24, 31) Source(25, 27) + SourceIndex(0)
+6 >Emitted(24, 35) Source(25, 31) + SourceIndex(0)
+7 >Emitted(24, 42) Source(25, 38) + SourceIndex(0)
+8 >Emitted(24, 43) Source(25, 39) + SourceIndex(0)
+9 >Emitted(24, 56) Source(25, 52) + SourceIndex(0)
+10>Emitted(24, 57) Source(25, 53) + SourceIndex(0)
+11>Emitted(24, 58) Source(25, 54) + SourceIndex(0)
+12>Emitted(24, 59) Source(25, 55) + SourceIndex(0)
+13>Emitted(24, 60) Source(25, 56) + SourceIndex(0)
+14>Emitted(24, 61) Source(25, 57) + SourceIndex(0)
+15>Emitted(24, 62) Source(25, 58) + SourceIndex(0)
 ---
 >>>            }
 1 >^^^^^^^^^^^^
@@ -616,8 +604,8 @@ sourceFile:sourceMapValidationClasses.ts
 1 >
   >        
 2 >            }
-1 >Emitted(26, 13) Source(26, 9) + SourceIndex(0)
-2 >Emitted(26, 14) Source(26, 10) + SourceIndex(0)
+1 >Emitted(25, 13) Source(26, 9) + SourceIndex(0)
+2 >Emitted(25, 14) Source(26, 10) + SourceIndex(0)
 ---
 >>>            return greeters;
 1->^^^^^^^^^^^^
@@ -630,10 +618,10 @@ sourceFile:sourceMapValidationClasses.ts
 2 >            return 
 3 >                   greeters
 4 >                           ;
-1->Emitted(27, 13) Source(28, 9) + SourceIndex(0)
-2 >Emitted(27, 20) Source(28, 16) + SourceIndex(0)
-3 >Emitted(27, 28) Source(28, 24) + SourceIndex(0)
-4 >Emitted(27, 29) Source(28, 25) + SourceIndex(0)
+1->Emitted(26, 13) Source(28, 9) + SourceIndex(0)
+2 >Emitted(26, 20) Source(28, 16) + SourceIndex(0)
+3 >Emitted(26, 28) Source(28, 24) + SourceIndex(0)
+4 >Emitted(26, 29) Source(28, 25) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^
@@ -642,8 +630,8 @@ sourceFile:sourceMapValidationClasses.ts
 1 >
 2 >        
   >            }
-1 >Emitted(28, 9) Source(28, 25) + SourceIndex(0)
-2 >Emitted(28, 10) Source(29, 6) + SourceIndex(0)
+1 >Emitted(27, 9) Source(28, 25) + SourceIndex(0)
+2 >Emitted(27, 10) Source(29, 6) + SourceIndex(0)
 ---
 >>>        var b = foo2("Hello", "World", "!");
 1->^^^^^^^^
@@ -675,19 +663,19 @@ sourceFile:sourceMapValidationClasses.ts
 11>                                       "!"
 12>                                          )
 13>                                           ;
-1->Emitted(29, 9) Source(31, 5) + SourceIndex(0)
-2 >Emitted(29, 13) Source(31, 9) + SourceIndex(0)
-3 >Emitted(29, 14) Source(31, 10) + SourceIndex(0)
-4 >Emitted(29, 17) Source(31, 13) + SourceIndex(0)
-5 >Emitted(29, 21) Source(31, 17) + SourceIndex(0)
-6 >Emitted(29, 22) Source(31, 18) + SourceIndex(0)
-7 >Emitted(29, 29) Source(31, 25) + SourceIndex(0)
-8 >Emitted(29, 31) Source(31, 27) + SourceIndex(0)
-9 >Emitted(29, 38) Source(31, 34) + SourceIndex(0)
-10>Emitted(29, 40) Source(31, 36) + SourceIndex(0)
-11>Emitted(29, 43) Source(31, 39) + SourceIndex(0)
-12>Emitted(29, 44) Source(31, 40) + SourceIndex(0)
-13>Emitted(29, 45) Source(31, 41) + SourceIndex(0)
+1->Emitted(28, 9) Source(31, 5) + SourceIndex(0)
+2 >Emitted(28, 13) Source(31, 9) + SourceIndex(0)
+3 >Emitted(28, 14) Source(31, 10) + SourceIndex(0)
+4 >Emitted(28, 17) Source(31, 13) + SourceIndex(0)
+5 >Emitted(28, 21) Source(31, 17) + SourceIndex(0)
+6 >Emitted(28, 22) Source(31, 18) + SourceIndex(0)
+7 >Emitted(28, 29) Source(31, 25) + SourceIndex(0)
+8 >Emitted(28, 31) Source(31, 27) + SourceIndex(0)
+9 >Emitted(28, 38) Source(31, 34) + SourceIndex(0)
+10>Emitted(28, 40) Source(31, 36) + SourceIndex(0)
+11>Emitted(28, 43) Source(31, 39) + SourceIndex(0)
+12>Emitted(28, 44) Source(31, 40) + SourceIndex(0)
+13>Emitted(28, 45) Source(31, 41) + SourceIndex(0)
 ---
 >>>        // This is simple signle line comment
 1->^^^^^^^^
@@ -695,8 +683,8 @@ sourceFile:sourceMapValidationClasses.ts
 1->
   >    
 2 >        // This is simple signle line comment
-1->Emitted(30, 9) Source(32, 5) + SourceIndex(0)
-2 >Emitted(30, 46) Source(32, 42) + SourceIndex(0)
+1->Emitted(29, 9) Source(32, 5) + SourceIndex(0)
+2 >Emitted(29, 46) Source(32, 42) + SourceIndex(0)
 ---
 >>>        for (var j = 0; j < b.length; j++) {
 1 >^^^^^^^^
@@ -734,23 +722,23 @@ sourceFile:sourceMapValidationClasses.ts
 15>                                       ++
 16>                                         ) 
 17>                                           {
-1 >Emitted(31, 9) Source(33, 5) + SourceIndex(0)
-2 >Emitted(31, 14) Source(33, 10) + SourceIndex(0)
-3 >Emitted(31, 18) Source(33, 14) + SourceIndex(0)
-4 >Emitted(31, 19) Source(33, 15) + SourceIndex(0)
-5 >Emitted(31, 22) Source(33, 18) + SourceIndex(0)
-6 >Emitted(31, 23) Source(33, 19) + SourceIndex(0)
-7 >Emitted(31, 25) Source(33, 21) + SourceIndex(0)
-8 >Emitted(31, 26) Source(33, 22) + SourceIndex(0)
-9 >Emitted(31, 29) Source(33, 25) + SourceIndex(0)
-10>Emitted(31, 30) Source(33, 26) + SourceIndex(0)
-11>Emitted(31, 31) Source(33, 27) + SourceIndex(0)
-12>Emitted(31, 37) Source(33, 33) + SourceIndex(0)
-13>Emitted(31, 39) Source(33, 35) + SourceIndex(0)
-14>Emitted(31, 40) Source(33, 36) + SourceIndex(0)
-15>Emitted(31, 42) Source(33, 38) + SourceIndex(0)
-16>Emitted(31, 44) Source(33, 40) + SourceIndex(0)
-17>Emitted(31, 45) Source(33, 41) + SourceIndex(0)
+1 >Emitted(30, 9) Source(33, 5) + SourceIndex(0)
+2 >Emitted(30, 14) Source(33, 10) + SourceIndex(0)
+3 >Emitted(30, 18) Source(33, 14) + SourceIndex(0)
+4 >Emitted(30, 19) Source(33, 15) + SourceIndex(0)
+5 >Emitted(30, 22) Source(33, 18) + SourceIndex(0)
+6 >Emitted(30, 23) Source(33, 19) + SourceIndex(0)
+7 >Emitted(30, 25) Source(33, 21) + SourceIndex(0)
+8 >Emitted(30, 26) Source(33, 22) + SourceIndex(0)
+9 >Emitted(30, 29) Source(33, 25) + SourceIndex(0)
+10>Emitted(30, 30) Source(33, 26) + SourceIndex(0)
+11>Emitted(30, 31) Source(33, 27) + SourceIndex(0)
+12>Emitted(30, 37) Source(33, 33) + SourceIndex(0)
+13>Emitted(30, 39) Source(33, 35) + SourceIndex(0)
+14>Emitted(30, 40) Source(33, 36) + SourceIndex(0)
+15>Emitted(30, 42) Source(33, 38) + SourceIndex(0)
+16>Emitted(30, 44) Source(33, 40) + SourceIndex(0)
+17>Emitted(30, 45) Source(33, 41) + SourceIndex(0)
 ---
 >>>            b[j].greet();
 1 >^^^^^^^^^^^^
@@ -772,15 +760,15 @@ sourceFile:sourceMapValidationClasses.ts
 7 >                 greet
 8 >                      ()
 9 >                        ;
-1 >Emitted(32, 13) Source(34, 9) + SourceIndex(0)
-2 >Emitted(32, 14) Source(34, 10) + SourceIndex(0)
-3 >Emitted(32, 15) Source(34, 11) + SourceIndex(0)
-4 >Emitted(32, 16) Source(34, 12) + SourceIndex(0)
-5 >Emitted(32, 17) Source(34, 13) + SourceIndex(0)
-6 >Emitted(32, 18) Source(34, 14) + SourceIndex(0)
-7 >Emitted(32, 23) Source(34, 19) + SourceIndex(0)
-8 >Emitted(32, 25) Source(34, 21) + SourceIndex(0)
-9 >Emitted(32, 26) Source(34, 22) + SourceIndex(0)
+1 >Emitted(31, 13) Source(34, 9) + SourceIndex(0)
+2 >Emitted(31, 14) Source(34, 10) + SourceIndex(0)
+3 >Emitted(31, 15) Source(34, 11) + SourceIndex(0)
+4 >Emitted(31, 16) Source(34, 12) + SourceIndex(0)
+5 >Emitted(31, 17) Source(34, 13) + SourceIndex(0)
+6 >Emitted(31, 18) Source(34, 14) + SourceIndex(0)
+7 >Emitted(31, 23) Source(34, 19) + SourceIndex(0)
+8 >Emitted(31, 25) Source(34, 21) + SourceIndex(0)
+9 >Emitted(31, 26) Source(34, 22) + SourceIndex(0)
 ---
 >>>        }
 1 >^^^^^^^^
@@ -789,8 +777,8 @@ sourceFile:sourceMapValidationClasses.ts
 1 >
   >    
 2 >        }
-1 >Emitted(33, 9) Source(35, 5) + SourceIndex(0)
-2 >Emitted(33, 10) Source(35, 6) + SourceIndex(0)
+1 >Emitted(32, 9) Source(35, 5) + SourceIndex(0)
+2 >Emitted(32, 10) Source(35, 6) + SourceIndex(0)
 ---
 >>>    })(Bar = Foo.Bar || (Foo.Bar = {}));
 1->^^^^
@@ -851,17 +839,17 @@ sourceFile:sourceMapValidationClasses.ts
   >                                        b[j].greet();
   >                                    }
   >                                }
-1->Emitted(34, 5) Source(35, 6) + SourceIndex(0)
-2 >Emitted(34, 6) Source(36, 2) + SourceIndex(0)
-3 >Emitted(34, 8) Source(1, 12) + SourceIndex(0)
-4 >Emitted(34, 11) Source(1, 15) + SourceIndex(0)
-5 >Emitted(34, 14) Source(1, 12) + SourceIndex(0)
-6 >Emitted(34, 18) Source(1, 12) + SourceIndex(0)
-7 >Emitted(34, 21) Source(1, 15) + SourceIndex(0)
-8 >Emitted(34, 26) Source(1, 12) + SourceIndex(0)
-9 >Emitted(34, 30) Source(1, 12) + SourceIndex(0)
-10>Emitted(34, 33) Source(1, 15) + SourceIndex(0)
-11>Emitted(34, 41) Source(36, 2) + SourceIndex(0)
+1->Emitted(33, 5) Source(35, 6) + SourceIndex(0)
+2 >Emitted(33, 6) Source(36, 2) + SourceIndex(0)
+3 >Emitted(33, 8) Source(1, 12) + SourceIndex(0)
+4 >Emitted(33, 11) Source(1, 15) + SourceIndex(0)
+5 >Emitted(33, 14) Source(1, 12) + SourceIndex(0)
+6 >Emitted(33, 18) Source(1, 12) + SourceIndex(0)
+7 >Emitted(33, 21) Source(1, 15) + SourceIndex(0)
+8 >Emitted(33, 26) Source(1, 12) + SourceIndex(0)
+9 >Emitted(33, 30) Source(1, 12) + SourceIndex(0)
+10>Emitted(33, 33) Source(1, 15) + SourceIndex(0)
+11>Emitted(33, 41) Source(36, 2) + SourceIndex(0)
 ---
 >>>})(Foo || (Foo = {}));
 1 >
@@ -917,13 +905,13 @@ sourceFile:sourceMapValidationClasses.ts
   >                      b[j].greet();
   >                  }
   >              }
-1 >Emitted(35, 1) Source(35, 6) + SourceIndex(0)
-2 >Emitted(35, 2) Source(36, 1) + SourceIndex(0)
-3 >Emitted(35, 2) Source(1, 1) + SourceIndex(0)
-4 >Emitted(35, 4) Source(1, 8) + SourceIndex(0)
-5 >Emitted(35, 7) Source(1, 11) + SourceIndex(0)
-6 >Emitted(35, 12) Source(1, 8) + SourceIndex(0)
-7 >Emitted(35, 15) Source(1, 11) + SourceIndex(0)
-8 >Emitted(35, 23) Source(36, 2) + SourceIndex(0)
+1 >Emitted(34, 1) Source(35, 6) + SourceIndex(0)
+2 >Emitted(34, 2) Source(36, 1) + SourceIndex(0)
+3 >Emitted(34, 2) Source(1, 1) + SourceIndex(0)
+4 >Emitted(34, 4) Source(1, 8) + SourceIndex(0)
+5 >Emitted(34, 7) Source(1, 11) + SourceIndex(0)
+6 >Emitted(34, 12) Source(1, 8) + SourceIndex(0)
+7 >Emitted(34, 15) Source(1, 11) + SourceIndex(0)
+8 >Emitted(34, 23) Source(36, 2) + SourceIndex(0)
 ---
 >>>//# sourceMappingURL=sourceMapValidationClasses.js.map
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt.diff b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt.diff
index 3405abef34..176762bb20 100644
--- a/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt.diff
+++ b/testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt.diff
@@ -212,30 +212,13 @@
  1->^^^^^^^^
  2 >        ^^^^^^^^^^^^
  3 >                    ^
--4 >                     ^^^->
+ 4 >                     ^^^->
 -1-> {
-+4 >                     ^->
 +1->{
    >    
  2 >        "use strict"
  3 >                    ;
-@@= skipped -132, +132 lines =@@
- 2 >Emitted(5, 21) Source(2, 17) + SourceIndex(0)
- 3 >Emitted(5, 22) Source(2, 18) + SourceIndex(0)
- ---
-+>>>        "use strict";
-+1->^^^^^^^^
-+2 >        ^^^^^^^^^^^^
-+3 >                    ^
-+4 >                     ^^^->
-+1->
-+2 >        "use strict"
-+3 >                    ;
-+1->Emitted(6, 9) Source(2, 5) + SourceIndex(0)
-+2 >Emitted(6, 21) Source(2, 17) + SourceIndex(0)
-+3 >Emitted(6, 22) Source(2, 18) + SourceIndex(0)
-+---
- >>>        class Greeter {
+@@= skipped -136, +136 lines =@@
  1->^^^^^^^^
  2 >        ^^^^^^
  3 >              ^^^^^^^
@@ -244,15 +227,10 @@
  1->
    >
    >    
- 2 >        class 
- 3 >              Greeter
--1->Emitted(6, 9) Source(4, 5) + SourceIndex(0)
--2 >Emitted(6, 15) Source(4, 11) + SourceIndex(0)
--3 >Emitted(6, 22) Source(4, 18) + SourceIndex(0)
-+1->Emitted(7, 9) Source(4, 5) + SourceIndex(0)
-+2 >Emitted(7, 15) Source(4, 11) + SourceIndex(0)
-+3 >Emitted(7, 22) Source(4, 18) + SourceIndex(0)
-+---
+@@= skipped -10, +10 lines =@@
+ 2 >Emitted(6, 15) Source(4, 11) + SourceIndex(0)
+ 3 >Emitted(6, 22) Source(4, 18) + SourceIndex(0)
+ ---
 +>>>            greeting;
 +1->^^^^^^^^^^^^
 +2 >            ^^^^^^^^
@@ -260,9 +238,9 @@
 +1-> {
 +  >        constructor(public 
 +2 >            greeting
-+1->Emitted(8, 13) Source(5, 28) + SourceIndex(0)
-+2 >Emitted(8, 21) Source(5, 36) + SourceIndex(0)
- ---
++1->Emitted(7, 13) Source(5, 28) + SourceIndex(0)
++2 >Emitted(7, 21) Source(5, 36) + SourceIndex(0)
++---
  >>>            constructor(greeting) {
  1->^^^^^^^^^^^^
  2 >            ^^^^^^^^^^^^
@@ -279,10 +257,10 @@
 -2 >Emitted(7, 25) Source(5, 28) + SourceIndex(0)
 -3 >Emitted(7, 33) Source(5, 44) + SourceIndex(0)
 +4 >                                ) 
-+1->Emitted(9, 13) Source(5, 9) + SourceIndex(0)
-+2 >Emitted(9, 25) Source(5, 28) + SourceIndex(0)
-+3 >Emitted(9, 33) Source(5, 44) + SourceIndex(0)
-+4 >Emitted(9, 35) Source(5, 46) + SourceIndex(0)
++1->Emitted(8, 13) Source(5, 9) + SourceIndex(0)
++2 >Emitted(8, 25) Source(5, 28) + SourceIndex(0)
++3 >Emitted(8, 33) Source(5, 44) + SourceIndex(0)
++4 >Emitted(8, 35) Source(5, 46) + SourceIndex(0)
  ---
  >>>                this.greeting = greeting;
 -1->^^^^^^^^^^^^^^^^
@@ -303,8 +281,8 @@
 -4 >Emitted(8, 41) Source(5, 36) + SourceIndex(0)
 -5 >Emitted(8, 42) Source(5, 44) + SourceIndex(0)
 +2 >                                greeting
-+1->Emitted(10, 33) Source(5, 28) + SourceIndex(0)
-+2 >Emitted(10, 41) Source(5, 36) + SourceIndex(0)
++1->Emitted(9, 33) Source(5, 28) + SourceIndex(0)
++2 >Emitted(9, 41) Source(5, 36) + SourceIndex(0)
  ---
  >>>            }
  1 >^^^^^^^^^^^^
@@ -318,8 +296,8 @@
 +1 >: string) {
 +2 >            
 +  >                    }
-+1 >Emitted(11, 13) Source(5, 47) + SourceIndex(0)
-+2 >Emitted(11, 14) Source(6, 10) + SourceIndex(0)
++1 >Emitted(10, 13) Source(5, 47) + SourceIndex(0)
++2 >Emitted(10, 14) Source(6, 10) + SourceIndex(0)
  ---
  >>>            greet() {
  1->^^^^^^^^^^^^
@@ -334,13 +312,13 @@
 -1->Emitted(10, 13) Source(8, 9) + SourceIndex(0)
 -2 >Emitted(10, 18) Source(8, 14) + SourceIndex(0)
 +3 >                 () 
-+1->Emitted(12, 13) Source(8, 9) + SourceIndex(0)
-+2 >Emitted(12, 18) Source(8, 14) + SourceIndex(0)
-+3 >Emitted(12, 21) Source(8, 17) + SourceIndex(0)
++1->Emitted(11, 13) Source(8, 9) + SourceIndex(0)
++2 >Emitted(11, 18) Source(8, 14) + SourceIndex(0)
++3 >Emitted(11, 21) Source(8, 17) + SourceIndex(0)
  ---
  >>>                return "<h1>" + this.greeting + "</h1>";
  1->^^^^^^^^^^^^^^^^
-@@= skipped -76, +94 lines =@@
+@@= skipped -62, +68 lines =@@
  8 >                                             ^^^
  9 >                                                ^^^^^^^
  10>                                                       ^
@@ -363,16 +341,16 @@
 -8 >Emitted(11, 49) Source(9, 45) + SourceIndex(0)
 -9 >Emitted(11, 56) Source(9, 52) + SourceIndex(0)
 -10>Emitted(11, 57) Source(9, 53) + SourceIndex(0)
-+1->Emitted(13, 17) Source(9, 13) + SourceIndex(0)
-+2 >Emitted(13, 24) Source(9, 20) + SourceIndex(0)
-+3 >Emitted(13, 30) Source(9, 26) + SourceIndex(0)
-+4 >Emitted(13, 33) Source(9, 29) + SourceIndex(0)
-+5 >Emitted(13, 37) Source(9, 33) + SourceIndex(0)
-+6 >Emitted(13, 38) Source(9, 34) + SourceIndex(0)
-+7 >Emitted(13, 46) Source(9, 42) + SourceIndex(0)
-+8 >Emitted(13, 49) Source(9, 45) + SourceIndex(0)
-+9 >Emitted(13, 56) Source(9, 52) + SourceIndex(0)
-+10>Emitted(13, 57) Source(9, 53) + SourceIndex(0)
++1->Emitted(12, 17) Source(9, 13) + SourceIndex(0)
++2 >Emitted(12, 24) Source(9, 20) + SourceIndex(0)
++3 >Emitted(12, 30) Source(9, 26) + SourceIndex(0)
++4 >Emitted(12, 33) Source(9, 29) + SourceIndex(0)
++5 >Emitted(12, 37) Source(9, 33) + SourceIndex(0)
++6 >Emitted(12, 38) Source(9, 34) + SourceIndex(0)
++7 >Emitted(12, 46) Source(9, 42) + SourceIndex(0)
++8 >Emitted(12, 49) Source(9, 45) + SourceIndex(0)
++9 >Emitted(12, 56) Source(9, 52) + SourceIndex(0)
++10>Emitted(12, 57) Source(9, 53) + SourceIndex(0)
  ---
  >>>            }
  1 >^^^^^^^^^^^^
@@ -384,8 +362,8 @@
 -2 >Emitted(12, 14) Source(10, 10) + SourceIndex(0)
 +2 >            
 +  >                    }
-+1 >Emitted(14, 13) Source(9, 53) + SourceIndex(0)
-+2 >Emitted(14, 14) Source(10, 10) + SourceIndex(0)
++1 >Emitted(13, 13) Source(9, 53) + SourceIndex(0)
++2 >Emitted(13, 14) Source(10, 10) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^^
@@ -393,7 +371,7 @@
  1 >
    >    }
 -1 >Emitted(13, 10) Source(11, 6) + SourceIndex(0)
-+1 >Emitted(15, 10) Source(11, 6) + SourceIndex(0)
++1 >Emitted(14, 10) Source(11, 6) + SourceIndex(0)
  ---
  >>>        function foo(greeting) {
  1->^^^^^^^^
@@ -417,12 +395,12 @@
 -4 >Emitted(14, 22) Source(14, 18) + SourceIndex(0)
 -5 >Emitted(14, 30) Source(14, 34) + SourceIndex(0)
 +6 >                             ): Greeter 
-+1->Emitted(16, 9) Source(14, 5) + SourceIndex(0)
-+2 >Emitted(16, 18) Source(14, 14) + SourceIndex(0)
-+3 >Emitted(16, 21) Source(14, 17) + SourceIndex(0)
-+4 >Emitted(16, 22) Source(14, 18) + SourceIndex(0)
-+5 >Emitted(16, 30) Source(14, 34) + SourceIndex(0)
-+6 >Emitted(16, 32) Source(14, 45) + SourceIndex(0)
++1->Emitted(15, 9) Source(14, 5) + SourceIndex(0)
++2 >Emitted(15, 18) Source(14, 14) + SourceIndex(0)
++3 >Emitted(15, 21) Source(14, 17) + SourceIndex(0)
++4 >Emitted(15, 22) Source(14, 18) + SourceIndex(0)
++5 >Emitted(15, 30) Source(14, 34) + SourceIndex(0)
++6 >Emitted(15, 32) Source(14, 45) + SourceIndex(0)
  ---
  >>>            return new Greeter(greeting);
  1->^^^^^^^^^^^^
@@ -447,14 +425,14 @@
 -6 >Emitted(15, 40) Source(15, 36) + SourceIndex(0)
 -7 >Emitted(15, 41) Source(15, 37) + SourceIndex(0)
 -8 >Emitted(15, 42) Source(15, 38) + SourceIndex(0)
-+1->Emitted(17, 13) Source(15, 9) + SourceIndex(0)
-+2 >Emitted(17, 20) Source(15, 16) + SourceIndex(0)
-+3 >Emitted(17, 24) Source(15, 20) + SourceIndex(0)
-+4 >Emitted(17, 31) Source(15, 27) + SourceIndex(0)
-+5 >Emitted(17, 32) Source(15, 28) + SourceIndex(0)
-+6 >Emitted(17, 40) Source(15, 36) + SourceIndex(0)
-+7 >Emitted(17, 41) Source(15, 37) + SourceIndex(0)
-+8 >Emitted(17, 42) Source(15, 38) + SourceIndex(0)
++1->Emitted(16, 13) Source(15, 9) + SourceIndex(0)
++2 >Emitted(16, 20) Source(15, 16) + SourceIndex(0)
++3 >Emitted(16, 24) Source(15, 20) + SourceIndex(0)
++4 >Emitted(16, 31) Source(15, 27) + SourceIndex(0)
++5 >Emitted(16, 32) Source(15, 28) + SourceIndex(0)
++6 >Emitted(16, 40) Source(15, 36) + SourceIndex(0)
++7 >Emitted(16, 41) Source(15, 37) + SourceIndex(0)
++8 >Emitted(16, 42) Source(15, 38) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^
@@ -467,8 +445,8 @@
 -2 >Emitted(16, 10) Source(16, 6) + SourceIndex(0)
 +2 >        
 +  >            }
-+1 >Emitted(18, 9) Source(15, 38) + SourceIndex(0)
-+2 >Emitted(18, 10) Source(16, 6) + SourceIndex(0)
++1 >Emitted(17, 9) Source(15, 38) + SourceIndex(0)
++2 >Emitted(17, 10) Source(16, 6) + SourceIndex(0)
  ---
  >>>        var greeter = new Greeter("Hello, world!");
  1->^^^^^^^^
@@ -486,16 +464,16 @@
 -8 >Emitted(17, 50) Source(18, 46) + SourceIndex(0)
 -9 >Emitted(17, 51) Source(18, 47) + SourceIndex(0)
 -10>Emitted(17, 52) Source(18, 48) + SourceIndex(0)
-+1->Emitted(19, 9) Source(18, 5) + SourceIndex(0)
-+2 >Emitted(19, 13) Source(18, 9) + SourceIndex(0)
-+3 >Emitted(19, 20) Source(18, 16) + SourceIndex(0)
-+4 >Emitted(19, 23) Source(18, 19) + SourceIndex(0)
-+5 >Emitted(19, 27) Source(18, 23) + SourceIndex(0)
-+6 >Emitted(19, 34) Source(18, 30) + SourceIndex(0)
-+7 >Emitted(19, 35) Source(18, 31) + SourceIndex(0)
-+8 >Emitted(19, 50) Source(18, 46) + SourceIndex(0)
-+9 >Emitted(19, 51) Source(18, 47) + SourceIndex(0)
-+10>Emitted(19, 52) Source(18, 48) + SourceIndex(0)
++1->Emitted(18, 9) Source(18, 5) + SourceIndex(0)
++2 >Emitted(18, 13) Source(18, 9) + SourceIndex(0)
++3 >Emitted(18, 20) Source(18, 16) + SourceIndex(0)
++4 >Emitted(18, 23) Source(18, 19) + SourceIndex(0)
++5 >Emitted(18, 27) Source(18, 23) + SourceIndex(0)
++6 >Emitted(18, 34) Source(18, 30) + SourceIndex(0)
++7 >Emitted(18, 35) Source(18, 31) + SourceIndex(0)
++8 >Emitted(18, 50) Source(18, 46) + SourceIndex(0)
++9 >Emitted(18, 51) Source(18, 47) + SourceIndex(0)
++10>Emitted(18, 52) Source(18, 48) + SourceIndex(0)
  ---
  >>>        var str = greeter.greet();
  1 >^^^^^^^^
@@ -512,15 +490,15 @@
 -7 >Emitted(18, 32) Source(19, 28) + SourceIndex(0)
 -8 >Emitted(18, 34) Source(19, 30) + SourceIndex(0)
 -9 >Emitted(18, 35) Source(19, 31) + SourceIndex(0)
-+1 >Emitted(20, 9) Source(19, 5) + SourceIndex(0)
-+2 >Emitted(20, 13) Source(19, 9) + SourceIndex(0)
-+3 >Emitted(20, 16) Source(19, 12) + SourceIndex(0)
-+4 >Emitted(20, 19) Source(19, 15) + SourceIndex(0)
-+5 >Emitted(20, 26) Source(19, 22) + SourceIndex(0)
-+6 >Emitted(20, 27) Source(19, 23) + SourceIndex(0)
-+7 >Emitted(20, 32) Source(19, 28) + SourceIndex(0)
-+8 >Emitted(20, 34) Source(19, 30) + SourceIndex(0)
-+9 >Emitted(20, 35) Source(19, 31) + SourceIndex(0)
++1 >Emitted(19, 9) Source(19, 5) + SourceIndex(0)
++2 >Emitted(19, 13) Source(19, 9) + SourceIndex(0)
++3 >Emitted(19, 16) Source(19, 12) + SourceIndex(0)
++4 >Emitted(19, 19) Source(19, 15) + SourceIndex(0)
++5 >Emitted(19, 26) Source(19, 22) + SourceIndex(0)
++6 >Emitted(19, 27) Source(19, 23) + SourceIndex(0)
++7 >Emitted(19, 32) Source(19, 28) + SourceIndex(0)
++8 >Emitted(19, 34) Source(19, 30) + SourceIndex(0)
++9 >Emitted(19, 35) Source(19, 31) + SourceIndex(0)
  ---
  >>>        function foo2(greeting, ...restGreetings /* more greeting */) {
  1->^^^^^^^^
@@ -556,17 +534,17 @@
 +9 >                                                 
 +10>                                                 /* more greeting */: string[]
 +11>                                                                    ) 
-+1->Emitted(21, 9) Source(21, 5) + SourceIndex(0)
-+2 >Emitted(21, 18) Source(21, 14) + SourceIndex(0)
-+3 >Emitted(21, 22) Source(21, 18) + SourceIndex(0)
-+4 >Emitted(21, 23) Source(21, 19) + SourceIndex(0)
-+5 >Emitted(21, 31) Source(21, 35) + SourceIndex(0)
-+6 >Emitted(21, 33) Source(21, 37) + SourceIndex(0)
-+7 >Emitted(21, 36) Source(21, 40) + SourceIndex(0)
-+8 >Emitted(21, 49) Source(21, 53) + SourceIndex(0)
-+9 >Emitted(21, 50) Source(21, 54) + SourceIndex(0)
-+10>Emitted(21, 69) Source(21, 83) + SourceIndex(0)
-+11>Emitted(21, 71) Source(21, 85) + SourceIndex(0)
++1->Emitted(20, 9) Source(21, 5) + SourceIndex(0)
++2 >Emitted(20, 18) Source(21, 14) + SourceIndex(0)
++3 >Emitted(20, 22) Source(21, 18) + SourceIndex(0)
++4 >Emitted(20, 23) Source(21, 19) + SourceIndex(0)
++5 >Emitted(20, 31) Source(21, 35) + SourceIndex(0)
++6 >Emitted(20, 33) Source(21, 37) + SourceIndex(0)
++7 >Emitted(20, 36) Source(21, 40) + SourceIndex(0)
++8 >Emitted(20, 49) Source(21, 53) + SourceIndex(0)
++9 >Emitted(20, 50) Source(21, 54) + SourceIndex(0)
++10>Emitted(20, 69) Source(21, 83) + SourceIndex(0)
++11>Emitted(20, 71) Source(21, 85) + SourceIndex(0)
  ---
  >>>            var greeters = []; /* inline block comment */
  1 >^^^^^^^^^^^^
@@ -591,14 +569,14 @@
 -6 >Emitted(20, 31) Source(22, 38) + SourceIndex(0)
 -7 >Emitted(20, 32) Source(22, 39) + SourceIndex(0)
 -8 >Emitted(20, 58) Source(22, 65) + SourceIndex(0)
-+1 >Emitted(22, 13) Source(22, 9) + SourceIndex(0)
-+2 >Emitted(22, 17) Source(22, 13) + SourceIndex(0)
-+3 >Emitted(22, 25) Source(22, 21) + SourceIndex(0)
-+4 >Emitted(22, 28) Source(22, 35) + SourceIndex(0)
-+5 >Emitted(22, 30) Source(22, 37) + SourceIndex(0)
-+6 >Emitted(22, 31) Source(22, 38) + SourceIndex(0)
-+7 >Emitted(22, 32) Source(22, 39) + SourceIndex(0)
-+8 >Emitted(22, 58) Source(22, 65) + SourceIndex(0)
++1 >Emitted(21, 13) Source(22, 9) + SourceIndex(0)
++2 >Emitted(21, 17) Source(22, 13) + SourceIndex(0)
++3 >Emitted(21, 25) Source(22, 21) + SourceIndex(0)
++4 >Emitted(21, 28) Source(22, 35) + SourceIndex(0)
++5 >Emitted(21, 30) Source(22, 37) + SourceIndex(0)
++6 >Emitted(21, 31) Source(22, 38) + SourceIndex(0)
++7 >Emitted(21, 32) Source(22, 39) + SourceIndex(0)
++8 >Emitted(21, 58) Source(22, 65) + SourceIndex(0)
  ---
  >>>            greeters[0] = new Greeter(greeting);
  1 >^^^^^^^^^^^^
@@ -618,18 +596,18 @@
 -10>Emitted(21, 47) Source(23, 43) + SourceIndex(0)
 -11>Emitted(21, 48) Source(23, 44) + SourceIndex(0)
 -12>Emitted(21, 49) Source(23, 45) + SourceIndex(0)
-+1 >Emitted(23, 13) Source(23, 9) + SourceIndex(0)
-+2 >Emitted(23, 21) Source(23, 17) + SourceIndex(0)
-+3 >Emitted(23, 22) Source(23, 18) + SourceIndex(0)
-+4 >Emitted(23, 23) Source(23, 19) + SourceIndex(0)
-+5 >Emitted(23, 24) Source(23, 20) + SourceIndex(0)
-+6 >Emitted(23, 27) Source(23, 23) + SourceIndex(0)
-+7 >Emitted(23, 31) Source(23, 27) + SourceIndex(0)
-+8 >Emitted(23, 38) Source(23, 34) + SourceIndex(0)
-+9 >Emitted(23, 39) Source(23, 35) + SourceIndex(0)
-+10>Emitted(23, 47) Source(23, 43) + SourceIndex(0)
-+11>Emitted(23, 48) Source(23, 44) + SourceIndex(0)
-+12>Emitted(23, 49) Source(23, 45) + SourceIndex(0)
++1 >Emitted(22, 13) Source(23, 9) + SourceIndex(0)
++2 >Emitted(22, 21) Source(23, 17) + SourceIndex(0)
++3 >Emitted(22, 22) Source(23, 18) + SourceIndex(0)
++4 >Emitted(22, 23) Source(23, 19) + SourceIndex(0)
++5 >Emitted(22, 24) Source(23, 20) + SourceIndex(0)
++6 >Emitted(22, 27) Source(23, 23) + SourceIndex(0)
++7 >Emitted(22, 31) Source(23, 27) + SourceIndex(0)
++8 >Emitted(22, 38) Source(23, 34) + SourceIndex(0)
++9 >Emitted(22, 39) Source(23, 35) + SourceIndex(0)
++10>Emitted(22, 47) Source(23, 43) + SourceIndex(0)
++11>Emitted(22, 48) Source(23, 44) + SourceIndex(0)
++12>Emitted(22, 49) Source(23, 45) + SourceIndex(0)
  ---
  >>>            for (var i = 0; i < restGreetings.length; i++) {
  1->^^^^^^^^^^^^
@@ -654,23 +632,23 @@
 -15>Emitted(22, 58) Source(24, 54) + SourceIndex(0)
 -16>Emitted(22, 60) Source(24, 56) + SourceIndex(0)
 -17>Emitted(22, 61) Source(24, 57) + SourceIndex(0)
-+1->Emitted(24, 13) Source(24, 9) + SourceIndex(0)
-+2 >Emitted(24, 18) Source(24, 14) + SourceIndex(0)
-+3 >Emitted(24, 22) Source(24, 18) + SourceIndex(0)
-+4 >Emitted(24, 23) Source(24, 19) + SourceIndex(0)
-+5 >Emitted(24, 26) Source(24, 22) + SourceIndex(0)
-+6 >Emitted(24, 27) Source(24, 23) + SourceIndex(0)
-+7 >Emitted(24, 29) Source(24, 25) + SourceIndex(0)
-+8 >Emitted(24, 30) Source(24, 26) + SourceIndex(0)
-+9 >Emitted(24, 33) Source(24, 29) + SourceIndex(0)
-+10>Emitted(24, 46) Source(24, 42) + SourceIndex(0)
-+11>Emitted(24, 47) Source(24, 43) + SourceIndex(0)
-+12>Emitted(24, 53) Source(24, 49) + SourceIndex(0)
-+13>Emitted(24, 55) Source(24, 51) + SourceIndex(0)
-+14>Emitted(24, 56) Source(24, 52) + SourceIndex(0)
-+15>Emitted(24, 58) Source(24, 54) + SourceIndex(0)
-+16>Emitted(24, 60) Source(24, 56) + SourceIndex(0)
-+17>Emitted(24, 61) Source(24, 57) + SourceIndex(0)
++1->Emitted(23, 13) Source(24, 9) + SourceIndex(0)
++2 >Emitted(23, 18) Source(24, 14) + SourceIndex(0)
++3 >Emitted(23, 22) Source(24, 18) + SourceIndex(0)
++4 >Emitted(23, 23) Source(24, 19) + SourceIndex(0)
++5 >Emitted(23, 26) Source(24, 22) + SourceIndex(0)
++6 >Emitted(23, 27) Source(24, 23) + SourceIndex(0)
++7 >Emitted(23, 29) Source(24, 25) + SourceIndex(0)
++8 >Emitted(23, 30) Source(24, 26) + SourceIndex(0)
++9 >Emitted(23, 33) Source(24, 29) + SourceIndex(0)
++10>Emitted(23, 46) Source(24, 42) + SourceIndex(0)
++11>Emitted(23, 47) Source(24, 43) + SourceIndex(0)
++12>Emitted(23, 53) Source(24, 49) + SourceIndex(0)
++13>Emitted(23, 55) Source(24, 51) + SourceIndex(0)
++14>Emitted(23, 56) Source(24, 52) + SourceIndex(0)
++15>Emitted(23, 58) Source(24, 54) + SourceIndex(0)
++16>Emitted(23, 60) Source(24, 56) + SourceIndex(0)
++17>Emitted(23, 61) Source(24, 57) + SourceIndex(0)
  ---
  >>>                greeters.push(new Greeter(restGreetings[i]));
  1->^^^^^^^^^^^^^^^^
@@ -693,21 +671,21 @@
 -13>Emitted(23, 60) Source(25, 56) + SourceIndex(0)
 -14>Emitted(23, 61) Source(25, 57) + SourceIndex(0)
 -15>Emitted(23, 62) Source(25, 58) + SourceIndex(0)
-+1->Emitted(25, 17) Source(25, 13) + SourceIndex(0)
-+2 >Emitted(25, 25) Source(25, 21) + SourceIndex(0)
-+3 >Emitted(25, 26) Source(25, 22) + SourceIndex(0)
-+4 >Emitted(25, 30) Source(25, 26) + SourceIndex(0)
-+5 >Emitted(25, 31) Source(25, 27) + SourceIndex(0)
-+6 >Emitted(25, 35) Source(25, 31) + SourceIndex(0)
-+7 >Emitted(25, 42) Source(25, 38) + SourceIndex(0)
-+8 >Emitted(25, 43) Source(25, 39) + SourceIndex(0)
-+9 >Emitted(25, 56) Source(25, 52) + SourceIndex(0)
-+10>Emitted(25, 57) Source(25, 53) + SourceIndex(0)
-+11>Emitted(25, 58) Source(25, 54) + SourceIndex(0)
-+12>Emitted(25, 59) Source(25, 55) + SourceIndex(0)
-+13>Emitted(25, 60) Source(25, 56) + SourceIndex(0)
-+14>Emitted(25, 61) Source(25, 57) + SourceIndex(0)
-+15>Emitted(25, 62) Source(25, 58) + SourceIndex(0)
++1->Emitted(24, 17) Source(25, 13) + SourceIndex(0)
++2 >Emitted(24, 25) Source(25, 21) + SourceIndex(0)
++3 >Emitted(24, 26) Source(25, 22) + SourceIndex(0)
++4 >Emitted(24, 30) Source(25, 26) + SourceIndex(0)
++5 >Emitted(24, 31) Source(25, 27) + SourceIndex(0)
++6 >Emitted(24, 35) Source(25, 31) + SourceIndex(0)
++7 >Emitted(24, 42) Source(25, 38) + SourceIndex(0)
++8 >Emitted(24, 43) Source(25, 39) + SourceIndex(0)
++9 >Emitted(24, 56) Source(25, 52) + SourceIndex(0)
++10>Emitted(24, 57) Source(25, 53) + SourceIndex(0)
++11>Emitted(24, 58) Source(25, 54) + SourceIndex(0)
++12>Emitted(24, 59) Source(25, 55) + SourceIndex(0)
++13>Emitted(24, 60) Source(25, 56) + SourceIndex(0)
++14>Emitted(24, 61) Source(25, 57) + SourceIndex(0)
++15>Emitted(24, 62) Source(25, 58) + SourceIndex(0)
  ---
  >>>            }
  1 >^^^^^^^^^^^^
@@ -717,8 +695,8 @@
  2 >            }
 -1 >Emitted(24, 13) Source(26, 9) + SourceIndex(0)
 -2 >Emitted(24, 14) Source(26, 10) + SourceIndex(0)
-+1 >Emitted(26, 13) Source(26, 9) + SourceIndex(0)
-+2 >Emitted(26, 14) Source(26, 10) + SourceIndex(0)
++1 >Emitted(25, 13) Source(26, 9) + SourceIndex(0)
++2 >Emitted(25, 14) Source(26, 10) + SourceIndex(0)
  ---
  >>>            return greeters;
  1->^^^^^^^^^^^^
@@ -730,10 +708,10 @@
 -2 >Emitted(25, 20) Source(28, 16) + SourceIndex(0)
 -3 >Emitted(25, 28) Source(28, 24) + SourceIndex(0)
 -4 >Emitted(25, 29) Source(28, 25) + SourceIndex(0)
-+1->Emitted(27, 13) Source(28, 9) + SourceIndex(0)
-+2 >Emitted(27, 20) Source(28, 16) + SourceIndex(0)
-+3 >Emitted(27, 28) Source(28, 24) + SourceIndex(0)
-+4 >Emitted(27, 29) Source(28, 25) + SourceIndex(0)
++1->Emitted(26, 13) Source(28, 9) + SourceIndex(0)
++2 >Emitted(26, 20) Source(28, 16) + SourceIndex(0)
++3 >Emitted(26, 28) Source(28, 24) + SourceIndex(0)
++4 >Emitted(26, 29) Source(28, 25) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^
@@ -746,8 +724,8 @@
 -2 >Emitted(26, 10) Source(29, 6) + SourceIndex(0)
 +2 >        
 +  >            }
-+1 >Emitted(28, 9) Source(28, 25) + SourceIndex(0)
-+2 >Emitted(28, 10) Source(29, 6) + SourceIndex(0)
++1 >Emitted(27, 9) Source(28, 25) + SourceIndex(0)
++2 >Emitted(27, 10) Source(29, 6) + SourceIndex(0)
  ---
  >>>        var b = foo2("Hello", "World", "!");
  1->^^^^^^^^
@@ -768,19 +746,19 @@
 -11>Emitted(27, 43) Source(31, 39) + SourceIndex(0)
 -12>Emitted(27, 44) Source(31, 40) + SourceIndex(0)
 -13>Emitted(27, 45) Source(31, 41) + SourceIndex(0)
-+1->Emitted(29, 9) Source(31, 5) + SourceIndex(0)
-+2 >Emitted(29, 13) Source(31, 9) + SourceIndex(0)
-+3 >Emitted(29, 14) Source(31, 10) + SourceIndex(0)
-+4 >Emitted(29, 17) Source(31, 13) + SourceIndex(0)
-+5 >Emitted(29, 21) Source(31, 17) + SourceIndex(0)
-+6 >Emitted(29, 22) Source(31, 18) + SourceIndex(0)
-+7 >Emitted(29, 29) Source(31, 25) + SourceIndex(0)
-+8 >Emitted(29, 31) Source(31, 27) + SourceIndex(0)
-+9 >Emitted(29, 38) Source(31, 34) + SourceIndex(0)
-+10>Emitted(29, 40) Source(31, 36) + SourceIndex(0)
-+11>Emitted(29, 43) Source(31, 39) + SourceIndex(0)
-+12>Emitted(29, 44) Source(31, 40) + SourceIndex(0)
-+13>Emitted(29, 45) Source(31, 41) + SourceIndex(0)
++1->Emitted(28, 9) Source(31, 5) + SourceIndex(0)
++2 >Emitted(28, 13) Source(31, 9) + SourceIndex(0)
++3 >Emitted(28, 14) Source(31, 10) + SourceIndex(0)
++4 >Emitted(28, 17) Source(31, 13) + SourceIndex(0)
++5 >Emitted(28, 21) Source(31, 17) + SourceIndex(0)
++6 >Emitted(28, 22) Source(31, 18) + SourceIndex(0)
++7 >Emitted(28, 29) Source(31, 25) + SourceIndex(0)
++8 >Emitted(28, 31) Source(31, 27) + SourceIndex(0)
++9 >Emitted(28, 38) Source(31, 34) + SourceIndex(0)
++10>Emitted(28, 40) Source(31, 36) + SourceIndex(0)
++11>Emitted(28, 43) Source(31, 39) + SourceIndex(0)
++12>Emitted(28, 44) Source(31, 40) + SourceIndex(0)
++13>Emitted(28, 45) Source(31, 41) + SourceIndex(0)
  ---
  >>>        // This is simple signle line comment
  1->^^^^^^^^
@@ -790,8 +768,8 @@
  2 >        // This is simple signle line comment
 -1->Emitted(28, 9) Source(32, 5) + SourceIndex(0)
 -2 >Emitted(28, 46) Source(32, 42) + SourceIndex(0)
-+1->Emitted(30, 9) Source(32, 5) + SourceIndex(0)
-+2 >Emitted(30, 46) Source(32, 42) + SourceIndex(0)
++1->Emitted(29, 9) Source(32, 5) + SourceIndex(0)
++2 >Emitted(29, 46) Source(32, 42) + SourceIndex(0)
  ---
  >>>        for (var j = 0; j < b.length; j++) {
  1 >^^^^^^^^
@@ -816,23 +794,23 @@
 -15>Emitted(29, 42) Source(33, 38) + SourceIndex(0)
 -16>Emitted(29, 44) Source(33, 40) + SourceIndex(0)
 -17>Emitted(29, 45) Source(33, 41) + SourceIndex(0)
-+1 >Emitted(31, 9) Source(33, 5) + SourceIndex(0)
-+2 >Emitted(31, 14) Source(33, 10) + SourceIndex(0)
-+3 >Emitted(31, 18) Source(33, 14) + SourceIndex(0)
-+4 >Emitted(31, 19) Source(33, 15) + SourceIndex(0)
-+5 >Emitted(31, 22) Source(33, 18) + SourceIndex(0)
-+6 >Emitted(31, 23) Source(33, 19) + SourceIndex(0)
-+7 >Emitted(31, 25) Source(33, 21) + SourceIndex(0)
-+8 >Emitted(31, 26) Source(33, 22) + SourceIndex(0)
-+9 >Emitted(31, 29) Source(33, 25) + SourceIndex(0)
-+10>Emitted(31, 30) Source(33, 26) + SourceIndex(0)
-+11>Emitted(31, 31) Source(33, 27) + SourceIndex(0)
-+12>Emitted(31, 37) Source(33, 33) + SourceIndex(0)
-+13>Emitted(31, 39) Source(33, 35) + SourceIndex(0)
-+14>Emitted(31, 40) Source(33, 36) + SourceIndex(0)
-+15>Emitted(31, 42) Source(33, 38) + SourceIndex(0)
-+16>Emitted(31, 44) Source(33, 40) + SourceIndex(0)
-+17>Emitted(31, 45) Source(33, 41) + SourceIndex(0)
++1 >Emitted(30, 9) Source(33, 5) + SourceIndex(0)
++2 >Emitted(30, 14) Source(33, 10) + SourceIndex(0)
++3 >Emitted(30, 18) Source(33, 14) + SourceIndex(0)
++4 >Emitted(30, 19) Source(33, 15) + SourceIndex(0)
++5 >Emitted(30, 22) Source(33, 18) + SourceIndex(0)
++6 >Emitted(30, 23) Source(33, 19) + SourceIndex(0)
++7 >Emitted(30, 25) Source(33, 21) + SourceIndex(0)
++8 >Emitted(30, 26) Source(33, 22) + SourceIndex(0)
++9 >Emitted(30, 29) Source(33, 25) + SourceIndex(0)
++10>Emitted(30, 30) Source(33, 26) + SourceIndex(0)
++11>Emitted(30, 31) Source(33, 27) + SourceIndex(0)
++12>Emitted(30, 37) Source(33, 33) + SourceIndex(0)
++13>Emitted(30, 39) Source(33, 35) + SourceIndex(0)
++14>Emitted(30, 40) Source(33, 36) + SourceIndex(0)
++15>Emitted(30, 42) Source(33, 38) + SourceIndex(0)
++16>Emitted(30, 44) Source(33, 40) + SourceIndex(0)
++17>Emitted(30, 45) Source(33, 41) + SourceIndex(0)
  ---
  >>>            b[j].greet();
  1 >^^^^^^^^^^^^
@@ -849,15 +827,15 @@
 -7 >Emitted(30, 23) Source(34, 19) + SourceIndex(0)
 -8 >Emitted(30, 25) Source(34, 21) + SourceIndex(0)
 -9 >Emitted(30, 26) Source(34, 22) + SourceIndex(0)
-+1 >Emitted(32, 13) Source(34, 9) + SourceIndex(0)
-+2 >Emitted(32, 14) Source(34, 10) + SourceIndex(0)
-+3 >Emitted(32, 15) Source(34, 11) + SourceIndex(0)
-+4 >Emitted(32, 16) Source(34, 12) + SourceIndex(0)
-+5 >Emitted(32, 17) Source(34, 13) + SourceIndex(0)
-+6 >Emitted(32, 18) Source(34, 14) + SourceIndex(0)
-+7 >Emitted(32, 23) Source(34, 19) + SourceIndex(0)
-+8 >Emitted(32, 25) Source(34, 21) + SourceIndex(0)
-+9 >Emitted(32, 26) Source(34, 22) + SourceIndex(0)
++1 >Emitted(31, 13) Source(34, 9) + SourceIndex(0)
++2 >Emitted(31, 14) Source(34, 10) + SourceIndex(0)
++3 >Emitted(31, 15) Source(34, 11) + SourceIndex(0)
++4 >Emitted(31, 16) Source(34, 12) + SourceIndex(0)
++5 >Emitted(31, 17) Source(34, 13) + SourceIndex(0)
++6 >Emitted(31, 18) Source(34, 14) + SourceIndex(0)
++7 >Emitted(31, 23) Source(34, 19) + SourceIndex(0)
++8 >Emitted(31, 25) Source(34, 21) + SourceIndex(0)
++9 >Emitted(31, 26) Source(34, 22) + SourceIndex(0)
  ---
  >>>        }
  1 >^^^^^^^^
@@ -867,8 +845,8 @@
  2 >        }
 -1 >Emitted(31, 9) Source(35, 5) + SourceIndex(0)
 -2 >Emitted(31, 10) Source(35, 6) + SourceIndex(0)
-+1 >Emitted(33, 9) Source(35, 5) + SourceIndex(0)
-+2 >Emitted(33, 10) Source(35, 6) + SourceIndex(0)
++1 >Emitted(32, 9) Source(35, 5) + SourceIndex(0)
++2 >Emitted(32, 10) Source(35, 6) + SourceIndex(0)
  ---
  >>>    })(Bar = Foo.Bar || (Foo.Bar = {}));
  1->^^^^
@@ -920,17 +898,17 @@
 -7 >Emitted(32, 26) Source(1, 12) + SourceIndex(0)
 -8 >Emitted(32, 33) Source(1, 15) + SourceIndex(0)
 -9 >Emitted(32, 41) Source(36, 2) + SourceIndex(0)
-+1->Emitted(34, 5) Source(35, 6) + SourceIndex(0)
-+2 >Emitted(34, 6) Source(36, 2) + SourceIndex(0)
-+3 >Emitted(34, 8) Source(1, 12) + SourceIndex(0)
-+4 >Emitted(34, 11) Source(1, 15) + SourceIndex(0)
-+5 >Emitted(34, 14) Source(1, 12) + SourceIndex(0)
-+6 >Emitted(34, 18) Source(1, 12) + SourceIndex(0)
-+7 >Emitted(34, 21) Source(1, 15) + SourceIndex(0)
-+8 >Emitted(34, 26) Source(1, 12) + SourceIndex(0)
-+9 >Emitted(34, 30) Source(1, 12) + SourceIndex(0)
-+10>Emitted(34, 33) Source(1, 15) + SourceIndex(0)
-+11>Emitted(34, 41) Source(36, 2) + SourceIndex(0)
++1->Emitted(33, 5) Source(35, 6) + SourceIndex(0)
++2 >Emitted(33, 6) Source(36, 2) + SourceIndex(0)
++3 >Emitted(33, 8) Source(1, 12) + SourceIndex(0)
++4 >Emitted(33, 11) Source(1, 15) + SourceIndex(0)
++5 >Emitted(33, 14) Source(1, 12) + SourceIndex(0)
++6 >Emitted(33, 18) Source(1, 12) + SourceIndex(0)
++7 >Emitted(33, 21) Source(1, 15) + SourceIndex(0)
++8 >Emitted(33, 26) Source(1, 12) + SourceIndex(0)
++9 >Emitted(33, 30) Source(1, 12) + SourceIndex(0)
++10>Emitted(33, 33) Source(1, 15) + SourceIndex(0)
++11>Emitted(33, 41) Source(36, 2) + SourceIndex(0)
  ---
  >>>})(Foo || (Foo = {}));
  1 >
@@ -976,13 +954,13 @@
 -5 >Emitted(33, 12) Source(1, 8) + SourceIndex(0)
 -6 >Emitted(33, 15) Source(1, 11) + SourceIndex(0)
 -7 >Emitted(33, 23) Source(36, 2) + SourceIndex(0)
-+1 >Emitted(35, 1) Source(35, 6) + SourceIndex(0)
-+2 >Emitted(35, 2) Source(36, 1) + SourceIndex(0)
-+3 >Emitted(35, 2) Source(1, 1) + SourceIndex(0)
-+4 >Emitted(35, 4) Source(1, 8) + SourceIndex(0)
-+5 >Emitted(35, 7) Source(1, 11) + SourceIndex(0)
-+6 >Emitted(35, 12) Source(1, 8) + SourceIndex(0)
-+7 >Emitted(35, 15) Source(1, 11) + SourceIndex(0)
-+8 >Emitted(35, 23) Source(36, 2) + SourceIndex(0)
++1 >Emitted(34, 1) Source(35, 6) + SourceIndex(0)
++2 >Emitted(34, 2) Source(36, 1) + SourceIndex(0)
++3 >Emitted(34, 2) Source(1, 1) + SourceIndex(0)
++4 >Emitted(34, 4) Source(1, 8) + SourceIndex(0)
++5 >Emitted(34, 7) Source(1, 11) + SourceIndex(0)
++6 >Emitted(34, 12) Source(1, 8) + SourceIndex(0)
++7 >Emitted(34, 15) Source(1, 11) + SourceIndex(0)
++8 >Emitted(34, 23) Source(36, 2) + SourceIndex(0)
  ---
  >>>//# sourceMappingURL=sourceMapValidationClasses.js.map
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js b/testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js
index 1daf03a3f2..a87231c58e 100644
--- a/testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js
@@ -18,6 +18,7 @@ a.other.length;  // Error expected here
 
 
 //// [specialIntersectionsInMappedTypes.js]
+"use strict";
 // Repro from #50683
 const a = {
     left: "align-left",
diff --git a/testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js.diff b/testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js.diff
deleted file mode 100644
index 779e459e55..0000000000
--- a/testdata/baselines/reference/submodule/compiler/specialIntersectionsInMappedTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.specialIntersectionsInMappedTypes.js
-+++ new.specialIntersectionsInMappedTypes.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [specialIntersectionsInMappedTypes.js]
--"use strict";
- // Repro from #50683
- const a = {
-     left: "align-left",
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js b/testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js
index 29ed969330..e14361fa01 100644
--- a/testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js
+++ b/testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js
@@ -22,6 +22,7 @@ function test2<T extends Apple | Orange>(item: T): T {
 
 
 //// [spreadExpressionContextualType.js]
+"use strict";
 // Repro from #43966
 function test(item) {
     return Object.assign({}, item);
diff --git a/testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js.diff b/testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js.diff
deleted file mode 100644
index c7e22d7349..0000000000
--- a/testdata/baselines/reference/submodule/compiler/spreadExpressionContextualType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadExpressionContextualType.js
-+++ new.spreadExpressionContextualType.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [spreadExpressionContextualType.js]
--"use strict";
- // Repro from #43966
- function test(item) {
-     return Object.assign({}, item);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js b/testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js
index 111e570fda..d366ff7c55 100644
--- a/testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js
+++ b/testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js
@@ -30,6 +30,7 @@ function billOwner(pet: Animal2) {
 
 
 //// [spreadIdenticalTypesRemoved.js]
+"use strict";
 function clonePet(pet, fullCopy) {
     return Object.assign({ name: pet.name, kind: pet.kind }, (fullCopy && pet));
 }
diff --git a/testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js.diff b/testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js.diff
deleted file mode 100644
index e1bf189ac8..0000000000
--- a/testdata/baselines/reference/submodule/compiler/spreadIdenticalTypesRemoved.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadIdenticalTypesRemoved.js
-+++ new.spreadIdenticalTypesRemoved.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [spreadIdenticalTypesRemoved.js]
--"use strict";
- function clonePet(pet, fullCopy) {
-     return Object.assign({ name: pet.name, kind: pet.kind }, (fullCopy && pet));
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js b/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js
index 8e39de46a1..4f2e773772 100644
--- a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js
+++ b/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js
@@ -23,6 +23,7 @@ const v_cba = { ...c, ...b, ...a };
 
 
 //// [spreadObjectPermutations.js]
+"use strict";
 const v_a = Object.assign({}, a);
 const v_b = Object.assign({}, b);
 const v_c = Object.assign({}, c);
diff --git a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js.diff b/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js.diff
deleted file mode 100644
index 087b9bb0a7..0000000000
--- a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=false).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadObjectPermutations(exactoptionalpropertytypes=false).js
-+++ new.spreadObjectPermutations(exactoptionalpropertytypes=false).js
-@@= skipped -22, +22 lines =@@
-
-
- //// [spreadObjectPermutations.js]
--"use strict";
- const v_a = Object.assign({}, a);
- const v_b = Object.assign({}, b);
- const v_c = Object.assign({}, c);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js b/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js
index 8e39de46a1..4f2e773772 100644
--- a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js
+++ b/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js
@@ -23,6 +23,7 @@ const v_cba = { ...c, ...b, ...a };
 
 
 //// [spreadObjectPermutations.js]
+"use strict";
 const v_a = Object.assign({}, a);
 const v_b = Object.assign({}, b);
 const v_c = Object.assign({}, c);
diff --git a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js.diff b/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js.diff
deleted file mode 100644
index f16086d17d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/spreadObjectPermutations(exactoptionalpropertytypes=true).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadObjectPermutations(exactoptionalpropertytypes=true).js
-+++ new.spreadObjectPermutations(exactoptionalpropertytypes=true).js
-@@= skipped -22, +22 lines =@@
-
-
- //// [spreadObjectPermutations.js]
--"use strict";
- const v_a = Object.assign({}, a);
- const v_b = Object.assign({}, b);
- const v_c = Object.assign({}, c);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js b/testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js
index 80fad54bb0..9aba8b291a 100644
--- a/testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js
+++ b/testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js
@@ -5,4 +5,5 @@ declare const m: { [k: string]: string };
 const x: { [k: string]: string } = { ...m, ["a" + "b"]: "" };
 
 //// [spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js]
+"use strict";
 const x = Object.assign(Object.assign({}, m), { ["a" + "b"]: "" });
diff --git a/testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js.diff b/testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js.diff
deleted file mode 100644
index ee6088d138..0000000000
--- a/testdata/baselines/reference/submodule/compiler/spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js
-+++ new.spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js
-@@= skipped -4, +4 lines =@@
- const x: { [k: string]: string } = { ...m, ["a" + "b"]: "" };
-
- //// [spreadObjectWithIndexDoesNotAddUndefinedToLocalIndex.js]
--"use strict";
- const x = Object.assign(Object.assign({}, m), { ["a" + "b"]: "" });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js b/testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js
index 597b2ebd2c..fd22ce6ddc 100644
--- a/testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js
+++ b/testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js
@@ -16,6 +16,7 @@ recordsOfRecordsOrEmpty.propB = {...(foo && {foo})} // OK
 recordsOfRecordsOrEmpty.propC = {...(foo !== undefined && {foo})} // OK
 
 //// [spreadOfObjectLiteralAssignableToIndexSignature.js]
+"use strict";
 const foo = {}; // OK
 const recordOfRecords = {};
 recordOfRecords.propA = Object.assign({}, (foo !== undefined ? { foo } : {})); // OK
diff --git a/testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js.diff b/testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js.diff
deleted file mode 100644
index 9dd126bfda..0000000000
--- a/testdata/baselines/reference/submodule/compiler/spreadOfObjectLiteralAssignableToIndexSignature.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadOfObjectLiteralAssignableToIndexSignature.js
-+++ new.spreadOfObjectLiteralAssignableToIndexSignature.js
-@@= skipped -15, +15 lines =@@
- recordsOfRecordsOrEmpty.propC = {...(foo !== undefined && {foo})} // OK
-
- //// [spreadOfObjectLiteralAssignableToIndexSignature.js]
--"use strict";
- const foo = {}; // OK
- const recordOfRecords = {};
- recordOfRecords.propA = Object.assign({}, (foo !== undefined ? { foo } : {})); // OK
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js b/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js
index 84873a95d4..0a6bb1d2e2 100644
--- a/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js
+++ b/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js
@@ -9,6 +9,7 @@ class Abc {
 }
 
 //// [strictBooleanMemberAssignability.js]
+"use strict";
 class Abc {
     def;
     constructor() {
diff --git a/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js.diff b/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js.diff
index a40fe2b56a..f2bdfde70c 100644
--- a/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/strictBooleanMemberAssignability.js.diff
@@ -1,10 +1,8 @@
 --- old.strictBooleanMemberAssignability.js
 +++ new.strictBooleanMemberAssignability.js
-@@= skipped -8, +8 lines =@@
- }
-
+@@= skipped -10, +10 lines =@@
  //// [strictBooleanMemberAssignability.js]
--"use strict";
+ "use strict";
  class Abc {
 +    def;
      constructor() {
diff --git a/testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js b/testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js
index 1008faaf04..b77c43109b 100644
--- a/testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js
+++ b/testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js
@@ -53,6 +53,7 @@ const t6: A[] = coAndContraArray([], acceptA);
 
 
 //// [strictFunctionTypes1.js]
+"use strict";
 const x1 = f1(fo, fs); // (x: string) => void
 const x2 = f2("abc", fo, fs); // "abc"
 const x3 = f3("abc", fo, fx); // "abc" | "def"
diff --git a/testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js.diff b/testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js.diff
deleted file mode 100644
index 82ed6c12a7..0000000000
--- a/testdata/baselines/reference/submodule/compiler/strictFunctionTypes1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.strictFunctionTypes1.js
-+++ new.strictFunctionTypes1.js
-@@= skipped -52, +52 lines =@@
-
-
- //// [strictFunctionTypes1.js]
--"use strict";
- const x1 = f1(fo, fs); // (x: string) => void
- const x2 = f2("abc", fo, fs); // "abc"
- const x3 = f3("abc", fo, fx); // "abc" | "def"
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js b/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js
index 2b746bef35..31a45c19c4 100644
--- a/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js
+++ b/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js
@@ -69,7 +69,6 @@ class A {
 class B extends A {
     s = 9;
     constructor() {
-        "use strict"; // No error
         "use strict"; // No error
         super();
     }
@@ -93,7 +92,6 @@ class D extends A {
 class Bs extends A {
     static s = 9;
     constructor() {
-        "use strict"; // No error
         "use strict"; // No error
         super();
     }
diff --git a/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js.diff b/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js.diff
index 96f11906ea..1cf5c706aa 100644
--- a/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/strictModeInConstructor.js.diff
@@ -7,7 +7,6 @@
 +    s = 9;
      constructor() {
          "use strict"; // No error
-+        "use strict"; // No error
          super();
 -        this.s = 9;
      }
@@ -34,7 +33,6 @@
 +    static s = 9;
      constructor() {
          "use strict"; // No error
-+        "use strict"; // No error
          super();
      }
  }
diff --git a/testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js b/testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js
index 05466753fe..7b70fa3721 100644
--- a/testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js
+++ b/testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js
@@ -32,7 +32,6 @@ function foo() {
 //// [strictModeReservedWord.js]
 let let = 10;
 function foo() {
-    "use strict";
     "use strict";
     var public = 10;
     var static = "hi";
diff --git a/testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js.diff b/testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js.diff
deleted file mode 100644
index 0c415cf166..0000000000
--- a/testdata/baselines/reference/submodule/compiler/strictModeReservedWord.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.strictModeReservedWord.js
-+++ new.strictModeReservedWord.js
-@@= skipped -32, +32 lines =@@
- let let = 10;
- function foo() {
-     "use strict";
-+    "use strict";
-     var public = 10;
-     var static = "hi";
-     let let = "blah";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js b/testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js
index e36e1f524f..4c6479269c 100644
--- a/testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js
+++ b/testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js
@@ -7,4 +7,3 @@ import public = require("1");
 //// [strictModeReservedWordInImportEqualDeclaration.js]
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js.diff b/testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js.diff
deleted file mode 100644
index 3ab149c92c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/strictModeReservedWordInImportEqualDeclaration.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.strictModeReservedWordInImportEqualDeclaration.js
-+++ new.strictModeReservedWordInImportEqualDeclaration.js
-@@= skipped -6, +6 lines =@@
- //// [strictModeReservedWordInImportEqualDeclaration.js]
- "use strict";
- Object.defineProperty(exports, "__esModule", { value: true });
-+"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js b/testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js
index 1e234bc8b1..c88544a128 100644
--- a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js
+++ b/testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js
@@ -238,6 +238,7 @@ type UC = UA & UB;  // undefined
 
 
 //// [strictOptionalProperties1.js]
+"use strict";
 function f1(obj) {
     let a = obj.a; // string | undefined
     let b = obj.b; // string | undefined
diff --git a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js.diff b/testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js.diff
deleted file mode 100644
index 72ce9b595c..0000000000
--- a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.strictOptionalProperties1.js
-+++ new.strictOptionalProperties1.js
-@@= skipped -237, +237 lines =@@
-
-
- //// [strictOptionalProperties1.js]
--"use strict";
- function f1(obj) {
-     let a = obj.a; // string | undefined
-     let b = obj.b; // string | undefined
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js b/testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js
index faed3c3d7f..1daf28ba9e 100644
--- a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js
+++ b/testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js
@@ -8,6 +8,7 @@ type T2 = [(string | undefined)?] extends [string?] ? true : false;  // false
 
 
 //// [strictOptionalProperties2.js]
+"use strict";
 // Repro from #44567
 
 
diff --git a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js.diff b/testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js.diff
deleted file mode 100644
index 1f43d8fe3b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/strictOptionalProperties2.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.strictOptionalProperties2.js
-+++ new.strictOptionalProperties2.js
-@@= skipped -7, +7 lines =@@
-
-
- //// [strictOptionalProperties2.js]
--"use strict";
- // Repro from #44567
-
diff --git a/testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js b/testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js
index 65ea4cd3b8..cc4abc09c7 100644
--- a/testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js
+++ b/testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js
@@ -234,6 +234,7 @@ const f = (value: Union) => {
 
 
 //// [strictSubtypeAndNarrowing.js]
+"use strict";
 // Check that `any` is a strict supertype of `unknown`
 const a11 = [x11, x12];
 const a12 = [x12, x11];
diff --git a/testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js.diff b/testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js.diff
deleted file mode 100644
index a357bd50ad..0000000000
--- a/testdata/baselines/reference/submodule/compiler/strictSubtypeAndNarrowing.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.strictSubtypeAndNarrowing.js
-+++ new.strictSubtypeAndNarrowing.js
-@@= skipped -233, +233 lines =@@
-
-
- //// [strictSubtypeAndNarrowing.js]
--"use strict";
- // Check that `any` is a strict supertype of `unknown`
- const a11 = [x11, x12];
- const a12 = [x12, x11];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js b/testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js
index 8a29c66218..aade0d0d8c 100644
--- a/testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js
+++ b/testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js
@@ -19,6 +19,7 @@ function stringify4(anything: { toString?(): string } | undefined): string {
 
 
 //// [strictTypeofUnionNarrowing.js]
+"use strict";
 function stringify1(anything) {
     return typeof anything === "string" ? anything.toUpperCase() : "";
 }
diff --git a/testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js.diff b/testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js.diff
deleted file mode 100644
index 2abdd48d44..0000000000
--- a/testdata/baselines/reference/submodule/compiler/strictTypeofUnionNarrowing.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.strictTypeofUnionNarrowing.js
-+++ new.strictTypeofUnionNarrowing.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [strictTypeofUnionNarrowing.js]
--"use strict";
- function stringify1(anything) {
-     return typeof anything === "string" ? anything.toUpperCase() : "";
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js b/testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js
index 34e827db21..fae7c3e776 100644
--- a/testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js
+++ b/testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js
@@ -6,5 +6,6 @@ const y: Uppercase<string> = { foo: "bar" };
 
 
 //// [stringMappingAssignability.js]
+"use strict";
 const x = 42;
 const y = { foo: "bar" };
diff --git a/testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js.diff b/testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js.diff
deleted file mode 100644
index 97085a4edb..0000000000
--- a/testdata/baselines/reference/submodule/compiler/stringMappingAssignability.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.stringMappingAssignability.js
-+++ new.stringMappingAssignability.js
-@@= skipped -5, +5 lines =@@
-
-
- //// [stringMappingAssignability.js]
--"use strict";
- const x = 42;
- const y = { foo: "bar" };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js b/testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js
index 7c4894d69d..6ee8d698b4 100644
--- a/testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js
+++ b/testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js
@@ -35,10 +35,12 @@ const test9 = new C();
 
 
 //// [tile1.js]
+"use strict";
 class C {
     view(v) { return 0; }
 }
 const test8 = new C();
 //// [file1.js]
+"use strict";
 /** @type {ClassComponent<any>} */
 const test9 = new C();
diff --git a/testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js.diff b/testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js.diff
deleted file mode 100644
index 241e4ca1cf..0000000000
--- a/testdata/baselines/reference/submodule/compiler/subclassThisTypeAssignable02.js.diff
+++ /dev/null
@@ -1,15 +0,0 @@
---- old.subclassThisTypeAssignable02.js
-+++ new.subclassThisTypeAssignable02.js
-@@= skipped -34, +34 lines =@@
-
-
- //// [tile1.js]
--"use strict";
- class C {
-     view(v) { return 0; }
- }
- const test8 = new C();
- //// [file1.js]
--"use strict";
- /** @type {ClassComponent<any>} */
- const test9 = new C();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js b/testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js
index b29330ac35..32e1d9aef3 100644
--- a/testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js
+++ b/testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js
@@ -9,3 +9,4 @@ type Bar2<T extends Set<unknown[]>> = T
 
 
 //// [substitutionTypePassedToExtends.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js.diff b/testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js.diff
deleted file mode 100644
index 79b689d696..0000000000
--- a/testdata/baselines/reference/submodule/compiler/substitutionTypePassedToExtends.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.substitutionTypePassedToExtends.js
-+++ new.substitutionTypePassedToExtends.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [substitutionTypePassedToExtends.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js b/testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js
index 4c6924d769..3fd40e6b44 100644
--- a/testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js
+++ b/testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js
@@ -9,3 +9,4 @@ type R = Bug<{ a : any } | { b: any }>          // should be "a" | "b"
 
 
 //// [substitutionTypesCompareCorrectlyInRestrictiveInstances.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js.diff b/testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js.diff
deleted file mode 100644
index 5934256674..0000000000
--- a/testdata/baselines/reference/submodule/compiler/substitutionTypesCompareCorrectlyInRestrictiveInstances.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.substitutionTypesCompareCorrectlyInRestrictiveInstances.js
-+++ new.substitutionTypesCompareCorrectlyInRestrictiveInstances.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [substitutionTypesCompareCorrectlyInRestrictiveInstances.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js b/testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js
index 716b8ff27c..04671dfeaf 100644
--- a/testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js
@@ -22,6 +22,7 @@ const withoutBoundaryResult = withoutBoundary({
 
 
 //// [substitutionTypesInIndexedAccessTypes.js]
+"use strict";
 // Repro from #31086
 const boundaryResult = withBoundary({
     select: true,
diff --git a/testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js.diff b/testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js.diff
deleted file mode 100644
index 012b6eca39..0000000000
--- a/testdata/baselines/reference/submodule/compiler/substitutionTypesInIndexedAccessTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.substitutionTypesInIndexedAccessTypes.js
-+++ new.substitutionTypesInIndexedAccessTypes.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [substitutionTypesInIndexedAccessTypes.js]
--"use strict";
- // Repro from #31086
- const boundaryResult = withBoundary({
-     select: true,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js b/testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js
index 06e07f4360..49e28d4077 100644
--- a/testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js
+++ b/testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js
@@ -19,6 +19,7 @@ function getHashLength2<T extends { __tag__: unknown}>(hash: string & T): number
 
 
 //// [taggedPrimitiveNarrowing.js]
+"use strict";
 function getHashLength(hash) {
     if (typeof hash !== "string") {
         throw new Error("This doesn't look like a hash");
diff --git a/testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js.diff b/testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js.diff
deleted file mode 100644
index 64d441b5dc..0000000000
--- a/testdata/baselines/reference/submodule/compiler/taggedPrimitiveNarrowing.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.taggedPrimitiveNarrowing.js
-+++ new.taggedPrimitiveNarrowing.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [taggedPrimitiveNarrowing.js]
--"use strict";
- function getHashLength(hash) {
-     if (typeof hash !== "string") {
-         throw new Error("This doesn't look like a hash");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js b/testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js
index 66868ec7c8..15b9ffcd29 100644
--- a/testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js
@@ -31,6 +31,7 @@ type T41 = TupleOf<any, number>;
 
 
 //// [tailRecursiveConditionalTypes.js]
+"use strict";
 
 
 //// [tailRecursiveConditionalTypes.d.ts]
diff --git a/testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js.diff b/testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js.diff
deleted file mode 100644
index 7024ecd471..0000000000
--- a/testdata/baselines/reference/submodule/compiler/tailRecursiveConditionalTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.tailRecursiveConditionalTypes.js
-+++ new.tailRecursiveConditionalTypes.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [tailRecursiveConditionalTypes.js]
--"use strict";
-
-
- //// [tailRecursiveConditionalTypes.d.ts]
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js b/testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js
index 92965aafcb..aebf8dcfe6 100644
--- a/testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js
+++ b/testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js
@@ -19,6 +19,7 @@ const { Provider, useUsername, useAge, useStore } = createStore({
 
 
 //// [templateLiteralIntersection4.js]
+"use strict";
 const { Provider, useUsername, useAge, useStore } = createStore({
     username: "Aral",
     age: 31
diff --git a/testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js.diff b/testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js.diff
deleted file mode 100644
index d24b7db43b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/templateLiteralIntersection4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.templateLiteralIntersection4.js
-+++ new.templateLiteralIntersection4.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [templateLiteralIntersection4.js]
--"use strict";
- const { Provider, useUsername, useAge, useStore } = createStore({
-     username: "Aral",
-     age: 31
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js b/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js
index 5c8cd7d945..4969b600ab 100644
--- a/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js
+++ b/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js
@@ -7,6 +7,7 @@ f("x").foo;
 
 
 //// [templateLiteralsInTypes.js]
+"use strict";
 const f = (hdr, val) => `${hdr}:\t${val}\r\n`;
 f("x").foo;
 
diff --git a/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js.diff b/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js.diff
index 9a682e82ae..5445ee469c 100644
--- a/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/templateLiteralsInTypes.js.diff
@@ -1,12 +1,6 @@
 --- old.templateLiteralsInTypes.js
 +++ new.templateLiteralsInTypes.js
-@@= skipped -6, +6 lines =@@
-
-
- //// [templateLiteralsInTypes.js]
--"use strict";
- const f = (hdr, val) => `${hdr}:\t${val}\r\n`;
- f("x").foo;
+@@= skipped -12, +12 lines =@@
 
 
  //// [templateLiteralsInTypes.d.ts]
diff --git a/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js b/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js
index 21f9fb5266..67ef260dcd 100644
--- a/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js
+++ b/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js
@@ -21,6 +21,7 @@ const y = x.method(); // usage flags `method` in `B` as circular and marks `y` a
 
 
 //// [thisConditionalOnMethodReturnOfGenericInstance.js]
+"use strict";
 class A {
     unmeasurableUsage;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js.diff b/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js.diff
index 8117453e11..bf435290f6 100644
--- a/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/thisConditionalOnMethodReturnOfGenericInstance.js.diff
@@ -1,16 +1,14 @@
 --- old.thisConditionalOnMethodReturnOfGenericInstance.js
 +++ new.thisConditionalOnMethodReturnOfGenericInstance.js
-@@= skipped -20, +20 lines =@@
-
-
+@@= skipped -22, +22 lines =@@
  //// [thisConditionalOnMethodReturnOfGenericInstance.js]
--"use strict";
+ "use strict";
  class A {
 +    unmeasurableUsage;
  }
  class B extends A {
      method() {
-@@= skipped -9, +9 lines =@@
+@@= skipped -7, +8 lines =@@
      }
  }
  class C extends B {
diff --git a/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js b/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js
index d01082ef88..8aaa979a40 100644
--- a/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js
+++ b/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js
@@ -25,6 +25,7 @@ class CoachMarkAnchorDecorator {
 
 
 //// [thisIndexOnExistingReadonlyFieldIsNotNever.js]
+"use strict";
 class CoachMarkAnchorDecorator {
     decorateComponent(anchor) {
         return class CoachMarkAnchor extends Component {
diff --git a/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js.diff b/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js.diff
index 22863572b3..96d343ef7b 100644
--- a/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/thisIndexOnExistingReadonlyFieldIsNotNever.js.diff
@@ -1,10 +1,6 @@
 --- old.thisIndexOnExistingReadonlyFieldIsNotNever.js
 +++ new.thisIndexOnExistingReadonlyFieldIsNotNever.js
-@@= skipped -24, +24 lines =@@
-
-
- //// [thisIndexOnExistingReadonlyFieldIsNotNever.js]
--"use strict";
+@@= skipped -28, +28 lines =@@
  class CoachMarkAnchorDecorator {
      decorateComponent(anchor) {
          return class CoachMarkAnchor extends Component {
diff --git a/testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js b/testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js
index b8dfc20d4d..d13fe894d3 100644
--- a/testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js
+++ b/testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js
@@ -17,6 +17,7 @@ const foo3 = {
 
 
 //// [thisPredicateInObjectLiteral.js]
+"use strict";
 // Should be OK
 const foo2 = {
     isNumber() {
diff --git a/testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js.diff b/testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js.diff
deleted file mode 100644
index 4f67470678..0000000000
--- a/testdata/baselines/reference/submodule/compiler/thisPredicateInObjectLiteral.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.thisPredicateInObjectLiteral.js
-+++ new.thisPredicateInObjectLiteral.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [thisPredicateInObjectLiteral.js]
--"use strict";
- // Should be OK
- const foo2 = {
-     isNumber() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js b/testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js
index 87b8d2417c..187ffe6540 100644
--- a/testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js
+++ b/testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js
@@ -12,6 +12,7 @@ class C {
 
 
 //// [thisShadowingErrorSpans.js]
+"use strict";
 class C {
     m() {
         this.m();
diff --git a/testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js.diff b/testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js.diff
deleted file mode 100644
index 0b3200133f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/thisShadowingErrorSpans.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.thisShadowingErrorSpans.js
-+++ new.thisShadowingErrorSpans.js
-@@= skipped -11, +11 lines =@@
-
-
- //// [thisShadowingErrorSpans.js]
--"use strict";
- class C {
-     m() {
-         this.m();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js b/testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js
index 11f206024b..80e895477a 100644
--- a/testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js
+++ b/testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js
@@ -332,6 +332,7 @@ function f21() {
 
 
 //// [tryCatchFinallyControlFlow.js]
+"use strict";
 // Repro from #34797
 function f1() {
     let a = null;
diff --git a/testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js.diff b/testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js.diff
deleted file mode 100644
index 42cb3614bd..0000000000
--- a/testdata/baselines/reference/submodule/compiler/tryCatchFinallyControlFlow.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.tryCatchFinallyControlFlow.js
-+++ new.tryCatchFinallyControlFlow.js
-@@= skipped -331, +331 lines =@@
-
-
- //// [tryCatchFinallyControlFlow.js]
--"use strict";
- // Repro from #34797
- function f1() {
-     let a = null;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js b/testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js
index 83bede6793..0e56269527 100644
--- a/testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js
+++ b/testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js
@@ -19,6 +19,7 @@ const b = <Button></Button>
 
 
 //// [tsxAttributesHasInferrableIndex.js]
+"use strict";
 function createElement(name, attributes, ...contents) {
     return name;
 }
diff --git a/testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js.diff b/testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js.diff
deleted file mode 100644
index 67db15f55f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/tsxAttributesHasInferrableIndex.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.tsxAttributesHasInferrableIndex.js
-+++ new.tsxAttributesHasInferrableIndex.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [tsxAttributesHasInferrableIndex.js]
--"use strict";
- function createElement(name, attributes, ...contents) {
-     return name;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js b/testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js
index f3b7be40a0..0a9b71400f 100644
--- a/testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js
+++ b/testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js
@@ -27,6 +27,7 @@ h2([[]] as [void[]]); // T: void
 
 
 //// [tupleTypeInference2.js]
+"use strict";
 // Repro from #22564
 f([undefined, '']); // T: never
 f([undefined, '']); // T: void
diff --git a/testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js.diff b/testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js.diff
deleted file mode 100644
index 95664bcfcf..0000000000
--- a/testdata/baselines/reference/submodule/compiler/tupleTypeInference2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.tupleTypeInference2.js
-+++ new.tupleTypeInference2.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [tupleTypeInference2.js]
--"use strict";
- // Repro from #22564
- f([undefined, '']); // T: never
- f([undefined, '']); // T: void
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js
index e53f8db6d1..e364ad2e33 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js
@@ -11,6 +11,7 @@ const bar: { [id: string]: number } = {};
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty10.js]
+"use strict";
 const bar = {};
 (foo) => {
     bar[id]++;
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js.diff
deleted file mode 100644
index e2dec868cb..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty10.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty10.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty10.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty10.js]
--"use strict";
- const bar = {};
- (foo) => {
-     bar[id]++;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js
index ea918e86ef..78f250086e 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js
@@ -11,6 +11,7 @@ if (m[E.A] !== null) {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty11.js]
+"use strict";
 var E;
 (function (E) {
     E[E["A"] = 0] = "A";
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js.diff
deleted file mode 100644
index b77df56894..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty11.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty11.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty11.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty11.js]
--"use strict";
- var E;
- (function (E) {
-     E[E["A"] = 0] = "A";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js
index 7392295625..dfb7ead048 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js
@@ -14,6 +14,7 @@ if (m[E.A] !== null) {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty12.js]
+"use strict";
 var E;
 (function (E) {
     E["A"] = "A";
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js.diff
deleted file mode 100644
index 1d417377f6..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty12.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty12.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty12.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty12.js]
--"use strict";
- var E;
- (function (E) {
-     E["A"] = "A";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js
index fb347a5436..1321935c08 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js
@@ -11,6 +11,7 @@ if (foo[key]) {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty2.js]
+"use strict";
 const foo = {};
 const key = 'key';
 if (foo[key]) {
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js.diff
deleted file mode 100644
index b86b817e4d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty2.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty2.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty2.js]
--"use strict";
- const foo = {};
- const key = 'key';
- if (foo[key]) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js
index 0e702e6589..ae644711af 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js
@@ -12,6 +12,7 @@ if (foo !== undefined && foo[index] !== undefined && foo[index] >= 0) {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty3.js]
+"use strict";
 const foo = [1, 2, 3];
 const index = 1;
 if (foo !== undefined && foo[index] !== undefined && foo[index] >= 0) {
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js.diff
deleted file mode 100644
index 7fdf65ba76..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty3.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty3.js
-@@= skipped -11, +11 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty3.js]
--"use strict";
- const foo = [1, 2, 3];
- const index = 1;
- if (foo !== undefined && foo[index] !== undefined && foo[index] >= 0) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js
index 63cd71606a..7c5c4816f8 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js
@@ -17,6 +17,7 @@ class Foo {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty4.js]
+"use strict";
 class Foo {
     x;
     constructor() {
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js.diff
index e5df4d3892..eafbfee9d3 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty4.js.diff
@@ -1,10 +1,8 @@
 --- old.typeGuardNarrowsIndexedAccessOfKnownProperty4.js
 +++ new.typeGuardNarrowsIndexedAccessOfKnownProperty4.js
-@@= skipped -16, +16 lines =@@
-
-
+@@= skipped -18, +18 lines =@@
  //// [typeGuardNarrowsIndexedAccessOfKnownProperty4.js]
--"use strict";
+ "use strict";
  class Foo {
 +    x;
      constructor() {
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js
index 9c651d98a1..0098d1a0d8 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js
@@ -24,6 +24,7 @@ if (c[cIndex].x) {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty5.js]
+"use strict";
 const a = {};
 const aIndex = "key";
 if (a[aIndex] && a[aIndex].x) {
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js.diff
deleted file mode 100644
index 161b23974d..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty5.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty5.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty5.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty5.js]
--"use strict";
- const a = {};
- const aIndex = "key";
- if (a[aIndex] && a[aIndex].x) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js
index 061cdfc5aa..22cabf24c2 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js
@@ -24,6 +24,7 @@ if (c[cIndex].x) {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty6.js]
+"use strict";
 const a = {};
 if (a[aIndex] && a[aIndex].x) {
     a[aIndex].x; // number
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js.diff
deleted file mode 100644
index 4ace4a864a..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty6.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty6.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty6.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty6.js]
--"use strict";
- const a = {};
- if (a[aIndex] && a[aIndex].x) {
-     a[aIndex].x; // number
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js
index e58c477572..e4d9063424 100644
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js
+++ b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js
@@ -15,6 +15,7 @@ class C1 {
 
 
 //// [typeGuardNarrowsIndexedAccessOfKnownProperty9.js]
+"use strict";
 class C1 {
     a = "a"; // ok
     b = "b"; // ok
diff --git a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js.diff b/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js.diff
deleted file mode 100644
index 6768164d4b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeGuardNarrowsIndexedAccessOfKnownProperty9.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeGuardNarrowsIndexedAccessOfKnownProperty9.js
-+++ new.typeGuardNarrowsIndexedAccessOfKnownProperty9.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [typeGuardNarrowsIndexedAccessOfKnownProperty9.js]
--"use strict";
- class C1 {
-     a = "a"; // ok
-     b = "b"; // ok
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js b/testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js
index 95971eab9b..52245eabf2 100644
--- a/testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js
+++ b/testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js
@@ -25,6 +25,7 @@ example(42, (foo, bar) => ({
 
 
 //// [typeInferenceCacheInvalidation.js]
+"use strict";
 // Repro from #32230
 example(42, (foo, bar) => ({
     t: () => {
diff --git a/testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js.diff b/testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js.diff
deleted file mode 100644
index c33aa07752..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeInferenceCacheInvalidation.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeInferenceCacheInvalidation.js
-+++ new.typeInferenceCacheInvalidation.js
-@@= skipped -24, +24 lines =@@
-
-
- //// [typeInferenceCacheInvalidation.js]
--"use strict";
- // Repro from #32230
- example(42, (foo, bar) => ({
-     t: () => {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js b/testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js
index 44b139e644..f636aafa95 100644
--- a/testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js
+++ b/testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js
@@ -34,6 +34,7 @@ function f4() {
 
 
 //// [typeInterfaceDeclarationsInBlockStatements1.js]
+"use strict";
 // https://github.com/microsoft/TypeScript/issues/60175
 function f1() {
     if (true)
diff --git a/testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js.diff b/testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js.diff
deleted file mode 100644
index 6e00dc9aef..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeInterfaceDeclarationsInBlockStatements1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeInterfaceDeclarationsInBlockStatements1.js
-+++ new.typeInterfaceDeclarationsInBlockStatements1.js
-@@= skipped -33, +33 lines =@@
-
-
- //// [typeInterfaceDeclarationsInBlockStatements1.js]
--"use strict";
- // https://github.com/microsoft/TypeScript/issues/60175
- function f1() {
-     if (true)
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeParameterLeak.js b/testdata/baselines/reference/submodule/compiler/typeParameterLeak.js
index 634e34ed50..3582f80d2a 100644
--- a/testdata/baselines/reference/submodule/compiler/typeParameterLeak.js
+++ b/testdata/baselines/reference/submodule/compiler/typeParameterLeak.js
@@ -22,6 +22,7 @@ if (b) {
 
 
 //// [typeParameterLeak.js]
+"use strict";
 // Repro from #35655
 var _a;
 const b = (_a = f({ x: "", y: "" })) === null || _a === void 0 ? void 0 : _a.getBox();
diff --git a/testdata/baselines/reference/submodule/compiler/typeParameterLeak.js.diff b/testdata/baselines/reference/submodule/compiler/typeParameterLeak.js.diff
deleted file mode 100644
index eb4ac1eac5..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typeParameterLeak.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeParameterLeak.js
-+++ new.typeParameterLeak.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [typeParameterLeak.js]
--"use strict";
- // Repro from #35655
- var _a;
- const b = (_a = f({ x: "", y: "" })) === null || _a === void 0 ? void 0 : _a.getBox();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js b/testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js
index 60676ca0ce..b1f02cc3ed 100644
--- a/testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js
+++ b/testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js
@@ -18,6 +18,7 @@ const foundAdmins = admins.filter(isDefined);  // "admin"[]
 
 
 //// [typePredicateTopLevelTypeParameter.js]
+"use strict";
 // Repro from #51980
 function getPermissions(user) {
     if (user === 'Jack')
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js.diff b/testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js.diff
deleted file mode 100644
index 082a1df7a4..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typePredicateTopLevelTypeParameter.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typePredicateTopLevelTypeParameter.js
-+++ new.typePredicateTopLevelTypeParameter.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [typePredicateTopLevelTypeParameter.js]
--"use strict";
- // Repro from #51980
- function getPermissions(user) {
-     if (user === 'Jack')
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js b/testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js
index fc07dd5a1d..5e68d9c70a 100644
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js
+++ b/testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js
@@ -18,6 +18,7 @@ if (isOneOf(kind, ['apple', 'banana'] as const)) {
 }
 
 //// [typePredicatesCanNarrowByDiscriminant.js]
+"use strict";
 if (isOneOf(fruit.kind, ['apple', 'banana'])) {
     fruit.kind;
     fruit;
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js.diff b/testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js.diff
deleted file mode 100644
index 594e187d91..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesCanNarrowByDiscriminant.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typePredicatesCanNarrowByDiscriminant.js
-+++ new.typePredicatesCanNarrowByDiscriminant.js
-@@= skipped -17, +17 lines =@@
- }
-
- //// [typePredicatesCanNarrowByDiscriminant.js]
--"use strict";
- if (isOneOf(fruit.kind, ['apple', 'banana'])) {
-     fruit.kind;
-     fruit;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js
index 2f113cff0c..3f36b6c563 100644
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js
+++ b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js
@@ -22,6 +22,7 @@ isNotNull(x?.y?.z) ? title(x.y.z) : null; // should not error
 
 
 //// [typePredicatesOptionalChaining1.js]
+"use strict";
 var _a;
 const x = {
     y: {},
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js.diff b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js.diff
deleted file mode 100644
index b4904b9f68..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typePredicatesOptionalChaining1.js
-+++ new.typePredicatesOptionalChaining1.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [typePredicatesOptionalChaining1.js]
--"use strict";
- var _a;
- const x = {
-     y: {},
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js
index 590c7978bf..488d823910 100644
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js
+++ b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js
@@ -17,6 +17,7 @@ const getName2 = (person?: Person): string => {
 
 
 //// [typePredicatesOptionalChaining2.js]
+"use strict";
 const getName1 = (person) => {
     return typeof (person === null || person === void 0 ? void 0 : person.name) === 'string' ? person === null || person === void 0 ? void 0 : person.name : '';
 };
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js.diff b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js.diff
deleted file mode 100644
index 736f53060e..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typePredicatesOptionalChaining2.js
-+++ new.typePredicatesOptionalChaining2.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [typePredicatesOptionalChaining2.js]
--"use strict";
- const getName1 = (person) => {
-     return typeof (person === null || person === void 0 ? void 0 : person.name) === 'string' ? person === null || person === void 0 ? void 0 : person.name : '';
- };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js
index 49d1588bb0..7e5613193b 100644
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js
+++ b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js
@@ -28,6 +28,7 @@ function getBreedSizeWithFunction(animal: Animal): string | undefined {
 
 
 //// [typePredicatesOptionalChaining3.js]
+"use strict";
 function getBreedSizeWithoutFunction(animal) {
     var _a;
     if (((_a = animal === null || animal === void 0 ? void 0 : animal.breed) === null || _a === void 0 ? void 0 : _a.size) != null) {
diff --git a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js.diff b/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js.diff
deleted file mode 100644
index 7e123bd9a0..0000000000
--- a/testdata/baselines/reference/submodule/compiler/typePredicatesOptionalChaining3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typePredicatesOptionalChaining3.js
-+++ new.typePredicatesOptionalChaining3.js
-@@= skipped -27, +27 lines =@@
-
-
- //// [typePredicatesOptionalChaining3.js]
--"use strict";
- function getBreedSizeWithoutFunction(animal) {
-     var _a;
-     if (((_a = animal === null || animal === void 0 ? void 0 : animal.breed) === null || _a === void 0 ? void 0 : _a.size) != null) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js b/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js
index 258c49c441..4eb7ecd2b3 100644
--- a/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js
+++ b/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js
@@ -93,6 +93,7 @@ function f6<T extends string | (new () => {})>(a: T) {
 
 
 //// [typeVariableTypeGuards.js]
+"use strict";
 // Repro from #14091
 class A {
     props;
diff --git a/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js.diff b/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js.diff
index 1e8384307e..f27944a6c2 100644
--- a/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js.diff
+++ b/testdata/baselines/reference/submodule/compiler/typeVariableTypeGuards.js.diff
@@ -1,17 +1,14 @@
 --- old.typeVariableTypeGuards.js
 +++ new.typeVariableTypeGuards.js
-@@= skipped -92, +92 lines =@@
-
-
- //// [typeVariableTypeGuards.js]
--"use strict";
+@@= skipped -95, +95 lines =@@
+ "use strict";
  // Repro from #14091
  class A {
 +    props;
      constructor(props) {
          this.props = props;
      }
-@@= skipped -11, +11 lines =@@
+@@= skipped -8, +9 lines =@@
      }
  }
  class Monkey {
diff --git a/testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js b/testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js
index cbb85761cd..28b68ee250 100644
--- a/testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js
+++ b/testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js
@@ -23,5 +23,6 @@ React.foo;
 React.foo;
 export {};
 //// [emits.js]
+"use strict";
 console.log("hello");
 React.foo;
diff --git a/testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js.diff b/testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js.diff
deleted file mode 100644
index bcbeab8db7..0000000000
--- a/testdata/baselines/reference/submodule/compiler/umdGlobalAugmentationNoCrash.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.umdGlobalAugmentationNoCrash.js
-+++ new.umdGlobalAugmentationNoCrash.js
-@@= skipped -22, +22 lines =@@
- React.foo;
- export {};
- //// [emits.js]
--"use strict";
- console.log("hello");
- React.foo;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js b/testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js
index 588e46dcee..ac165ac0a8 100644
--- a/testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js
+++ b/testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js
@@ -27,5 +27,6 @@ React.createRef;
 React.createRef;
 export {};
 //// [emits.js]
+"use strict";
 console.log("hello");
 React.createRef;
diff --git a/testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js.diff b/testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js.diff
deleted file mode 100644
index c666e525d6..0000000000
--- a/testdata/baselines/reference/submodule/compiler/umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js
-+++ new.umdNamespaceMergedWithGlobalAugmentationIsNotCircular.js
-@@= skipped -26, +26 lines =@@
- React.createRef;
- export {};
- //// [emits.js]
--"use strict";
- console.log("hello");
- React.createRef;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js b/testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js
index 93b9b97d22..e6042e77fc 100644
--- a/testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js
+++ b/testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js
@@ -10,6 +10,7 @@ function foo<T>() {
 
 
 //// [undefinedAssignableToGenericMappedIntersection.js]
+"use strict";
 function foo() {
     let obj;
     let x;
diff --git a/testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js.diff b/testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js.diff
deleted file mode 100644
index bd54964abc..0000000000
--- a/testdata/baselines/reference/submodule/compiler/undefinedAssignableToGenericMappedIntersection.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.undefinedAssignableToGenericMappedIntersection.js
-+++ new.undefinedAssignableToGenericMappedIntersection.js
-@@= skipped -9, +9 lines =@@
-
-
- //// [undefinedAssignableToGenericMappedIntersection.js]
--"use strict";
- function foo() {
-     let obj;
-     let x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js b/testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js
index 650c039802..42786f2e27 100644
--- a/testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js
+++ b/testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js
@@ -25,6 +25,7 @@ const foo: Union = {
 };
 
 //// [unionErrorMessageOnMatchingDiscriminant.js]
+"use strict";
 // error
 const foo = {
     type: 'a',
diff --git a/testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js.diff b/testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js.diff
deleted file mode 100644
index 1301b80bbf..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionErrorMessageOnMatchingDiscriminant.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionErrorMessageOnMatchingDiscriminant.js
-+++ new.unionErrorMessageOnMatchingDiscriminant.js
-@@= skipped -24, +24 lines =@@
- };
-
- //// [unionErrorMessageOnMatchingDiscriminant.js]
--"use strict";
- // error
- const foo = {
-     type: 'a',
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js b/testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js
index 7ed3200ce0..311193211c 100644
--- a/testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js
+++ b/testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js
@@ -18,4 +18,5 @@ ab = {...a, y: (null as any as string | undefined)}; // Should be allowed, since
 
 
 //// [unionExcessPropsWithPartialMember.js]
+"use strict";
 ab = Object.assign(Object.assign({}, a), { y: null }); // Should be allowed, since `y` is missing on `A`
diff --git a/testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js.diff b/testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js.diff
deleted file mode 100644
index 6b30d63783..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionExcessPropsWithPartialMember.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.unionExcessPropsWithPartialMember.js
-+++ new.unionExcessPropsWithPartialMember.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [unionExcessPropsWithPartialMember.js]
--"use strict";
- ab = Object.assign(Object.assign({}, a), { y: null }); // Should be allowed, since `y` is missing on `A`
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js b/testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js
index 14e0db9ac4..327d64952a 100644
--- a/testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js
+++ b/testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js
@@ -80,6 +80,7 @@ a.doThing().then((result: Bar | Baz) => {
 
 
 //// [unionOfClassCalls.js]
+"use strict";
 switch (tmp.get('t')) {
     case 'A': break;
     case 'B': break;
diff --git a/testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js.diff b/testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js.diff
deleted file mode 100644
index 55cf8f7199..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionOfClassCalls.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionOfClassCalls.js
-+++ new.unionOfClassCalls.js
-@@= skipped -79, +79 lines =@@
-
-
- //// [unionOfClassCalls.js]
--"use strict";
- switch (tmp.get('t')) {
-     case 'A': break;
-     case 'B': break;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js b/testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js
index 55546c84db..888d001655 100644
--- a/testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js
+++ b/testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js
@@ -17,6 +17,7 @@ function bar(x: Interface<Enum.A | Enum.B> | Interface<Enum.C>) {
 
 
 //// [unionOfEnumInference.js]
+"use strict";
 // Repro from #42932
 var Enum;
 (function (Enum) {
diff --git a/testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js.diff b/testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js.diff
deleted file mode 100644
index d5483d2e56..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionOfEnumInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionOfEnumInference.js
-+++ new.unionOfEnumInference.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [unionOfEnumInference.js]
--"use strict";
- // Repro from #42932
- var Enum;
- (function (Enum) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js b/testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js
index cb229487ce..f2c54cd740 100644
--- a/testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js
+++ b/testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js
@@ -17,6 +17,7 @@ function run(options: { something?(b?: string): void }) {
 
 
 //// [unionReductionMutualSubtypes.js]
+"use strict";
 // Repro from #35414
 const k = { something() { } };
 function run(options) {
diff --git a/testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js.diff b/testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js.diff
deleted file mode 100644
index d436a9641f..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionReductionMutualSubtypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionReductionMutualSubtypes.js
-+++ new.unionReductionMutualSubtypes.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [unionReductionMutualSubtypes.js]
--"use strict";
- // Repro from #35414
- const k = { something() { } };
- function run(options) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js b/testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js
index 60e00bb861..6dc2a2b3da 100644
--- a/testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js
+++ b/testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js
@@ -5,4 +5,5 @@ const item: { foo?: undefined } | { foo: number } = null as any as { foo?: numbe
 
 
 //// [unionRelationshipCheckPasses.js]
+"use strict";
 const item = null;
diff --git a/testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js.diff b/testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js.diff
deleted file mode 100644
index 2562dfc68b..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionRelationshipCheckPasses.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.unionRelationshipCheckPasses.js
-+++ new.unionRelationshipCheckPasses.js
-@@= skipped -4, +4 lines =@@
-
-
- //// [unionRelationshipCheckPasses.js]
--"use strict";
- const item = null;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js b/testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js
index eadcb28f63..682af9885f 100644
--- a/testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js
+++ b/testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js
@@ -15,6 +15,7 @@ function x<T>(ctor: {
 
 
 //// [unionSignaturesWithThisParameter.js]
+"use strict";
 // Repro from #20802
 function x(ctor, t) {
     new ctor(t);
diff --git a/testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js.diff b/testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js.diff
deleted file mode 100644
index f747d23383..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionSignaturesWithThisParameter.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionSignaturesWithThisParameter.js
-+++ new.unionSignaturesWithThisParameter.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [unionSignaturesWithThisParameter.js]
--"use strict";
- // Repro from #20802
- function x(ctor, t) {
-     new ctor(t);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js b/testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js
index 72653f666e..de536b6af7 100644
--- a/testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js
+++ b/testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js
@@ -6013,6 +6013,7 @@ let b = [
 
 
 //// [unionSubtypeReductionErrors.js]
+"use strict";
 let a = [
     0,
     1,
diff --git a/testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js.diff b/testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js.diff
deleted file mode 100644
index b8a3bd9e23..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionSubtypeReductionErrors.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionSubtypeReductionErrors.js
-+++ new.unionSubtypeReductionErrors.js
-@@= skipped -6012, +6012 lines =@@
-
-
- //// [unionSubtypeReductionErrors.js]
--"use strict";
- let a = [
-     0,
-     1,
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js b/testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js
index 921e290453..a40c556de1 100644
--- a/testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js
+++ b/testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js
@@ -11,6 +11,7 @@ f({
 });
 
 //// [unionTypeWithIndexAndMethodSignature.js]
+"use strict";
 f({
     m(x) { },
 });
diff --git a/testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js.diff b/testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js.diff
deleted file mode 100644
index a276f0ab59..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unionTypeWithIndexAndMethodSignature.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionTypeWithIndexAndMethodSignature.js
-+++ new.unionTypeWithIndexAndMethodSignature.js
-@@= skipped -10, +10 lines =@@
- });
-
- //// [unionTypeWithIndexAndMethodSignature.js]
--"use strict";
- f({
-     m(x) { },
- });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js b/testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js
index cf0c2c208e..284057c916 100644
--- a/testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js
+++ b/testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js
@@ -12,6 +12,7 @@ let z = x
 z == y // error
 
 //// [index.js]
+"use strict";
 /** @type {unique symbol} */
 const x = Symbol();
 /** @type {unique symbol} */
diff --git a/testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js.diff b/testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js.diff
deleted file mode 100644
index 7a51c74004..0000000000
--- a/testdata/baselines/reference/submodule/compiler/uniqueSymbolJs2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.uniqueSymbolJs2.js
-+++ new.uniqueSymbolJs2.js
-@@= skipped -11, +11 lines =@@
- z == y // error
-
- //// [index.js]
--"use strict";
- /** @type {unique symbol} */
- const x = Symbol();
- /** @type {unique symbol} */
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js b/testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js
index 4e05cef004..4de88e9103 100644
--- a/testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js
+++ b/testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js
@@ -9,6 +9,7 @@ let t2: (...args: []) => unknown[] = s;
 
 
 //// [unmatchedParameterPositions.js]
+"use strict";
 // Repros from #40251
 let t1 = s;
 let t2 = s;
diff --git a/testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js.diff b/testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js.diff
deleted file mode 100644
index 49931e0146..0000000000
--- a/testdata/baselines/reference/submodule/compiler/unmatchedParameterPositions.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unmatchedParameterPositions.js
-+++ new.unmatchedParameterPositions.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [unmatchedParameterPositions.js]
--"use strict";
- // Repros from #40251
- let t1 = s;
- let t2 = s;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js
index 088ad066b6..82d550f5d7 100644
--- a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js
+++ b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js
@@ -89,6 +89,7 @@ function func5() {
 
 
 //// [unreachableDeclarations.js]
+"use strict";
 function func1() {
     aFunc();
     console.log(EnumA.Value);
diff --git a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js.diff b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js.diff
index 2a4fb1717f..a87f12aacc 100644
--- a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js.diff
+++ b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=false).js.diff
@@ -1,14 +1,6 @@
 --- old.unreachableDeclarations(preserveconstenums=false).js
 +++ new.unreachableDeclarations(preserveconstenums=false).js
-@@= skipped -88, +88 lines =@@
-
-
- //// [unreachableDeclarations.js]
--"use strict";
- function func1() {
-     aFunc();
-     console.log(EnumA.Value);
-@@= skipped -43, +42 lines =@@
+@@= skipped -131, +131 lines =@@
          console.log(ClassA.Value);
      }
      class ClassA {
diff --git a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js
index 7a1a4b028f..805d163fc4 100644
--- a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js
+++ b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js
@@ -89,6 +89,7 @@ function func5() {
 
 
 //// [unreachableDeclarations.js]
+"use strict";
 function func1() {
     aFunc();
     console.log(EnumA.Value);
diff --git a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js.diff b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js.diff
index d6787bfb54..86d2cfb72a 100644
--- a/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js.diff
+++ b/testdata/baselines/reference/submodule/compiler/unreachableDeclarations(preserveconstenums=true).js.diff
@@ -1,14 +1,6 @@
 --- old.unreachableDeclarations(preserveconstenums=true).js
 +++ new.unreachableDeclarations(preserveconstenums=true).js
-@@= skipped -88, +88 lines =@@
-
-
- //// [unreachableDeclarations.js]
--"use strict";
- function func1() {
-     aFunc();
-     console.log(EnumA.Value);
-@@= skipped -51, +50 lines =@@
+@@= skipped -139, +139 lines =@@
          console.log(ClassA.Value);
      }
      class ClassA {
diff --git a/testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js b/testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js
index 87b1176659..3911807168 100644
--- a/testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js
+++ b/testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js
@@ -31,6 +31,7 @@ cd = ca;  // Error
 
 
 //// [varianceAnnotationValidation.js]
+"use strict";
 // Repro from #49607
 ;
 class Dog {
diff --git a/testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js.diff b/testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js.diff
deleted file mode 100644
index cd43e2bd12..0000000000
--- a/testdata/baselines/reference/submodule/compiler/varianceAnnotationValidation.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.varianceAnnotationValidation.js
-+++ new.varianceAnnotationValidation.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [varianceAnnotationValidation.js]
--"use strict";
- // Repro from #49607
- ;
- class Dog {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/varianceMeasurement.js b/testdata/baselines/reference/submodule/compiler/varianceMeasurement.js
index 6f98f053cb..21c75f6b79 100644
--- a/testdata/baselines/reference/submodule/compiler/varianceMeasurement.js
+++ b/testdata/baselines/reference/submodule/compiler/varianceMeasurement.js
@@ -79,6 +79,7 @@ const c1: C<unknown, string> = new C<unknown, number>();  // Error
 
 
 //// [varianceMeasurement.js]
+"use strict";
 // The type below should be invariant in T but is measured as covariant because
 // we don't analyze recursive references.
 const f11 = f10;
diff --git a/testdata/baselines/reference/submodule/compiler/varianceMeasurement.js.diff b/testdata/baselines/reference/submodule/compiler/varianceMeasurement.js.diff
deleted file mode 100644
index 1b4843b5ca..0000000000
--- a/testdata/baselines/reference/submodule/compiler/varianceMeasurement.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.varianceMeasurement.js
-+++ new.varianceMeasurement.js
-@@= skipped -78, +78 lines =@@
-
-
- //// [varianceMeasurement.js]
--"use strict";
- // The type below should be invariant in T but is measured as covariant because
- // we don't analyze recursive references.
- const f11 = f10;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/voidIsInitialized.js b/testdata/baselines/reference/submodule/compiler/voidIsInitialized.js
index 465d85ad7f..022b7280b1 100644
--- a/testdata/baselines/reference/submodule/compiler/voidIsInitialized.js
+++ b/testdata/baselines/reference/submodule/compiler/voidIsInitialized.js
@@ -14,6 +14,7 @@ if(typeof y !== "undefined") {
 
 
 //// [voidIsInitialized.js]
+"use strict";
 const x = undefined;
 const y = undefined;
 if (typeof x === "undefined") {
diff --git a/testdata/baselines/reference/submodule/compiler/voidIsInitialized.js.diff b/testdata/baselines/reference/submodule/compiler/voidIsInitialized.js.diff
deleted file mode 100644
index 215b4eb6ce..0000000000
--- a/testdata/baselines/reference/submodule/compiler/voidIsInitialized.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.voidIsInitialized.js
-+++ new.voidIsInitialized.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [voidIsInitialized.js]
--"use strict";
- const x = undefined;
- const y = undefined;
- if (typeof x === "undefined") {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js b/testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js
index 7842d257ca..1d355ea668 100644
--- a/testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js
+++ b/testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js
@@ -15,6 +15,7 @@ if (isDefined(foo)) {
 
 
 //// [voidUndefinedReduction.js]
+"use strict";
 // Repro from #42786
 function isDefined(value) {
     return value !== undefined && value !== null;
diff --git a/testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js.diff b/testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js.diff
deleted file mode 100644
index 71f2274d32..0000000000
--- a/testdata/baselines/reference/submodule/compiler/voidUndefinedReduction.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.voidUndefinedReduction.js
-+++ new.voidUndefinedReduction.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [voidUndefinedReduction.js]
--"use strict";
- // Repro from #42786
- function isDefined(value) {
-     return value !== undefined && value !== null;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js b/testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js
index 202b83f3b3..ca12d1886c 100644
--- a/testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js
+++ b/testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js
@@ -33,6 +33,7 @@ const h = (arg: PrimitivesAndWeakTypes) => {
 
 
 //// [weakTypeAndPrimitiveNarrowing.js]
+"use strict";
 const g = (arg) => {
     if (arg === 'A') {
         arg;
diff --git a/testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js.diff b/testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js.diff
deleted file mode 100644
index e2428c2b36..0000000000
--- a/testdata/baselines/reference/submodule/compiler/weakTypeAndPrimitiveNarrowing.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.weakTypeAndPrimitiveNarrowing.js
-+++ new.weakTypeAndPrimitiveNarrowing.js
-@@= skipped -32, +32 lines =@@
-
-
- //// [weakTypeAndPrimitiveNarrowing.js]
--"use strict";
- const g = (arg) => {
-     if (arg === 'A') {
-         arg;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js b/testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js
index 2ed500cb34..20bc62f280 100644
--- a/testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js
+++ b/testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js
@@ -7,6 +7,7 @@ abstract class C {
 
 
 //// [abstractPropertyInitializer.js]
+"use strict";
 class C {
 }
 
diff --git a/testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js.diff b/testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js.diff
deleted file mode 100644
index c267c64054..0000000000
--- a/testdata/baselines/reference/submodule/conformance/abstractPropertyInitializer.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.abstractPropertyInitializer.js
-+++ new.abstractPropertyInitializer.js
-@@= skipped -6, +6 lines =@@
-
-
- //// [abstractPropertyInitializer.js]
--"use strict";
- class C {
- }
diff --git a/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js b/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js
index af9444700d..a64aca0bfc 100644
--- a/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js
+++ b/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js
@@ -261,6 +261,7 @@ function testFunctionThisParameter2(
 
 
 //// [assertionTypePredicates1.js]
+"use strict";
 const assert = value => { };
 function f01(x) {
     if (!!true) {
diff --git a/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js.diff b/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js.diff
index 1e6390dc46..6ad7f8481a 100644
--- a/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/assertionTypePredicates1.js.diff
@@ -1,14 +1,6 @@
 --- old.assertionTypePredicates1.js
 +++ new.assertionTypePredicates1.js
-@@= skipped -260, +260 lines =@@
-
-
- //// [assertionTypePredicates1.js]
--"use strict";
- const assert = value => { };
- function f01(x) {
-     if (!!true) {
-@@= skipped -119, +118 lines =@@
+@@= skipped -379, +379 lines =@@
      }
  }
  class Test2 extends Test {
diff --git a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js
index bd7c818383..3dd25e9365 100644
--- a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js
+++ b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js
@@ -10,7 +10,6 @@ async function func(): Promise<void> {
 
 //// [asyncUseStrict_es2017.js]
 async function func() {
-    "use strict";
     "use strict";
     var b = await p || a;
 }
diff --git a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js.diff b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js.diff
deleted file mode 100644
index 95134a2928..0000000000
--- a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es2017.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.asyncUseStrict_es2017.js
-+++ new.asyncUseStrict_es2017.js
-@@= skipped -10, +10 lines =@@
- //// [asyncUseStrict_es2017.js]
- async function func() {
-     "use strict";
-+    "use strict";
-     var b = await p || a;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js
index 41e0919be6..19ed5e91e1 100644
--- a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js
+++ b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js
@@ -10,7 +10,6 @@ async function func(): Promise<void> {
 
 //// [asyncUseStrict_es5.js]
 async function func() {
-    "use strict";
     "use strict";
     var b = await p || a;
 }
diff --git a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js.diff b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js.diff
index c85c7e0265..d0d3206774 100644
--- a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es5.js.diff
@@ -11,6 +11,5 @@
 -    });
 +async function func() {
 +    "use strict";
-+    "use strict";
 +    var b = await p || a;
  }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js
index 969ccee0a4..1cc0e0e5a5 100644
--- a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js
+++ b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js
@@ -10,7 +10,6 @@ async function func(): Promise<void> {
 
 //// [asyncUseStrict_es6.js]
 async function func() {
-    "use strict";
     "use strict";
     var b = await p || a;
 }
diff --git a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js.diff b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js.diff
index 552f85a949..593dba9090 100644
--- a/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/asyncUseStrict_es6.js.diff
@@ -11,6 +11,5 @@
 -    });
 +async function func() {
 +    "use strict";
-+    "use strict";
 +    var b = await p || a;
  }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/bivariantInferences.js b/testdata/baselines/reference/submodule/conformance/bivariantInferences.js
index c6d093533f..bfee4ecc6b 100644
--- a/testdata/baselines/reference/submodule/conformance/bivariantInferences.js
+++ b/testdata/baselines/reference/submodule/conformance/bivariantInferences.js
@@ -14,5 +14,6 @@ let x = a.equalsShallow(b);
 
 
 //// [bivariantInferences.js]
+"use strict";
 // Repro from #27337
 let x = a.equalsShallow(b);
diff --git a/testdata/baselines/reference/submodule/conformance/bivariantInferences.js.diff b/testdata/baselines/reference/submodule/conformance/bivariantInferences.js.diff
deleted file mode 100644
index 6cc8b2d54b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/bivariantInferences.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.bivariantInferences.js
-+++ new.bivariantInferences.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [bivariantInferences.js]
--"use strict";
- // Repro from #27337
- let x = a.equalsShallow(b);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChain.3.js b/testdata/baselines/reference/submodule/conformance/callChain.3.js
index 11db94229c..f97b833b64 100644
--- a/testdata/baselines/reference/submodule/conformance/callChain.3.js
+++ b/testdata/baselines/reference/submodule/conformance/callChain.3.js
@@ -13,6 +13,7 @@ let t1 = a?.m?.({x: 12});
 t1 = a!.m!({x: 12});
 
 //// [callChain.3.js]
+"use strict";
 var _a, _b, _c, _d, _e;
 const n1 = (_a = a === null || a === void 0 ? void 0 : a.m) === null || _a === void 0 ? void 0 : _a.call(a, { x: 12 }); // should be an error (`undefined` is not assignable to `number`)
 const n2 = (_b = a === null || a === void 0 ? void 0 : a.m) === null || _b === void 0 ? void 0 : _b.call(a, { x: absorb() }); // likewise
diff --git a/testdata/baselines/reference/submodule/conformance/callChain.3.js.diff b/testdata/baselines/reference/submodule/conformance/callChain.3.js.diff
deleted file mode 100644
index d520e1b5e1..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChain.3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChain.3.js
-+++ new.callChain.3.js
-@@= skipped -12, +12 lines =@@
- t1 = a!.m!({x: 12});
-
- //// [callChain.3.js]
--"use strict";
- var _a, _b, _c, _d, _e;
- const n1 = (_a = a === null || a === void 0 ? void 0 : a.m) === null || _a === void 0 ? void 0 : _a.call(a, { x: 12 }); // should be an error (`undefined` is not assignable to `number`)
- const n2 = (_b = a === null || a === void 0 ? void 0 : a.m) === null || _b === void 0 ? void 0 : _b.call(a, { x: absorb() }); // likewise
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChain.js b/testdata/baselines/reference/submodule/conformance/callChain.js
index b5cd01a145..a8a8806923 100644
--- a/testdata/baselines/reference/submodule/conformance/callChain.js
+++ b/testdata/baselines/reference/submodule/conformance/callChain.js
@@ -44,6 +44,7 @@ o2?.b()!.toString;
 o2?.b()!.toString!;
 
 //// [callChain.js]
+"use strict";
 var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o;
 o1 === null || o1 === void 0 ? void 0 : o1();
 o1 === null || o1 === void 0 ? void 0 : o1(1);
diff --git a/testdata/baselines/reference/submodule/conformance/callChain.js.diff b/testdata/baselines/reference/submodule/conformance/callChain.js.diff
deleted file mode 100644
index 1960941793..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChain.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChain.js
-+++ new.callChain.js
-@@= skipped -43, +43 lines =@@
- o2?.b()!.toString!;
-
- //// [callChain.js]
--"use strict";
- var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o;
- o1 === null || o1 === void 0 ? void 0 : o1();
- o1 === null || o1 === void 0 ? void 0 : o1(1);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainInference.js b/testdata/baselines/reference/submodule/conformance/callChainInference.js
index f8590e733c..38e535d5ec 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainInference.js
+++ b/testdata/baselines/reference/submodule/conformance/callChainInference.js
@@ -19,6 +19,7 @@ value?.foo("a");
 
 
 //// [callChainInference.js]
+"use strict";
 // Repro from #42404
 if (value) {
     value === null || value === void 0 ? void 0 : value.foo("a");
diff --git a/testdata/baselines/reference/submodule/conformance/callChainInference.js.diff b/testdata/baselines/reference/submodule/conformance/callChainInference.js.diff
deleted file mode 100644
index bd331a00b3..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainInference.js
-+++ new.callChainInference.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [callChainInference.js]
--"use strict";
- // Repro from #42404
- if (value) {
-     value === null || value === void 0 ? void 0 : value.foo("a");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js
index 82a8454e77..cc2dd20055 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js.diff
deleted file mode 100644
index d0c5739631..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2016).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2016).js
-+++ new.callChainWithSuper(target=es2016).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js
index 82a8454e77..cc2dd20055 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js.diff
deleted file mode 100644
index 5be2b1eca8..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2017).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2017).js
-+++ new.callChainWithSuper(target=es2017).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js
index 82a8454e77..cc2dd20055 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js.diff
deleted file mode 100644
index 7aab1f49b8..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2018).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2018).js
-+++ new.callChainWithSuper(target=es2018).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js
index 82a8454e77..cc2dd20055 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js.diff
deleted file mode 100644
index 1c507c6c1c..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2019).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2019).js
-+++ new.callChainWithSuper(target=es2019).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js
index 425949dba5..96be01245b 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js.diff
deleted file mode 100644
index a2b7a0f341..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2020).js
-+++ new.callChainWithSuper(target=es2020).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js
index 425949dba5..96be01245b 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js.diff
deleted file mode 100644
index b34e8b91b6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2021).js
-+++ new.callChainWithSuper(target=es2021).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js
index 425949dba5..96be01245b 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js.diff
deleted file mode 100644
index a10834b53a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2022).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2022).js
-+++ new.callChainWithSuper(target=es2022).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js
index 425949dba5..96be01245b 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js.diff
deleted file mode 100644
index 2300089dc1..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2023).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2023).js
-+++ new.callChainWithSuper(target=es2023).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js
index 425949dba5..96be01245b 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js.diff
deleted file mode 100644
index 4722274457..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es2024).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es2024).js
-+++ new.callChainWithSuper(target=es2024).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js
index 82a8454e77..cc2dd20055 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js.diff
deleted file mode 100644
index 07cd4d69f6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es5).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es5).js
-+++ new.callChainWithSuper(target=es5).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js
index 82a8454e77..cc2dd20055 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js.diff
deleted file mode 100644
index 222128348a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=es6).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=es6).js
-+++ new.callChainWithSuper(target=es6).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js
index 425949dba5..96be01245b 100644
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js
@@ -9,6 +9,7 @@ class Derived extends Base {
 }
 
 //// [callChainWithSuper.js]
+"use strict";
 // GH#34952
 class Base {
     method() { }
diff --git a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js.diff
deleted file mode 100644
index 46e1b1edcf..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callChainWithSuper(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callChainWithSuper(target=esnext).js
-+++ new.callChainWithSuper(target=esnext).js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [callChainWithSuper.js]
--"use strict";
- // GH#34952
- class Base {
-     method() { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js b/testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js
index 80569ab15a..51a8f70970 100644
--- a/testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js
+++ b/testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js
@@ -87,6 +87,7 @@ call((x: number | void, y: number | void) => 42, 4, 2) // ok
 
 
 //// [callWithMissingVoid.js]
+"use strict";
 // From #4260
 class X {
     f(t) {
diff --git a/testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js.diff b/testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js.diff
deleted file mode 100644
index a74f972f8d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callWithMissingVoid.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callWithMissingVoid.js
-+++ new.callWithMissingVoid.js
-@@= skipped -86, +86 lines =@@
-
-
- //// [callWithMissingVoid.js]
--"use strict";
- // From #4260
- class X {
-     f(t) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/callWithSpread4.js b/testdata/baselines/reference/submodule/conformance/callWithSpread4.js
index a39e0345f0..03de9b2382 100644
--- a/testdata/baselines/reference/submodule/conformance/callWithSpread4.js
+++ b/testdata/baselines/reference/submodule/conformance/callWithSpread4.js
@@ -33,6 +33,7 @@ pli(...[reads, writes, writes] as const)
 
 
 //// [callWithSpread4.js]
+"use strict";
 pli(reads, ...gun, tr, fun, ...gz, writes);
 test(...anys);
 pli(...[reads, writes, writes]);
diff --git a/testdata/baselines/reference/submodule/conformance/callWithSpread4.js.diff b/testdata/baselines/reference/submodule/conformance/callWithSpread4.js.diff
deleted file mode 100644
index 87ab16cd03..0000000000
--- a/testdata/baselines/reference/submodule/conformance/callWithSpread4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.callWithSpread4.js
-+++ new.callWithSpread4.js
-@@= skipped -32, +32 lines =@@
-
-
- //// [callWithSpread4.js]
--"use strict";
- pli(reads, ...gun, tr, fun, ...gz, writes);
- test(...anys);
- pli(...[reads, writes, writes]);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js b/testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js
index ce9cad01e2..0585e370c2 100644
--- a/testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js
+++ b/testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js
@@ -15,6 +15,7 @@ const y = new C({foobar: "example"});
 const x = <C foobar="example" />
 
 //// [checkJsxIntersectionElementPropsType.jsx]
+"use strict";
 class C extends Component {
 }
 const y = new C({ foobar: "example" });
diff --git a/testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js.diff b/testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js.diff
deleted file mode 100644
index 1304e0e972..0000000000
--- a/testdata/baselines/reference/submodule/conformance/checkJsxIntersectionElementPropsType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.checkJsxIntersectionElementPropsType.js
-+++ new.checkJsxIntersectionElementPropsType.js
-@@= skipped -14, +14 lines =@@
- const x = <C foobar="example" />
-
- //// [checkJsxIntersectionElementPropsType.jsx]
--"use strict";
- class C extends Component {
- }
- const y = new C({ foobar: "example" });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js b/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js
index 419fd73bd8..47e0b670ef 100644
--- a/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js
+++ b/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js
@@ -12,6 +12,7 @@ class C {
 console.log(foo)
 
 //// [classStaticBlock28.js]
+"use strict";
 let foo;
 class C {
     static {
diff --git a/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js.diff b/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js.diff
index 8c8982be7c..4b58f108a1 100644
--- a/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/classStaticBlock28.js.diff
@@ -1,10 +1,7 @@
 --- old.classStaticBlock28.js
 +++ new.classStaticBlock28.js
-@@= skipped -11, +11 lines =@@
- console.log(foo)
-
- //// [classStaticBlock28.js]
--"use strict";
+@@= skipped -14, +14 lines =@@
+ "use strict";
  let foo;
  class C {
 +    static {
diff --git a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js b/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js
index 65b10894bf..242781c8c8 100644
--- a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js
+++ b/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js
@@ -15,6 +15,7 @@ class C {
 
 
 //// [classStaticBlockUseBeforeDef4.js]
+"use strict";
 class C {
     static accessor x;
     static {
diff --git a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js.diff b/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js.diff
deleted file mode 100644
index b9228f68b4..0000000000
--- a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.classStaticBlockUseBeforeDef4.js
-+++ new.classStaticBlockUseBeforeDef4.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [classStaticBlockUseBeforeDef4.js]
--"use strict";
- class C {
-     static accessor x;
-     static {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js b/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js
index f87cf52a23..d120f33abd 100644
--- a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js
+++ b/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js
@@ -10,6 +10,7 @@ class C {
 
 
 //// [classStaticBlockUseBeforeDef5.js]
+"use strict";
 class C {
     static {
         this.x = 1;
diff --git a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js.diff b/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js.diff
deleted file mode 100644
index 10244f9486..0000000000
--- a/testdata/baselines/reference/submodule/conformance/classStaticBlockUseBeforeDef5.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.classStaticBlockUseBeforeDef5.js
-+++ new.classStaticBlockUseBeforeDef5.js
-@@= skipped -9, +9 lines =@@
-
-
- //// [classStaticBlockUseBeforeDef5.js]
--"use strict";
- class C {
-     static {
-         this.x = 1;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js b/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js
index 0101e0fc20..cf23628bec 100644
--- a/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js
+++ b/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js
@@ -364,6 +364,7 @@ type Weird2 = (<U extends boolean>(a: U) => U) extends
 
 
 //// [conditionalTypes1.js]
+"use strict";
 function f1(x, y) {
     x = y;
     y = x; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js.diff b/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js.diff
index c812303c18..3579b956e9 100644
--- a/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/conditionalTypes1.js.diff
@@ -1,14 +1,6 @@
 --- old.conditionalTypes1.js
 +++ new.conditionalTypes1.js
-@@= skipped -363, +363 lines =@@
-
-
- //// [conditionalTypes1.js]
--"use strict";
- function f1(x, y) {
-     x = y;
-     y = x; // Error
-@@= skipped -285, +284 lines =@@
+@@= skipped -648, +648 lines =@@
  type Bar<T> = T extends string ? boolean : number;
  declare const convert: <U>(value: Foo<U>) => Bar<U>;
  type Baz<T> = Foo<T>;
diff --git a/testdata/baselines/reference/submodule/conformance/conditionalTypes2.js b/testdata/baselines/reference/submodule/conformance/conditionalTypes2.js
index e6a1560873..fd30055a5a 100644
--- a/testdata/baselines/reference/submodule/conformance/conditionalTypes2.js
+++ b/testdata/baselines/reference/submodule/conformance/conditionalTypes2.js
@@ -248,6 +248,7 @@ type Huh = Wat<"y">;  // true
 
 
 //// [conditionalTypes2.js]
+"use strict";
 function f1(a, b) {
     a = b;
     b = a; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/conditionalTypes2.js.diff b/testdata/baselines/reference/submodule/conformance/conditionalTypes2.js.diff
deleted file mode 100644
index d9c43e957d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/conditionalTypes2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.conditionalTypes2.js
-+++ new.conditionalTypes2.js
-@@= skipped -247, +247 lines =@@
-
-
- //// [conditionalTypes2.js]
--"use strict";
- function f1(a, b) {
-     a = b;
-     b = a; // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js b/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js
index 382b9ad769..7273b0ce53 100644
--- a/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js
+++ b/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js
@@ -44,6 +44,7 @@ var Bar;
 let foo = Foo.A;
 let bar = Bar.A;
 //// [ns.js]
+"use strict";
 var ns;
 (function (ns) {
     let Foo;
diff --git a/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js.diff b/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js.diff
index de6b1d519e..7a646420b9 100644
--- a/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/constAssertionOnEnum.js.diff
@@ -10,15 +10,7 @@
  (function (Foo) {
      Foo[Foo["A"] = 0] = "A";
      Foo[Foo["B"] = 1] = "B";
-@@= skipped -15, +16 lines =@@
- let foo = Foo.A;
- let bar = Bar.A;
- //// [ns.js]
--"use strict";
- var ns;
- (function (ns) {
-     let Foo;
-@@= skipped -10, +9 lines =@@
+@@= skipped -25, +26 lines =@@
      ns.Foo.X;
  })(ns || (ns = {}));
  //// [more.js]
diff --git a/testdata/baselines/reference/submodule/conformance/constAssertions.js b/testdata/baselines/reference/submodule/conformance/constAssertions.js
index fb52bb68f6..10137051a5 100644
--- a/testdata/baselines/reference/submodule/conformance/constAssertions.js
+++ b/testdata/baselines/reference/submodule/conformance/constAssertions.js
@@ -123,6 +123,7 @@ const fooConst54374: Foo54374 = {
 
 
 //// [constAssertions.js]
+"use strict";
 let v1 = 'abc';
 let v2 = `abc`;
 let v3 = 10;
diff --git a/testdata/baselines/reference/submodule/conformance/constAssertions.js.diff b/testdata/baselines/reference/submodule/conformance/constAssertions.js.diff
deleted file mode 100644
index 48f9e54325..0000000000
--- a/testdata/baselines/reference/submodule/conformance/constAssertions.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.constAssertions.js
-+++ new.constAssertions.js
-@@= skipped -122, +122 lines =@@
-
-
- //// [constAssertions.js]
--"use strict";
- let v1 = 'abc';
- let v2 = `abc`;
- let v3 = 10;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/constructBigint.js b/testdata/baselines/reference/submodule/conformance/constructBigint.js
index f3a180c3f4..1306336d29 100644
--- a/testdata/baselines/reference/submodule/conformance/constructBigint.js
+++ b/testdata/baselines/reference/submodule/conformance/constructBigint.js
@@ -14,6 +14,7 @@ BigInt(undefined)
 
 
 //// [constructBigint.js]
+"use strict";
 BigInt(1);
 BigInt(1n);
 BigInt("0");
diff --git a/testdata/baselines/reference/submodule/conformance/constructBigint.js.diff b/testdata/baselines/reference/submodule/conformance/constructBigint.js.diff
deleted file mode 100644
index 32e8db9260..0000000000
--- a/testdata/baselines/reference/submodule/conformance/constructBigint.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.constructBigint.js
-+++ new.constructBigint.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [constructBigint.js]
--"use strict";
- BigInt(1);
- BigInt(1n);
- BigInt("0");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js b/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js
index 0c8cd0fa66..2cd4a9f063 100644
--- a/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js
+++ b/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js
@@ -304,6 +304,7 @@ class A53267 {
 }
 
 //// [controlFlowAliasing.js]
+"use strict";
 // Narrowing by aliased conditional expressions
 function f10(x) {
     const isString = typeof x === "string";
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js.diff b/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js.diff
index 3fb08ed871..39155803da 100644
--- a/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/controlFlowAliasing.js.diff
@@ -1,14 +1,6 @@
 --- old.controlFlowAliasing.js
 +++ new.controlFlowAliasing.js
-@@= skipped -303, +303 lines =@@
- }
-
- //// [controlFlowAliasing.js]
--"use strict";
- // Narrowing by aliased conditional expressions
- function f10(x) {
-     const isString = typeof x === "string";
-@@= skipped -193, +192 lines =@@
+@@= skipped -496, +496 lines =@@
      }
  }
  class C10 {
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js b/testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js
index 134178ba69..34a9519d6c 100644
--- a/testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js
+++ b/testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js
@@ -16,6 +16,7 @@ if (typeof config.works !== 'boolean') {
 
 
 //// [controlFlowElementAccess2.js]
+"use strict";
 if (typeof config['works'] !== 'boolean') {
     config.works.prop = 'test'; // ok
     config['works'].prop = 'test'; // error, config['works']: boolean | { 'prop': string }
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js.diff b/testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js.diff
deleted file mode 100644
index db9630ab49..0000000000
--- a/testdata/baselines/reference/submodule/conformance/controlFlowElementAccess2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowElementAccess2.js
-+++ new.controlFlowElementAccess2.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [controlFlowElementAccess2.js]
--"use strict";
- if (typeof config['works'] !== 'boolean') {
-     config.works.prop = 'test'; // ok
-     config['works'].prop = 'test'; // error, config['works']: boolean | { 'prop': string }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js b/testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js
index 89ddf473cb..75b55c009c 100644
--- a/testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js
+++ b/testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js
@@ -16,6 +16,7 @@ if (x = o ?? true) {
 
 
 //// [controlFlowNullishCoalesce.js]
+"use strict";
 // assignments in shortcutting rhs
 let a;
 o !== null && o !== void 0 ? o : (a = 1);
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js.diff b/testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js.diff
deleted file mode 100644
index 854fe2db2d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/controlFlowNullishCoalesce.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowNullishCoalesce.js
-+++ new.controlFlowNullishCoalesce.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [controlFlowNullishCoalesce.js]
--"use strict";
- // assignments in shortcutting rhs
- let a;
- o !== null && o !== void 0 ? o : (a = 1);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js b/testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js
index 4748544be2..511a39deff 100644
--- a/testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js
+++ b/testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js
@@ -610,6 +610,7 @@ function f50(obj: Test5) {
 }
 
 //// [controlFlowOptionalChain.js]
+"use strict";
 var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r, _s, _t, _u, _v;
 let a;
 o === null || o === void 0 ? void 0 : o[a = 1];
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js.diff b/testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js.diff
deleted file mode 100644
index 1023f88382..0000000000
--- a/testdata/baselines/reference/submodule/conformance/controlFlowOptionalChain.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowOptionalChain.js
-+++ new.controlFlowOptionalChain.js
-@@= skipped -609, +609 lines =@@
- }
-
- //// [controlFlowOptionalChain.js]
--"use strict";
- var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r, _s, _t, _u, _v;
- let a;
- o === null || o === void 0 ? void 0 : o[a = 1];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js b/testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js
index 49b0cc68d1..f7c150dd68 100644
--- a/testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js
+++ b/testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js
@@ -14,6 +14,7 @@ if (value.foo !== null) {
 
 
 //// [controlFlowStringIndex.js]
+"use strict";
 if (value.foo !== null) {
     value.foo.toExponential();
     value.other; // should still be number | null
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js.diff b/testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js.diff
deleted file mode 100644
index d78bd174cd..0000000000
--- a/testdata/baselines/reference/submodule/conformance/controlFlowStringIndex.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowStringIndex.js
-+++ new.controlFlowStringIndex.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [controlFlowStringIndex.js]
--"use strict";
- if (value.foo !== null) {
-     value.foo.toExponential();
-     value.other; // should still be number | null
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js b/testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js
index eecaca2a9f..df0ecda867 100644
--- a/testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js
+++ b/testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js
@@ -72,6 +72,7 @@ function f6(x: unknown) {
 
 
 //// [controlFlowTypeofObject.js]
+"use strict";
 function f1(x) {
     if (!x) {
         return;
diff --git a/testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js.diff b/testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js.diff
deleted file mode 100644
index bfd7c73373..0000000000
--- a/testdata/baselines/reference/submodule/conformance/controlFlowTypeofObject.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.controlFlowTypeofObject.js
-+++ new.controlFlowTypeofObject.js
-@@= skipped -71, +71 lines =@@
-
-
- //// [controlFlowTypeofObject.js]
--"use strict";
- function f1(x) {
-     if (!x) {
-         return;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/covariantCallbacks.js b/testdata/baselines/reference/submodule/conformance/covariantCallbacks.js
index 15761fa3a8..226e7d3ab5 100644
--- a/testdata/baselines/reference/submodule/conformance/covariantCallbacks.js
+++ b/testdata/baselines/reference/submodule/conformance/covariantCallbacks.js
@@ -111,6 +111,7 @@ s2 = s1;
 
 
 //// [covariantCallbacks.js]
+"use strict";
 // Test that callback parameters are related covariantly
 ;
 function f1(a, b) {
diff --git a/testdata/baselines/reference/submodule/conformance/covariantCallbacks.js.diff b/testdata/baselines/reference/submodule/conformance/covariantCallbacks.js.diff
deleted file mode 100644
index 6b1c2051a6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/covariantCallbacks.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.covariantCallbacks.js
-+++ new.covariantCallbacks.js
-@@= skipped -110, +110 lines =@@
-
-
- //// [covariantCallbacks.js]
--"use strict";
- // Test that callback parameters are related covariantly
- ;
- function f1(a, b) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js b/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js
index 7f1a25fb57..615113c1c9 100644
--- a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js
+++ b/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js
@@ -85,6 +85,7 @@ declare namespace foo {
 
 
 //// [definiteAssignmentAssertions.js]
+"use strict";
 // Suppress strict property initialization check
 class C1 {
     a;
diff --git a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js.diff b/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js.diff
index 2f481af877..23d06fe330 100644
--- a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertions.js.diff
@@ -1,10 +1,7 @@
 --- old.definiteAssignmentAssertions.js
 +++ new.definiteAssignmentAssertions.js
-@@= skipped -84, +84 lines =@@
-
-
- //// [definiteAssignmentAssertions.js]
--"use strict";
+@@= skipped -87, +87 lines =@@
+ "use strict";
  // Suppress strict property initialization check
  class C1 {
 +    a;
diff --git a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js b/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js
index 8b9233a672..7b9b377137 100644
--- a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js
+++ b/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js
@@ -9,6 +9,7 @@ const bar = {
 }
 
 //// [definiteAssignmentAssertionsWithObjectShortHand.js]
+"use strict";
 const a = 'ff';
 const foo = { a };
 const bar = {
diff --git a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js.diff b/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js.diff
deleted file mode 100644
index d47c1b1ccc..0000000000
--- a/testdata/baselines/reference/submodule/conformance/definiteAssignmentAssertionsWithObjectShortHand.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.definiteAssignmentAssertionsWithObjectShortHand.js
-+++ new.definiteAssignmentAssertionsWithObjectShortHand.js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [definiteAssignmentAssertionsWithObjectShortHand.js]
--"use strict";
- const a = 'ff';
- const foo = { a };
- const bar = {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/deleteChain.js b/testdata/baselines/reference/submodule/conformance/deleteChain.js
index fec4d370a2..694497a6d2 100644
--- a/testdata/baselines/reference/submodule/conformance/deleteChain.js
+++ b/testdata/baselines/reference/submodule/conformance/deleteChain.js
@@ -27,6 +27,7 @@ delete o6.b?.['c'].d?.['e'];
 delete (o6.b?.['c'].d?.['e']);
 
 //// [deleteChain.js]
+"use strict";
 var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r;
 o1 === null || o1 === void 0 ? true : delete o1.b;
 (o1 === null || o1 === void 0 ? true : delete o1.b);
diff --git a/testdata/baselines/reference/submodule/conformance/deleteChain.js.diff b/testdata/baselines/reference/submodule/conformance/deleteChain.js.diff
deleted file mode 100644
index a393358242..0000000000
--- a/testdata/baselines/reference/submodule/conformance/deleteChain.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.deleteChain.js
-+++ new.deleteChain.js
-@@= skipped -26, +26 lines =@@
- delete (o6.b?.['c'].d?.['e']);
-
- //// [deleteChain.js]
--"use strict";
- var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q, _r;
- o1 === null || o1 === void 0 ? true : delete o1.b;
- (o1 === null || o1 === void 0 ? true : delete o1.b);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js b/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js
index 52834bb8da..5608e852eb 100644
--- a/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js
+++ b/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js
@@ -468,6 +468,7 @@ const parameterReassignedContextualRest1: (...args: [1, 2] | [3, 4]) => void = (
 
 
 //// [dependentDestructuredVariables.js]
+"use strict";
 function f10({ kind, payload }) {
     if (kind === 'A') {
         payload.toFixed();
diff --git a/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js.diff b/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js.diff
index 6c5a39f865..b47a324234 100644
--- a/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/dependentDestructuredVariables.js.diff
@@ -1,10 +1,9 @@
 --- old.dependentDestructuredVariables.js
 +++ new.dependentDestructuredVariables.js
-@@= skipped -467, +467 lines =@@
-
+@@= skipped -468, +468 lines =@@
 
  //// [dependentDestructuredVariables.js]
--"use strict";
+ "use strict";
 -var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
 -    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
 -    return new (P || (P = Promise))(function (resolve, reject) {
@@ -30,7 +29,7 @@
  function f10({ kind, payload }) {
      if (kind === 'A') {
          payload.toFixed();
-@@= skipped -217, +194 lines =@@
+@@= skipped -216, +194 lines =@@
      }
  };
  let fooAsyncM = {
diff --git a/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js b/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js
index f86244748d..e4cdaf5ec5 100644
--- a/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js
+++ b/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js
@@ -85,6 +85,7 @@ class M extends L {
 
 
 //// [derivedUninitializedPropertyDeclaration.js]
+"use strict";
 class A {
     property = 'x';
     m() { return 1; }
diff --git a/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js.diff b/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js.diff
index fdbdf977aa..4658d7ec16 100644
--- a/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/derivedUninitializedPropertyDeclaration.js.diff
@@ -1,10 +1,8 @@
 --- old.derivedUninitializedPropertyDeclaration.js
 +++ new.derivedUninitializedPropertyDeclaration.js
-@@= skipped -84, +84 lines =@@
-
-
+@@= skipped -86, +86 lines =@@
  //// [derivedUninitializedPropertyDeclaration.js]
--"use strict";
+ "use strict";
  class A {
 -    constructor() {
 -        this.property = 'x';
@@ -17,7 +15,7 @@
  }
  class BD extends A {
  }
-@@= skipped -19, +17 lines =@@
+@@= skipped -17, +16 lines =@@
  class U {
  }
  class C {
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js b/testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js
index aeb5b40522..a8d7f94dd8 100644
--- a/testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js
+++ b/testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js
@@ -9,5 +9,6 @@ const [value] = data; // Error
 
 
 //// [destructuringArrayBindingPatternAndAssignment4.js]
+"use strict";
 // #35497
 const [value] = data; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js.diff b/testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js.diff
deleted file mode 100644
index 02f2dc572b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/destructuringArrayBindingPatternAndAssignment4.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.destructuringArrayBindingPatternAndAssignment4.js
-+++ new.destructuringArrayBindingPatternAndAssignment4.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [destructuringArrayBindingPatternAndAssignment4.js]
--"use strict";
- // #35497
- const [value] = data; // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js b/testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js
index f68a89d06a..647eb1d0b3 100644
--- a/testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js
+++ b/testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js
@@ -19,6 +19,7 @@ const []: {} = {}
 
 
 //// [destructuringAssignabilityCheck.js]
+"use strict";
 const [] = {}; // should be error
 const {} = undefined; // error correctly
 (([]) => 0)({}); // should be error
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js.diff b/testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js.diff
deleted file mode 100644
index 705912dba9..0000000000
--- a/testdata/baselines/reference/submodule/conformance/destructuringAssignabilityCheck.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructuringAssignabilityCheck.js
-+++ new.destructuringAssignabilityCheck.js
-@@= skipped -18, +18 lines =@@
-
-
- //// [destructuringAssignabilityCheck.js]
--"use strict";
- const [] = {}; // should be error
- const {} = undefined; // error correctly
- (([]) => 0)({}); // should be error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js b/testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js
index d0a1672ed4..ba5018b5a6 100644
--- a/testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js
+++ b/testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js
@@ -44,6 +44,7 @@ value.toUpperCase();  // Error
 
 
 //// [destructuringControlFlow.js]
+"use strict";
 function f1(obj) {
     if (obj.a) {
         obj = {};
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js.diff b/testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js.diff
deleted file mode 100644
index 4c2699962d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/destructuringControlFlow.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructuringControlFlow.js
-+++ new.destructuringControlFlow.js
-@@= skipped -43, +43 lines =@@
-
-
- //// [destructuringControlFlow.js]
--"use strict";
- function f1(obj) {
-     if (obj.a) {
-         obj = {};
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js b/testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js
index 7dd242ffc7..de0419ca55 100644
--- a/testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js
+++ b/testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js
@@ -31,6 +31,7 @@ function f43([x = 0, y = 'bar'] = [sx, nx]) {}
 
 
 //// [destructuringWithLiteralInitializers2.js]
+"use strict";
 function f00([x, y]) { }
 function f01([x, y] = []) { }
 function f02([x, y] = [1]) { }
diff --git a/testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js.diff b/testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js.diff
deleted file mode 100644
index 8708832740..0000000000
--- a/testdata/baselines/reference/submodule/conformance/destructuringWithLiteralInitializers2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.destructuringWithLiteralInitializers2.js
-+++ new.destructuringWithLiteralInitializers2.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [destructuringWithLiteralInitializers2.js]
--"use strict";
- function f00([x, y]) { }
- function f01([x, y] = []) { }
- function f02([x, y] = [1]) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js b/testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js
index 77610cf1f1..d74ea15ef8 100644
--- a/testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js
+++ b/testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js
@@ -23,6 +23,7 @@ let x2 = foo({ kind: 'b', data: [1, 2] });  // number
 
 
 //// [discriminatedUnionInference.js]
+"use strict";
 // Repro from #28862
 let x1 = foo({ kind: 'a', data: 42 }); // number
 let x2 = foo({ kind: 'b', data: [1, 2] }); // number
diff --git a/testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js.diff b/testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js.diff
deleted file mode 100644
index 7503ed9c8f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/discriminatedUnionInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.discriminatedUnionInference.js
-+++ new.discriminatedUnionInference.js
-@@= skipped -22, +22 lines =@@
-
-
- //// [discriminatedUnionInference.js]
--"use strict";
- // Repro from #28862
- let x1 = foo({ kind: 'a', data: 42 }); // number
- let x2 = foo({ kind: 'b', data: [1, 2] }); // number
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js b/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js
index 72b0b005f8..acc6553cb4 100644
--- a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js
+++ b/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js
@@ -147,6 +147,7 @@ function foo2(x: RuntimeValue & ({ type: 'number' } | { type: 'string' })) {
 
 
 //// [discriminatedUnionTypes2.js]
+"use strict";
 function f10(x) {
     if (x.kind === false) {
         x.a;
diff --git a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js.diff b/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js.diff
deleted file mode 100644
index c2b993041e..0000000000
--- a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.discriminatedUnionTypes2.js
-+++ new.discriminatedUnionTypes2.js
-@@= skipped -146, +146 lines =@@
-
-
- //// [discriminatedUnionTypes2.js]
--"use strict";
- function f10(x) {
-     if (x.kind === false) {
-         x.a;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js b/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js
index abd4948cf8..a2e8fc6422 100644
--- a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js
+++ b/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js
@@ -20,6 +20,7 @@ if (example.err === undefined) {
 }
 
 //// [discriminatedUnionTypes3.js]
+"use strict";
 // Repro from #44435
 const example = {};
 if (example.err === undefined) {
diff --git a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js.diff b/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js.diff
deleted file mode 100644
index db44a5cc27..0000000000
--- a/testdata/baselines/reference/submodule/conformance/discriminatedUnionTypes3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.discriminatedUnionTypes3.js
-+++ new.discriminatedUnionTypes3.js
-@@= skipped -19, +19 lines =@@
- }
-
- //// [discriminatedUnionTypes3.js]
--"use strict";
- // Repro from #44435
- const example = {};
- if (example.err === undefined) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js b/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js
index 0185a342a4..2db7a77193 100644
--- a/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js
+++ b/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js
@@ -32,6 +32,7 @@ for (obj?.a["b"] of []);
 
 
 //// [elementAccessChain.3.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js.diff b/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js.diff
index cb9656718f..85025aae92 100644
--- a/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/elementAccessChain.3.js.diff
@@ -1,14 +1,6 @@
 --- old.elementAccessChain.3.js
 +++ new.elementAccessChain.3.js
-@@= skipped -31, +31 lines =@@
-
-
- //// [elementAccessChain.3.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
-@@= skipped -12, +11 lines =@@
+@@= skipped -43, +43 lines =@@
          }
      return t;
  };
diff --git a/testdata/baselines/reference/submodule/conformance/elementAccessChain.js b/testdata/baselines/reference/submodule/conformance/elementAccessChain.js
index e2a8876c43..4fe7a549e8 100644
--- a/testdata/baselines/reference/submodule/conformance/elementAccessChain.js
+++ b/testdata/baselines/reference/submodule/conformance/elementAccessChain.js
@@ -33,6 +33,7 @@ o2?.["b"]!.c!;
 o2?.["b"]!["c"]!;
 
 //// [elementAccessChain.js]
+"use strict";
 var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q;
 o1 === null || o1 === void 0 ? void 0 : o1["b"];
 o2 === null || o2 === void 0 ? void 0 : o2["b"].c;
diff --git a/testdata/baselines/reference/submodule/conformance/elementAccessChain.js.diff b/testdata/baselines/reference/submodule/conformance/elementAccessChain.js.diff
deleted file mode 100644
index 6b2e68a5e1..0000000000
--- a/testdata/baselines/reference/submodule/conformance/elementAccessChain.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.elementAccessChain.js
-+++ new.elementAccessChain.js
-@@= skipped -32, +32 lines =@@
- o2?.["b"]!["c"]!;
-
- //// [elementAccessChain.js]
--"use strict";
- var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l, _m, _o, _p, _q;
- o1 === null || o1 === void 0 ? void 0 : o1["b"];
- o2 === null || o2 === void 0 ? void 0 : o2["b"].c;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js b/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js
index 0ce8c434c5..f4f4c0052a 100644
--- a/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js
+++ b/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js
@@ -14,6 +14,7 @@ enum E {
 
 
 //// [enumErrorOnConstantBindingWithInitializer.js]
+"use strict";
 const { value = "123" } = thing;
 var E;
 (function (E) {
diff --git a/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js.diff b/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js.diff
index 0e1507b3ef..e7d127b21f 100644
--- a/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/enumErrorOnConstantBindingWithInitializer.js.diff
@@ -1,10 +1,6 @@
 --- old.enumErrorOnConstantBindingWithInitializer.js
 +++ new.enumErrorOnConstantBindingWithInitializer.js
-@@= skipped -13, +13 lines =@@
-
-
- //// [enumErrorOnConstantBindingWithInitializer.js]
--"use strict";
+@@= skipped -17, +17 lines =@@
  const { value = "123" } = thing;
  var E;
  (function (E) {
diff --git a/testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js b/testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js
index 48f5a576b8..f099c08a00 100644
--- a/testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js
+++ b/testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js
@@ -45,6 +45,7 @@ function f2(v: E2) {
 
 
 //// [equalityWithEnumTypes.js]
+"use strict";
 // Literal enum type
 var E1;
 (function (E1) {
diff --git a/testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js.diff b/testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js.diff
deleted file mode 100644
index d36fa27b9e..0000000000
--- a/testdata/baselines/reference/submodule/conformance/equalityWithEnumTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.equalityWithEnumTypes.js
-+++ new.equalityWithEnumTypes.js
-@@= skipped -44, +44 lines =@@
-
-
- //// [equalityWithEnumTypes.js]
--"use strict";
- // Literal enum type
- var E1;
- (function (E1) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js b/testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js
index e409ee7bfb..74e54505d9 100644
--- a/testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js
+++ b/testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js
@@ -20,6 +20,7 @@ function f2() {
 
 
 //// [equalityWithtNullishCoalescingAssignment.js]
+"use strict";
 function f1(a) {
     a !== null && a !== void 0 ? a : (a = true);
     if (a === false) {
diff --git a/testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js.diff b/testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js.diff
deleted file mode 100644
index 2982f01281..0000000000
--- a/testdata/baselines/reference/submodule/conformance/equalityWithtNullishCoalescingAssignment(strict=true).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.equalityWithtNullishCoalescingAssignment(strict=true).js
-+++ new.equalityWithtNullishCoalescingAssignment(strict=true).js
-@@= skipped -19, +19 lines =@@
-
-
- //// [equalityWithtNullishCoalescingAssignment.js]
--"use strict";
- function f1(a) {
-     a !== null && a !== void 0 ? a : (a = true);
-     if (a === false) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js b/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js
index 1f62765c21..5914306e3a 100644
--- a/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js
+++ b/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js
@@ -47,7 +47,6 @@ class A {
 }
 class B extends A {
     constructor() {
-        'inject';
         'inject';
         super();
         const a = 1;
diff --git a/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js.diff b/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js.diff
index 1ea5eafd55..36c8c78408 100644
--- a/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/esDecorators-classDeclaration-classSuper.7.js.diff
@@ -28,7 +28,6 @@
 +class B extends A {
 +    constructor() {
 +        'inject';
-+        'inject';
 +        super();
 +        const a = 1;
 +        const b = 1;
@@ -39,7 +38,7 @@
  function foo(method, _context) {
      return function () {
          method.call(this);
-@@= skipped -28, +18 lines =@@
+@@= skipped -28, +17 lines =@@
  }
  new B();
  // https://github.com/microsoft/TypeScript/issues/53448
diff --git a/testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js b/testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js
index c1e660917d..456f5794b3 100644
--- a/testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js
+++ b/testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js
@@ -252,6 +252,7 @@ function f35431(a: A) {
 }
 
 //// [exhaustiveSwitchStatements1.js]
+"use strict";
 function f1(x) {
     if (!!true) {
         switch (x) {
diff --git a/testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js.diff b/testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js.diff
deleted file mode 100644
index f0e3665f5b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/exhaustiveSwitchStatements1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.exhaustiveSwitchStatements1.js
-+++ new.exhaustiveSwitchStatements1.js
-@@= skipped -251, +251 lines =@@
- }
-
- //// [exhaustiveSwitchStatements1.js]
--"use strict";
- function f1(x) {
-     if (!!true) {
-         switch (x) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js b/testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js
index d942c23ddc..20b4ebeb2e 100644
--- a/testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js
+++ b/testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js
@@ -995,7 +995,6 @@ define(function () {
 // Repro from #10697
 (function (define, undefined) {
     define(function () {
-        'use strict';
         'use strict';
         var impl = {};
         impl.mobileDetectRules = {
diff --git a/testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js.diff b/testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js.diff
deleted file mode 100644
index cf9c010069..0000000000
--- a/testdata/baselines/reference/submodule/conformance/fixSignatureCaching.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.fixSignatureCaching.js
-+++ new.fixSignatureCaching.js
-@@= skipped -995, +995 lines =@@
- (function (define, undefined) {
-     define(function () {
-         'use strict';
-+        'use strict';
-         var impl = {};
-         impl.mobileDetectRules = {
-             "phones": {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js b/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js
index 81a2f374c4..52bb15d659 100644
--- a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js
+++ b/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js
@@ -57,49 +57,38 @@ Object.defineProperty(exports, "__esModule", { value: true });
 exports.foo = void 0;
 function a(a = 10) {
     "use strict";
-    "use strict";
 }
 exports.foo = 10;
 function b(a = 10) {
 }
 function container() {
-    "use strict";
     "use strict";
     function f(a = 10) {
     }
 }
 function rest(...args) {
     'use strict';
-    'use strict';
 }
 function rest1(a = 1, ...args) {
     'use strict';
-    'use strict';
 }
 function paramDefault(param = 1) {
     'use strict';
-    'use strict';
 }
 function objectBindingPattern({ foo }) {
     'use strict';
-    'use strict';
 }
 function arrayBindingPattern([foo]) {
     'use strict';
-    'use strict';
 }
 function manyParameter(a = 10, b = 20) {
     "use strict";
-    "use strict";
 }
 function manyPrologue(a = 10, b = 20) {
     "foo";
     "use strict";
-    "foo";
-    "use strict";
 }
 function invalidPrologue(a = 10, b = 20) {
-    "foo";
     "foo";
     const c = 1;
     "use strict";
diff --git a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js.diff b/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js.diff
deleted file mode 100644
index 696dc6db3b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList.js.diff
+++ /dev/null
@@ -1,52 +0,0 @@
---- old.functionWithUseStrictAndSimpleParameterList.js
-+++ new.functionWithUseStrictAndSimpleParameterList.js
-@@= skipped -56, +56 lines =@@
- exports.foo = void 0;
- function a(a = 10) {
-     "use strict";
-+    "use strict";
- }
- exports.foo = 10;
- function b(a = 10) {
- }
- function container() {
-     "use strict";
-+    "use strict";
-     function f(a = 10) {
-     }
- }
- function rest(...args) {
-     'use strict';
-+    'use strict';
- }
- function rest1(a = 1, ...args) {
-     'use strict';
-+    'use strict';
- }
- function paramDefault(param = 1) {
-     'use strict';
-+    'use strict';
- }
- function objectBindingPattern({ foo }) {
-     'use strict';
-+    'use strict';
- }
- function arrayBindingPattern([foo]) {
-     'use strict';
-+    'use strict';
- }
- function manyParameter(a = 10, b = 20) {
-     "use strict";
-+    "use strict";
- }
- function manyPrologue(a = 10, b = 20) {
-     "foo";
-     "use strict";
-+    "foo";
-+    "use strict";
- }
- function invalidPrologue(a = 10, b = 20) {
-+    "foo";
-     "foo";
-     const c = 1;
-     "use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js b/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js
index 843fd9e0e7..d1386037c8 100644
--- a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js
+++ b/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js
@@ -54,49 +54,38 @@ function invalidPrologue(a = 10, b = 20) {
 //// [functionWithUseStrictAndSimpleParameterList_es2016.js]
 function a(a = 10) {
     "use strict";
-    "use strict";
 }
 export var foo = 10;
 function b(a = 10) {
 }
 function container() {
-    "use strict";
     "use strict";
     function f(a = 10) {
     }
 }
 function rest(...args) {
     'use strict';
-    'use strict';
 }
 function rest1(a = 1, ...args) {
     'use strict';
-    'use strict';
 }
 function paramDefault(param = 1) {
     'use strict';
-    'use strict';
 }
 function objectBindingPattern({ foo }) {
     'use strict';
-    'use strict';
 }
 function arrayBindingPattern([foo]) {
     'use strict';
-    'use strict';
 }
 function manyParameter(a = 10, b = 20) {
     "use strict";
-    "use strict";
 }
 function manyPrologue(a = 10, b = 20) {
     "foo";
     "use strict";
-    "foo";
-    "use strict";
 }
 function invalidPrologue(a = 10, b = 20) {
-    "foo";
     "foo";
     const c = 1;
     "use strict";
diff --git a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js.diff b/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js.diff
deleted file mode 100644
index f788cee0f0..0000000000
--- a/testdata/baselines/reference/submodule/conformance/functionWithUseStrictAndSimpleParameterList_es2016.js.diff
+++ /dev/null
@@ -1,52 +0,0 @@
---- old.functionWithUseStrictAndSimpleParameterList_es2016.js
-+++ new.functionWithUseStrictAndSimpleParameterList_es2016.js
-@@= skipped -53, +53 lines =@@
- //// [functionWithUseStrictAndSimpleParameterList_es2016.js]
- function a(a = 10) {
-     "use strict";
-+    "use strict";
- }
- export var foo = 10;
- function b(a = 10) {
- }
- function container() {
-     "use strict";
-+    "use strict";
-     function f(a = 10) {
-     }
- }
- function rest(...args) {
-     'use strict';
-+    'use strict';
- }
- function rest1(a = 1, ...args) {
-     'use strict';
-+    'use strict';
- }
- function paramDefault(param = 1) {
-     'use strict';
-+    'use strict';
- }
- function objectBindingPattern({ foo }) {
-     'use strict';
-+    'use strict';
- }
- function arrayBindingPattern([foo]) {
-     'use strict';
-+    'use strict';
- }
- function manyParameter(a = 10, b = 20) {
-     "use strict";
-+    "use strict";
- }
- function manyPrologue(a = 10, b = 20) {
-     "foo";
-     "use strict";
-+    "foo";
-+    "use strict";
- }
- function invalidPrologue(a = 10, b = 20) {
-+    "foo";
-     "foo";
-     const c = 1;
-     "use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js b/testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js
index 8974809368..1a76d5ad40 100644
--- a/testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js
+++ b/testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js
@@ -39,6 +39,7 @@ async function* g4(): AsyncIterator<any, { x: 'x' }, any> {
 
 
 //// [generatorReturnContextualType.js]
+"use strict";
 // #35995
 function* f1() {
     return { x: 'x' };
diff --git a/testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js.diff b/testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js.diff
deleted file mode 100644
index 8010d22369..0000000000
--- a/testdata/baselines/reference/submodule/conformance/generatorReturnContextualType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.generatorReturnContextualType.js
-+++ new.generatorReturnContextualType.js
-@@= skipped -38, +38 lines =@@
-
-
- //// [generatorReturnContextualType.js]
--"use strict";
- // #35995
- function* f1() {
-     return { x: 'x' };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js b/testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js
index a238da962e..15412d7dd9 100644
--- a/testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js
+++ b/testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js
@@ -10,6 +10,7 @@ function* f1(): I1 {
 
 
 //// [generatorReturnTypeIndirectReferenceToGlobalType.js]
+"use strict";
 function* f1() {
     const a = yield 0;
     return 1;
diff --git a/testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js.diff b/testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js.diff
deleted file mode 100644
index d9eb5cf57f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/generatorReturnTypeIndirectReferenceToGlobalType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.generatorReturnTypeIndirectReferenceToGlobalType.js
-+++ new.generatorReturnTypeIndirectReferenceToGlobalType.js
-@@= skipped -9, +9 lines =@@
-
-
- //// [generatorReturnTypeIndirectReferenceToGlobalType.js]
--"use strict";
- function* f1() {
-     const a = yield 0;
-     return 1;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js b/testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js
index f0daac3a3b..546b30a217 100644
--- a/testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js
+++ b/testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js
@@ -53,6 +53,7 @@ const fn: fn = a => a;
 
 
 //// [genericContextualTypes1.js]
+"use strict";
 const f00 = list;
 const f01 = x => [x];
 const f02 = wrap(list);
diff --git a/testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js.diff b/testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js.diff
deleted file mode 100644
index df75cc05c9..0000000000
--- a/testdata/baselines/reference/submodule/conformance/genericContextualTypes1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericContextualTypes1.js
-+++ new.genericContextualTypes1.js
-@@= skipped -52, +52 lines =@@
-
-
- //// [genericContextualTypes1.js]
--"use strict";
- const f00 = list;
- const f01 = x => [x];
- const f02 = wrap(list);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js b/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js
index 193a39a7cb..b053dbb346 100644
--- a/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js
+++ b/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js
@@ -16,6 +16,7 @@ const x = s(a => a.init());  // x is any, should have been {}
 
 
 //// [genericFunctionParameters.js]
+"use strict";
 let x1 = f1(x => x); // {}
 let x2 = f2(x => x); // number
 let x3 = f3(x => x); // Array<any>
diff --git a/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js.diff b/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js.diff
index 934e9ec96a..19e8ced837 100644
--- a/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/genericFunctionParameters.js.diff
@@ -1,14 +1,6 @@
 --- old.genericFunctionParameters.js
 +++ new.genericFunctionParameters.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [genericFunctionParameters.js]
--"use strict";
- let x1 = f1(x => x); // {}
- let x2 = f2(x => x); // number
- let x3 = f3(x => x); // Array<any>
-@@= skipped -13, +12 lines =@@
+@@= skipped -28, +28 lines =@@
  declare function f3<T>(cb: <S extends Array<S>>(x: S) => T): T;
  declare let x1: unknown;
  declare let x2: number;
diff --git a/testdata/baselines/reference/submodule/conformance/genericObjectRest.js b/testdata/baselines/reference/submodule/conformance/genericObjectRest.js
index 4c7703eb1e..de035efb7b 100644
--- a/testdata/baselines/reference/submodule/conformance/genericObjectRest.js
+++ b/testdata/baselines/reference/submodule/conformance/genericObjectRest.js
@@ -31,6 +31,7 @@ function f4<K1 extends keyof Item, K2 extends keyof Item>(obj: Item, k1: K1, k2:
 
 
 //// [genericObjectRest.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/conformance/genericObjectRest.js.diff b/testdata/baselines/reference/submodule/conformance/genericObjectRest.js.diff
deleted file mode 100644
index 8ac5ef17d1..0000000000
--- a/testdata/baselines/reference/submodule/conformance/genericObjectRest.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericObjectRest.js
-+++ new.genericObjectRest.js
-@@= skipped -30, +30 lines =@@
-
-
- //// [genericObjectRest.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js b/testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js
index e2dbdbd8e0..0e21c43573 100644
--- a/testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js
+++ b/testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js
@@ -12,6 +12,7 @@ call((x: number, y: number) => x + y, 1, 2, 3, 4, 5, 6, 7);
 
 
 //// [genericRestArityStrict.js]
+"use strict";
 // Repro from #25559
 call((x, y) => x + y);
 call((x, y) => x + y, 1, 2, 3, 4, 5, 6, 7);
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js.diff b/testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js.diff
deleted file mode 100644
index f3708c74df..0000000000
--- a/testdata/baselines/reference/submodule/conformance/genericRestArityStrict.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericRestArityStrict.js
-+++ new.genericRestArityStrict.js
-@@= skipped -11, +11 lines =@@
-
-
- //// [genericRestArityStrict.js]
--"use strict";
- // Repro from #25559
- call((x, y) => x + y);
- call((x, y) => x + y, 1, 2, 3, 4, 5, 6, 7);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestParameters1.js b/testdata/baselines/reference/submodule/conformance/genericRestParameters1.js
index c526513ad6..0422f21749 100644
--- a/testdata/baselines/reference/submodule/conformance/genericRestParameters1.js
+++ b/testdata/baselines/reference/submodule/conformance/genericRestParameters1.js
@@ -168,6 +168,7 @@ ff1 = ff4;  // Error
 
 
 //// [genericRestParameters1.js]
+"use strict";
 f1 = f2;
 f2 = f1;
 f1(42, "hello", true);
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestParameters1.js.diff b/testdata/baselines/reference/submodule/conformance/genericRestParameters1.js.diff
deleted file mode 100644
index 73a6887d86..0000000000
--- a/testdata/baselines/reference/submodule/conformance/genericRestParameters1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericRestParameters1.js
-+++ new.genericRestParameters1.js
-@@= skipped -167, +167 lines =@@
-
-
- //// [genericRestParameters1.js]
--"use strict";
- f1 = f2;
- f2 = f1;
- f1(42, "hello", true);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestParameters2.js b/testdata/baselines/reference/submodule/conformance/genericRestParameters2.js
index e04259232a..a06eb34135 100644
--- a/testdata/baselines/reference/submodule/conformance/genericRestParameters2.js
+++ b/testdata/baselines/reference/submodule/conformance/genericRestParameters2.js
@@ -82,6 +82,7 @@ type T12 = P1<(x: number, y: number) => void>;
 
 
 //// [genericRestParameters2.js]
+"use strict";
 f10(42, "hello");
 f10(42, "hello", true);
 f10(42, "hello", true, false);
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestParameters2.js.diff b/testdata/baselines/reference/submodule/conformance/genericRestParameters2.js.diff
deleted file mode 100644
index a981febb87..0000000000
--- a/testdata/baselines/reference/submodule/conformance/genericRestParameters2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericRestParameters2.js
-+++ new.genericRestParameters2.js
-@@= skipped -81, +81 lines =@@
-
-
- //// [genericRestParameters2.js]
--"use strict";
- f10(42, "hello");
- f10(42, "hello", true);
- f10(42, "hello", true, false);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestParameters3.js b/testdata/baselines/reference/submodule/conformance/genericRestParameters3.js
index cbd418bb09..a185cd5c39 100644
--- a/testdata/baselines/reference/submodule/conformance/genericRestParameters3.js
+++ b/testdata/baselines/reference/submodule/conformance/genericRestParameters3.js
@@ -88,6 +88,7 @@ function ff3<A extends unknown[]>(s1: (...args: [x: string, ...rest: A | [number
 
 
 //// [genericRestParameters3.js]
+"use strict";
 f1("foo", "abc");
 f1("foo", 10, true);
 f1("foo", ...t1);
diff --git a/testdata/baselines/reference/submodule/conformance/genericRestParameters3.js.diff b/testdata/baselines/reference/submodule/conformance/genericRestParameters3.js.diff
deleted file mode 100644
index 39401eb41e..0000000000
--- a/testdata/baselines/reference/submodule/conformance/genericRestParameters3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.genericRestParameters3.js
-+++ new.genericRestParameters3.js
-@@= skipped -87, +87 lines =@@
-
-
- //// [genericRestParameters3.js]
--"use strict";
- f1("foo", "abc");
- f1("foo", 10, true);
- f1("foo", ...t1);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js b/testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js
index 3238d41be0..2d6df87607 100644
--- a/testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js
+++ b/testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js
@@ -10,5 +10,6 @@ x === y;
 
 
 //// [independentPropertyVariance.js]
+"use strict";
 // Verify that properties can vary independently in comparable relationship
 x === y;
diff --git a/testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js.diff b/testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js.diff
deleted file mode 100644
index f40819ce4e..0000000000
--- a/testdata/baselines/reference/submodule/conformance/independentPropertyVariance.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.independentPropertyVariance.js
-+++ new.independentPropertyVariance.js
-@@= skipped -9, +9 lines =@@
-
-
- //// [independentPropertyVariance.js]
--"use strict";
- // Verify that properties can vary independently in comparable relationship
- x === y;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/indexSignatures1.js b/testdata/baselines/reference/submodule/conformance/indexSignatures1.js
index 7d52d811fe..17a227841a 100644
--- a/testdata/baselines/reference/submodule/conformance/indexSignatures1.js
+++ b/testdata/baselines/reference/submodule/conformance/indexSignatures1.js
@@ -325,6 +325,7 @@ type K2 = keyof Rec2;  // Id
 
 
 //// [indexSignatures1.js]
+"use strict";
 // Symbol index signature checking
 const sym = Symbol();
 function gg3(x, y, z) {
diff --git a/testdata/baselines/reference/submodule/conformance/indexSignatures1.js.diff b/testdata/baselines/reference/submodule/conformance/indexSignatures1.js.diff
deleted file mode 100644
index 4ac8114e89..0000000000
--- a/testdata/baselines/reference/submodule/conformance/indexSignatures1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.indexSignatures1.js
-+++ new.indexSignatures1.js
-@@= skipped -324, +324 lines =@@
-
-
- //// [indexSignatures1.js]
--"use strict";
- // Symbol index signature checking
- const sym = Symbol();
- function gg3(x, y, z) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js b/testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js
index 51d0fc5d59..b7ec625f7f 100644
--- a/testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js
+++ b/testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js
@@ -46,6 +46,7 @@ const [isAny] = makeTuple(stringy());  // [string]
 
 
 //// [inferFromBindingPattern.js]
+"use strict";
 let x1 = f1(); // string
 let [x2] = f2(); // string
 let { x: x3 } = f3(); // string
diff --git a/testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js.diff b/testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js.diff
deleted file mode 100644
index db5f4fe21a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/inferFromBindingPattern.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.inferFromBindingPattern.js
-+++ new.inferFromBindingPattern.js
-@@= skipped -45, +45 lines =@@
-
-
- //// [inferFromBindingPattern.js]
--"use strict";
- let x1 = f1(); // string
- let [x2] = f2(); // string
- let { x: x3 } = f3(); // string
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/inferTypes1.js b/testdata/baselines/reference/submodule/conformance/inferTypes1.js
index ea87fbf992..3f3cc10fd8 100644
--- a/testdata/baselines/reference/submodule/conformance/inferTypes1.js
+++ b/testdata/baselines/reference/submodule/conformance/inferTypes1.js
@@ -190,6 +190,7 @@ type Foo2<A extends any[]> = ReturnType<(...args: A) => string>;
 
 
 //// [inferTypes1.js]
+"use strict";
 function f1(s) {
     return { a: 1, b: s };
 }
diff --git a/testdata/baselines/reference/submodule/conformance/inferTypes1.js.diff b/testdata/baselines/reference/submodule/conformance/inferTypes1.js.diff
index b263435cc4..1a255fdc1a 100644
--- a/testdata/baselines/reference/submodule/conformance/inferTypes1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/inferTypes1.js.diff
@@ -1,11 +1,6 @@
 --- old.inferTypes1.js
 +++ new.inferTypes1.js
-@@= skipped -189, +189 lines =@@
-
-
- //// [inferTypes1.js]
--"use strict";
- function f1(s) {
+@@= skipped -194, +194 lines =@@
      return { a: 1, b: s };
  }
  class C {
diff --git a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js b/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js
index 7ef823472b..983b757b62 100644
--- a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js
+++ b/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js
@@ -138,6 +138,7 @@ function f2() {
 }
 
 //// [inferTypesWithExtends1.js]
+"use strict";
 function f1() {
     return x1;
 }
diff --git a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js.diff b/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js.diff
index 395838fe7b..500c12f4cf 100644
--- a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends1.js.diff
@@ -1,14 +1,6 @@
 --- old.inferTypesWithExtends1.js
 +++ new.inferTypesWithExtends1.js
-@@= skipped -137, +137 lines =@@
- }
-
- //// [inferTypesWithExtends1.js]
--"use strict";
- function f1() {
-     return x1;
- }
-@@= skipped -129, +128 lines =@@
+@@= skipped -266, +266 lines =@@
  type X11<T> = T extends ((infer U) extends number ? 1 : 0) ? 1 : 0;
  type X12<T> = T extends (infer U extends number) ? 1 : 0;
  type X13<T> = T extends infer U extends number ? 1 : 0;
diff --git a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js b/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js
index cc2b0c6008..b42b5cf9d1 100644
--- a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js
+++ b/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js
@@ -12,3 +12,4 @@ type X2<T> =
     never;
 
 //// [inferTypesWithExtends2.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js.diff b/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js.diff
deleted file mode 100644
index 97d7e0b1ab..0000000000
--- a/testdata/baselines/reference/submodule/conformance/inferTypesWithExtends2.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.inferTypesWithExtends2.js
-+++ new.inferTypesWithExtends2.js
-@@= skipped -11, +11 lines =@@
-     never;
-
- //// [inferTypesWithExtends2.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js b/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js
index 191c6e99f2..63d97f59e5 100644
--- a/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js
+++ b/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js
@@ -107,6 +107,7 @@ const a = ver < (MyVer.v1 >= MyVer.v2 ? MyVer.v1 : MyVer.v2)
 
 
 //// [instantiationExpressionErrors.js]
+"use strict";
 var _a, _b;
 var _c;
 // Type arguments in member expressions
diff --git a/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js.diff b/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js.diff
index 93a49ac00e..547abaffc3 100644
--- a/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/instantiationExpressionErrors.js.diff
@@ -1,10 +1,9 @@
 --- old.instantiationExpressionErrors.js
 +++ new.instantiationExpressionErrors.js
-@@= skipped -106, +106 lines =@@
-
+@@= skipped -107, +107 lines =@@
 
  //// [instantiationExpressionErrors.js]
--"use strict";
+ "use strict";
 -var _a, _b, _c;
 +var _a, _b;
 +var _c;
@@ -41,7 +40,7 @@
  // Parsed as function call, even though this differs from JavaScript
  const x1 = f(true);
  // Parsed as relational expressions
-@@= skipped -29, +29 lines =@@
+@@= skipped -28, +29 lines =@@
  const r2 = f < true > +1;
  const r3 = f < true > -1;
  // All of the following are parsed as instantiation expressions
diff --git a/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js b/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js
index 6b4cad516b..bd4ac420fa 100644
--- a/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js
+++ b/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js
@@ -176,6 +176,7 @@ type T51<U extends number> = typeof g3<U, any>;  // (b: U) => U
 
 
 //// [instantiationExpressions.js]
+"use strict";
 function f1() {
     let f0 = fx; // Error
     let f1 = fx; // { (x: string): string; (x: string, n: number): string; }
diff --git a/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js.diff b/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js.diff
index e1cc4afbe1..2df4db9aa5 100644
--- a/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/instantiationExpressions.js.diff
@@ -1,10 +1,7 @@
 --- old.instantiationExpressions.js
 +++ new.instantiationExpressions.js
-@@= skipped -175, +175 lines =@@
-
-
- //// [instantiationExpressions.js]
--"use strict";
+@@= skipped -178, +178 lines =@@
+ "use strict";
  function f1() {
      let f0 = fx; // Error
 -    let f1 = (fx); // { (x: string): string; (x: string, n: number): string; }
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js b/testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js
index cf2ff0f781..7b23c6da8d 100644
--- a/testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js
+++ b/testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js
@@ -41,6 +41,7 @@ function f5<T extends string | number>(x: T & number) {
 
 
 //// [intersectionNarrowing.js]
+"use strict";
 // Repros from #43130
 function f1(x) {
     if (x) {
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js.diff b/testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js.diff
deleted file mode 100644
index 5878005a7b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intersectionNarrowing.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionNarrowing.js
-+++ new.intersectionNarrowing.js
-@@= skipped -40, +40 lines =@@
-
-
- //// [intersectionNarrowing.js]
--"use strict";
- // Repros from #43130
- function f1(x) {
-     if (x) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js b/testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js
index 8e3359fb89..249f3ede41 100644
--- a/testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js
+++ b/testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js
@@ -18,6 +18,7 @@ if (q.a !== undefined) {
 
 
 //// [intersectionOfUnionNarrowing.js]
+"use strict";
 if (q.a !== undefined) {
     q.a.aProp;
 }
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js.diff b/testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js.diff
deleted file mode 100644
index 8d96a0058f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intersectionOfUnionNarrowing.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionOfUnionNarrowing.js
-+++ new.intersectionOfUnionNarrowing.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [intersectionOfUnionNarrowing.js]
--"use strict";
- if (q.a !== undefined) {
-     q.a.aProp;
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js b/testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js
index 4cfd5701eb..783605bc76 100644
--- a/testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js
+++ b/testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js
@@ -101,6 +101,7 @@ const f4 = (t: number | (Container<"b"> & { dataB: boolean } & Container<"a">)):
 
 
 //// [intersectionReductionStrict.js]
+"use strict";
 ab.kind; // Error
 let a = x;
 // Repro from #31663
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js.diff b/testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js.diff
deleted file mode 100644
index 1c25ba4b36..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intersectionReductionStrict.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionReductionStrict.js
-+++ new.intersectionReductionStrict.js
-@@= skipped -100, +100 lines =@@
-
-
- //// [intersectionReductionStrict.js]
--"use strict";
- ab.kind; // Error
- let a = x;
- // Repro from #31663
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js b/testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js
index 233f395d0d..4c83b29125 100644
--- a/testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js
+++ b/testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js
@@ -21,6 +21,7 @@ const c2: ReadonlyArray<A> = from();
 
 
 //// [intersectionTypeInference3.js]
+"use strict";
 // Repro from #19682
 const c1 = Array.from(a).concat(Array.from(b));
 const c2 = from();
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js.diff b/testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js.diff
deleted file mode 100644
index ff9b2e115a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intersectionTypeInference3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionTypeInference3.js
-+++ new.intersectionTypeInference3.js
-@@= skipped -20, +20 lines =@@
-
-
- //// [intersectionTypeInference3.js]
--"use strict";
- // Repro from #19682
- const c1 = Array.from(a).concat(Array.from(b));
- const c2 = from();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js b/testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js
index 2980e6b457..479ff51b2d 100644
--- a/testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js
+++ b/testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js
@@ -39,6 +39,7 @@ tt = ss;  // Error
 
 
 //// [intersectionWithIndexSignatures.js]
+"use strict";
 ta1 = sa1;
 ta1 = sa2;
 ta2 = sa1;
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js.diff b/testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js.diff
deleted file mode 100644
index a7a4f37e61..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intersectionWithIndexSignatures.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionWithIndexSignatures.js
-+++ new.intersectionWithIndexSignatures.js
-@@= skipped -38, +38 lines =@@
-
-
- //// [intersectionWithIndexSignatures.js]
--"use strict";
- ta1 = sa1;
- ta1 = sa2;
- ta2 = sa1;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js b/testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js
index fd448e2f9e..7e7a262657 100644
--- a/testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js
+++ b/testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js
@@ -43,6 +43,7 @@ type b<T> = { [K in a<T> & keyof T ]: 42 };
 
 
 //// [intersectionWithUnionConstraint.js]
+"use strict";
 function f1(x) {
     // Combined constraint of 'T & U' is 'string | number'
     let y = x;
diff --git a/testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js.diff b/testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js.diff
deleted file mode 100644
index bff2c3549b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intersectionWithUnionConstraint.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intersectionWithUnionConstraint.js
-+++ new.intersectionWithUnionConstraint.js
-@@= skipped -42, +42 lines =@@
-
-
- //// [intersectionWithUnionConstraint.js]
--"use strict";
- function f1(x) {
-     // Combined constraint of 'T & U' is 'string | number'
-     let y = x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js
index aae01a4eb5..0182294b85 100644
--- a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js
+++ b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js
@@ -27,6 +27,7 @@ const types: Intl.NumberFormatPartTypes[] = [ 'compact', 'unit', 'unknown' ];
 
 
 //// [intlNumberFormatES2020.js]
+"use strict";
 // New/updated resolved options in ES2020
 const { notation, style, signDisplay } = new Intl.NumberFormat('en-NZ').resolvedOptions();
 // Empty options
diff --git a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js.diff b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js.diff
deleted file mode 100644
index 4e67f9b5c5..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2020.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intlNumberFormatES2020.js
-+++ new.intlNumberFormatES2020.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [intlNumberFormatES2020.js]
--"use strict";
- // New/updated resolved options in ES2020
- const { notation, style, signDisplay } = new Intl.NumberFormat('en-NZ').resolvedOptions();
- // Empty options
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js
index de03f48ba2..983fe0ff00 100644
--- a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js
+++ b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js
@@ -34,6 +34,7 @@ new Intl.NumberFormat('en-GB').format('+Infinity');
 
 
 //// [intlNumberFormatES2023.js]
+"use strict";
 // New / updated resolved options in ES2023, including type change for useGrouping
 const { roundingPriority, roundingMode, roundingIncrement, trailingZeroDisplay, useGrouping } = new Intl.NumberFormat('en-GB').resolvedOptions();
 // Empty options
diff --git a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js.diff b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js.diff
deleted file mode 100644
index 7844d40be5..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES2023.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intlNumberFormatES2023.js
-+++ new.intlNumberFormatES2023.js
-@@= skipped -33, +33 lines =@@
-
-
- //// [intlNumberFormatES2023.js]
--"use strict";
- // New / updated resolved options in ES2023, including type change for useGrouping
- const { roundingPriority, roundingMode, roundingIncrement, trailingZeroDisplay, useGrouping } = new Intl.NumberFormat('en-GB').resolvedOptions();
- // Empty options
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js
index fed2207938..387d5779c2 100644
--- a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js
+++ b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js
@@ -9,6 +9,7 @@ const { useGrouping } = new Intl.NumberFormat('en-GB').resolvedOptions();
 
 
 //// [intlNumberFormatES5UseGrouping.js]
+"use strict";
 new Intl.NumberFormat('en-GB', { useGrouping: true });
 new Intl.NumberFormat('en-GB', { useGrouping: 'true' }); // expect error
 new Intl.NumberFormat('en-GB', { useGrouping: 'always' }); // expect error
diff --git a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js.diff b/testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js.diff
deleted file mode 100644
index 84fb7446fa..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intlNumberFormatES5UseGrouping.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intlNumberFormatES5UseGrouping.js
-+++ new.intlNumberFormatES5UseGrouping.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [intlNumberFormatES5UseGrouping.js]
--"use strict";
- new Intl.NumberFormat('en-GB', { useGrouping: true });
- new Intl.NumberFormat('en-GB', { useGrouping: 'true' }); // expect error
- new Intl.NumberFormat('en-GB', { useGrouping: 'always' }); // expect error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js b/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js
index 6464b531b7..b2f3845e5c 100644
--- a/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js
+++ b/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js
@@ -334,6 +334,7 @@ const distantRes = distant({
 
 
 //// [intraExpressionInferences.js]
+"use strict";
 // Repros from #47599
 callIt({
     produce: () => 0,
diff --git a/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js.diff b/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js.diff
index 12c6c5e26e..1c51dbaa8e 100644
--- a/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/intraExpressionInferences.js.diff
@@ -1,14 +1,6 @@
 --- old.intraExpressionInferences.js
 +++ new.intraExpressionInferences.js
-@@= skipped -333, +333 lines =@@
-
-
- //// [intraExpressionInferences.js]
--"use strict";
- // Repros from #47599
- callIt({
-     produce: () => 0,
-@@= skipped -60, +59 lines =@@
+@@= skipped -393, +393 lines =@@
  });
  // Repro from #41712
  class Wrapper {
diff --git a/testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js b/testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js
index b4d34e8ec5..b1bcd17b34 100644
--- a/testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js
+++ b/testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js
@@ -24,6 +24,7 @@ function f3() {
 
 
 //// [intrinsicKeyword.js]
+"use strict";
 let e1;
 let e2;
 function f1() {
diff --git a/testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js.diff b/testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js.diff
deleted file mode 100644
index 05e1ae516c..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intrinsicKeyword.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intrinsicKeyword.js
-+++ new.intrinsicKeyword.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [intrinsicKeyword.js]
--"use strict";
- let e1;
- let e2;
- function f1() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/intrinsicTypes.js b/testdata/baselines/reference/submodule/conformance/intrinsicTypes.js
index 1bbcc3b0f5..3c18cf5e62 100644
--- a/testdata/baselines/reference/submodule/conformance/intrinsicTypes.js
+++ b/testdata/baselines/reference/submodule/conformance/intrinsicTypes.js
@@ -58,6 +58,7 @@ function foo4<U extends string>(x: Uppercase<U>) {
 
 
 //// [intrinsicTypes.js]
+"use strict";
 function foo1(s, x, y) {
     s = x;
     s = y;
diff --git a/testdata/baselines/reference/submodule/conformance/intrinsicTypes.js.diff b/testdata/baselines/reference/submodule/conformance/intrinsicTypes.js.diff
deleted file mode 100644
index 569ebc4234..0000000000
--- a/testdata/baselines/reference/submodule/conformance/intrinsicTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.intrinsicTypes.js
-+++ new.intrinsicTypes.js
-@@= skipped -57, +57 lines =@@
-
-
- //// [intrinsicTypes.js]
--"use strict";
- function foo1(s, x, y) {
-     s = x;
-     s = y;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js b/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js
index 87c4e10075..2e1a63d7b4 100644
--- a/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js
+++ b/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js
@@ -33,6 +33,7 @@
 /** @type {event} */const q = undefined;
 
 //// [index.js]
+"use strict";
 // these are recognized as TS concepts by the checker
 /** @type {String} */ const a = "";
 /** @type {Number} */ const b = 0;
diff --git a/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js.diff b/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js.diff
index 1ab09b0371..cfa6e255a3 100644
--- a/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/jsDeclarationsJSDocRedirectedLookups.js.diff
@@ -1,14 +1,6 @@
 --- old.jsDeclarationsJSDocRedirectedLookups.js
 +++ new.jsDeclarationsJSDocRedirectedLookups.js
-@@= skipped -32, +32 lines =@@
- /** @type {event} */const q = undefined;
-
- //// [index.js]
--"use strict";
- // these are recognized as TS concepts by the checker
- /** @type {String} */ const a = "";
- /** @type {Number} */ const b = 0;
-@@= skipped -30, +29 lines =@@
+@@= skipped -62, +62 lines =@@
 
 
  //// [index.d.ts]
diff --git a/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js b/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js
index 2857fdb4db..f47a59f1c7 100644
--- a/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js
+++ b/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js
@@ -17,6 +17,7 @@ function foo({ a, b, c }) {
 
 
 //// [foo.js]
+"use strict";
 /**
  * foo
  *
diff --git a/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js.diff b/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js.diff
index 0ce22c269d..e335c7c7a7 100644
--- a/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/jsDeclarationsOptionalTypeLiteralProps2.js.diff
@@ -1,14 +1,6 @@
 --- old.jsDeclarationsOptionalTypeLiteralProps2.js
 +++ new.jsDeclarationsOptionalTypeLiteralProps2.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [foo.js]
--"use strict";
- /**
-  * foo
-  *
-@@= skipped -29, +28 lines =@@
+@@= skipped -45, +45 lines =@@
   */
  declare function foo({ a, b, c }: {
      a: number;
diff --git a/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js b/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js
index 7ec2b35672..fcdcdb2c4a 100644
--- a/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js
+++ b/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js
@@ -105,6 +105,7 @@ class С4 {
 
 
 //// [index.js]
+"use strict";
 class С1 {
     /** @type {string=} */
     p1 = undefined;
diff --git a/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js.diff b/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js.diff
index 5b0182ef60..66c79f2598 100644
--- a/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/jsDeclarationsReusesExistingTypeAnnotations.js.diff
@@ -1,14 +1,6 @@
 --- old.jsDeclarationsReusesExistingTypeAnnotations.js
 +++ new.jsDeclarationsReusesExistingTypeAnnotations.js
-@@= skipped -104, +104 lines =@@
-
-
- //// [index.js]
--"use strict";
- class С1 {
-     /** @type {string=} */
-     p1 = undefined;
-@@= skipped -96, +95 lines =@@
+@@= skipped -200, +200 lines =@@
  }
  declare class С2 {
      /** @type {string=} */
diff --git a/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js b/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js
index 86e4c9d447..95fd6dd658 100644
--- a/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js
+++ b/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js
@@ -27,6 +27,7 @@ var anys: Array<*>;
 
 
 //// [jsdocDisallowedInTypescript.js]
+"use strict";
 // grammar error from checker
 var ara = [1, 2, 3];
 function f(x, y) {
diff --git a/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js.diff b/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js.diff
index 9d4dc8a674..70a387ea25 100644
--- a/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/jsdocDisallowedInTypescript.js.diff
@@ -1,12 +1,6 @@
 --- old.jsdocDisallowedInTypescript.js
 +++ new.jsdocDisallowedInTypescript.js
-@@= skipped -26, +26 lines =@@
-
-
- //// [jsdocDisallowedInTypescript.js]
--"use strict";
- // grammar error from checker
- var ara = [1, 2, 3];
+@@= skipped -32, +32 lines =@@
  function f(x, y) {
      return x ? x + y[1] : y[0];
  }
diff --git a/testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js b/testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js
index 269d280ca4..5cf4b1d0fc 100644
--- a/testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js
+++ b/testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js
@@ -18,5 +18,6 @@ const b = (
 
 
 //// [a.js]
+"use strict";
 const a = (React.createElement("public-foo", null));
 const b = (React.createElement("public", null));
diff --git a/testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js.diff b/testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js.diff
deleted file mode 100644
index 08fa522568..0000000000
--- a/testdata/baselines/reference/submodule/conformance/jsxParsingError4(strict=true).js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.jsxParsingError4(strict=true).js
-+++ new.jsxParsingError4(strict=true).js
-@@= skipped -17, +17 lines =@@
-
-
- //// [a.js]
--"use strict";
- const a = (React.createElement("public-foo", null));
- const b = (React.createElement("public", null));
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/keyofIntersection.js b/testdata/baselines/reference/submodule/conformance/keyofIntersection.js
index 8b24c1043a..a738b0c8e2 100644
--- a/testdata/baselines/reference/submodule/conformance/keyofIntersection.js
+++ b/testdata/baselines/reference/submodule/conformance/keyofIntersection.js
@@ -30,6 +30,7 @@ type Result5 = Example5<Record<'x', any>, Record<'y', any>>;  // "x" | "y"
 
 
 //// [keyofIntersection.js]
+"use strict";
 
 
 //// [keyofIntersection.d.ts]
diff --git a/testdata/baselines/reference/submodule/conformance/keyofIntersection.js.diff b/testdata/baselines/reference/submodule/conformance/keyofIntersection.js.diff
deleted file mode 100644
index 0bc1a0c230..0000000000
--- a/testdata/baselines/reference/submodule/conformance/keyofIntersection.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.keyofIntersection.js
-+++ new.keyofIntersection.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [keyofIntersection.js]
--"use strict";
-
-
- //// [keyofIntersection.d.ts]
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js b/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js
index b837c9a019..bed566f3cc 100644
--- a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js
+++ b/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js
@@ -9,6 +9,7 @@ for (let x of []) {
 
 
 //// [labeledStatementDeclarationListInLoopNoCrash1.js]
+"use strict";
 for (let x of []) {
     var v0 = x;
     foo: var ;
diff --git a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js.diff b/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js.diff
deleted file mode 100644
index 32c628d2ac..0000000000
--- a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.labeledStatementDeclarationListInLoopNoCrash1.js
-+++ new.labeledStatementDeclarationListInLoopNoCrash1.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [labeledStatementDeclarationListInLoopNoCrash1.js]
--"use strict";
- for (let x of []) {
-     var v0 = x;
-     foo: var ;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js b/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js
index ad18c2afc2..5b1591b212 100644
--- a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js
+++ b/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js
@@ -9,6 +9,7 @@ for (let x of []) {
 
 
 //// [labeledStatementDeclarationListInLoopNoCrash2.js]
+"use strict";
 for (let x of []) {
     var v0 = x;
     foo: var y;
diff --git a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js.diff b/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js.diff
deleted file mode 100644
index 66dca2c21a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/labeledStatementDeclarationListInLoopNoCrash2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.labeledStatementDeclarationListInLoopNoCrash2.js
-+++ new.labeledStatementDeclarationListInLoopNoCrash2.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [labeledStatementDeclarationListInLoopNoCrash2.js]
--"use strict";
- for (let x of []) {
-     var v0 = x;
-     foo: var y;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js b/testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js
index e12d2c9685..08ec71abff 100644
--- a/testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js
+++ b/testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js
@@ -25,6 +25,7 @@ bar;  // "yo" | "ha"
 
 
 //// [literalTypesAndDestructuring.js]
+"use strict";
 var _a, _b, _c;
 let { a: a1 } = x;
 let { a: a2 = 0 } = x;
diff --git a/testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js.diff b/testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js.diff
deleted file mode 100644
index acf6754f98..0000000000
--- a/testdata/baselines/reference/submodule/conformance/literalTypesAndDestructuring.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.literalTypesAndDestructuring.js
-+++ new.literalTypesAndDestructuring.js
-@@= skipped -24, +24 lines =@@
-
-
- //// [literalTypesAndDestructuring.js]
--"use strict";
- var _a, _b, _c;
- let { a: a1 } = x;
- let { a: a2 = 0 } = x;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js
index 3f5926efe6..6bc2147c40 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js
@@ -29,6 +29,7 @@ i ??= 42
 
 
 //// [logicalAssignment1.js]
+"use strict";
 a && (a = "foo");
 b || (b = "foo");
 c !== null && c !== void 0 ? c : (c = "foo");
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js.diff
deleted file mode 100644
index 33adf71e79..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment1(target=es2015).js
-+++ new.logicalAssignment1(target=es2015).js
-@@= skipped -28, +28 lines =@@
-
-
- //// [logicalAssignment1.js]
--"use strict";
- a && (a = "foo");
- b || (b = "foo");
- c !== null && c !== void 0 ? c : (c = "foo");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js
index bc6899142f..e3f8e63f07 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js
@@ -29,6 +29,7 @@ i ??= 42
 
 
 //// [logicalAssignment1.js]
+"use strict";
 a && (a = "foo");
 b || (b = "foo");
 c ?? (c = "foo");
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js.diff
deleted file mode 100644
index ae2f2a76e5..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment1(target=es2020).js
-+++ new.logicalAssignment1(target=es2020).js
-@@= skipped -28, +28 lines =@@
-
-
- //// [logicalAssignment1.js]
--"use strict";
- a && (a = "foo");
- b || (b = "foo");
- c ?? (c = "foo");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js
index 64000ba98f..7d3d186609 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js
@@ -29,6 +29,7 @@ i ??= 42
 
 
 //// [logicalAssignment1.js]
+"use strict";
 a &&= "foo";
 b ||= "foo";
 c ??= "foo";
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js.diff
deleted file mode 100644
index 54e6f8b17d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment1(target=es2021).js
-+++ new.logicalAssignment1(target=es2021).js
-@@= skipped -28, +28 lines =@@
-
-
- //// [logicalAssignment1.js]
--"use strict";
- a &&= "foo";
- b ||= "foo";
- c ??= "foo";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js
index 64000ba98f..7d3d186609 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js
@@ -29,6 +29,7 @@ i ??= 42
 
 
 //// [logicalAssignment1.js]
+"use strict";
 a &&= "foo";
 b ||= "foo";
 c ??= "foo";
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js.diff
deleted file mode 100644
index 492f007db3..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment1(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment1(target=esnext).js
-+++ new.logicalAssignment1(target=esnext).js
-@@= skipped -28, +28 lines =@@
-
-
- //// [logicalAssignment1.js]
--"use strict";
- a &&= "foo";
- b ||= "foo";
- c ??= "foo";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js
index 15d686359d..fa4c664959 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js
@@ -12,6 +12,7 @@ e ??= x ?? "x"
 e.length
 
 //// [logicalAssignment11.js]
+"use strict";
 let x;
 let d;
 d !== null && d !== void 0 ? d : (d = x !== null && x !== void 0 ? x : "x");
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js.diff
deleted file mode 100644
index f3477561af..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment11(target=es2015).js
-+++ new.logicalAssignment11(target=es2015).js
-@@= skipped -11, +11 lines =@@
- e.length
-
- //// [logicalAssignment11.js]
--"use strict";
- let x;
- let d;
- d !== null && d !== void 0 ? d : (d = x !== null && x !== void 0 ? x : "x");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js
index da1c768c52..e312982dfe 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js
@@ -12,6 +12,7 @@ e ??= x ?? "x"
 e.length
 
 //// [logicalAssignment11.js]
+"use strict";
 let x;
 let d;
 d ?? (d = x ?? "x");
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js.diff
deleted file mode 100644
index affbcdc85d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment11(target=es2020).js
-+++ new.logicalAssignment11(target=es2020).js
-@@= skipped -11, +11 lines =@@
- e.length
-
- //// [logicalAssignment11.js]
--"use strict";
- let x;
- let d;
- d ?? (d = x ?? "x");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js
index 7254fd59c1..53e79cd32e 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js
@@ -12,6 +12,7 @@ e ??= x ?? "x"
 e.length
 
 //// [logicalAssignment11.js]
+"use strict";
 let x;
 let d;
 d ?? (d = x ?? "x");
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js.diff
deleted file mode 100644
index af1d33428c..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment11(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment11(target=esnext).js
-+++ new.logicalAssignment11(target=esnext).js
-@@= skipped -11, +11 lines =@@
- e.length
-
- //// [logicalAssignment11.js]
--"use strict";
- let x;
- let d;
- d ?? (d = x ?? "x");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js
index e315007ef3..418fe6fcfa 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js
@@ -31,6 +31,7 @@ c.foo.bar().baz ??= result.foo.bar().baz
 
 
 //// [logicalAssignment2.js]
+"use strict";
 var _a, _b, _c;
 var _d, _e, _f, _g, _h, _j;
 a.baz && (a.baz = result.baz);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js.diff
deleted file mode 100644
index e23ff1eebc..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment2(target=es2015).js
-+++ new.logicalAssignment2(target=es2015).js
-@@= skipped -30, +30 lines =@@
-
-
- //// [logicalAssignment2.js]
--"use strict";
- var _a, _b, _c;
- var _d, _e, _f, _g, _h, _j;
- a.baz && (a.baz = result.baz);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js
index 0fb8a11863..e9dd72e2be 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js
@@ -31,6 +31,7 @@ c.foo.bar().baz ??= result.foo.bar().baz
 
 
 //// [logicalAssignment2.js]
+"use strict";
 var _a, _b, _c, _d, _e, _f;
 a.baz && (a.baz = result.baz);
 b.baz || (b.baz = result.baz);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js.diff
deleted file mode 100644
index 3b84ffa287..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment2(target=es2020).js
-+++ new.logicalAssignment2(target=es2020).js
-@@= skipped -30, +30 lines =@@
-
-
- //// [logicalAssignment2.js]
--"use strict";
- var _a, _b, _c, _d, _e, _f;
- a.baz && (a.baz = result.baz);
- b.baz || (b.baz = result.baz);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js
index b64cdb19da..8e6e9e214e 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js
@@ -31,6 +31,7 @@ c.foo.bar().baz ??= result.foo.bar().baz
 
 
 //// [logicalAssignment2.js]
+"use strict";
 a.baz &&= result.baz;
 b.baz ||= result.baz;
 c.baz ??= result.baz;
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js.diff
deleted file mode 100644
index c97feeb636..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment2(target=es2021).js
-+++ new.logicalAssignment2(target=es2021).js
-@@= skipped -30, +30 lines =@@
-
-
- //// [logicalAssignment2.js]
--"use strict";
- a.baz &&= result.baz;
- b.baz ||= result.baz;
- c.baz ??= result.baz;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js
index b64cdb19da..8e6e9e214e 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js
@@ -31,6 +31,7 @@ c.foo.bar().baz ??= result.foo.bar().baz
 
 
 //// [logicalAssignment2.js]
+"use strict";
 a.baz &&= result.baz;
 b.baz ||= result.baz;
 c.baz ??= result.baz;
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js.diff
deleted file mode 100644
index 56e00309ed..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment2(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment2(target=esnext).js
-+++ new.logicalAssignment2(target=esnext).js
-@@= skipped -30, +30 lines =@@
-
-
- //// [logicalAssignment2.js]
--"use strict";
- a.baz &&= result.baz;
- b.baz ||= result.baz;
- c.baz ??= result.baz;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js
index c57fbb0c7e..01a6df8221 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js
@@ -17,6 +17,7 @@ declare const c: A;
 
 
 //// [logicalAssignment3.js]
+"use strict";
 var _a;
 a.baz && (a.baz = result.baz);
 b.baz || (b.baz = result.baz);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js.diff
deleted file mode 100644
index 9d6e230e79..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment3(target=es2015).js
-+++ new.logicalAssignment3(target=es2015).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment3.js]
--"use strict";
- var _a;
- a.baz && (a.baz = result.baz);
- b.baz || (b.baz = result.baz);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js
index 6a9408c128..7ba677ec49 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js
@@ -17,6 +17,7 @@ declare const c: A;
 
 
 //// [logicalAssignment3.js]
+"use strict";
 a.baz && (a.baz = result.baz);
 b.baz || (b.baz = result.baz);
 c.baz ?? (c.baz = result.baz);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js.diff
deleted file mode 100644
index 0dac0bc7ab..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment3(target=es2020).js
-+++ new.logicalAssignment3(target=es2020).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment3.js]
--"use strict";
- a.baz && (a.baz = result.baz);
- b.baz || (b.baz = result.baz);
- c.baz ?? (c.baz = result.baz);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js
index 16c3850091..c6f928db6f 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js
@@ -17,6 +17,7 @@ declare const c: A;
 
 
 //// [logicalAssignment3.js]
+"use strict";
 (a.baz) &&= result.baz;
 (b.baz) ||= result.baz;
 (c.baz) ??= result.baz;
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js.diff
deleted file mode 100644
index 0ec4f66294..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment3(target=es2021).js
-+++ new.logicalAssignment3(target=es2021).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment3.js]
--"use strict";
- (a.baz) &&= result.baz;
- (b.baz) ||= result.baz;
- (c.baz) ??= result.baz;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js
index 16c3850091..c6f928db6f 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js
@@ -17,6 +17,7 @@ declare const c: A;
 
 
 //// [logicalAssignment3.js]
+"use strict";
 (a.baz) &&= result.baz;
 (b.baz) ||= result.baz;
 (c.baz) ??= result.baz;
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js.diff
deleted file mode 100644
index a900788227..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment3(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment3(target=esnext).js
-+++ new.logicalAssignment3(target=esnext).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment3.js]
--"use strict";
- (a.baz) &&= result.baz;
- (b.baz) ||= result.baz;
- (c.baz) ??= result.baz;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js
index 8c13c19c9c..78a9919604 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js
@@ -52,6 +52,7 @@ function doSomethingWithAlias(thing: ThingWithOriginal | undefined, defaultValue
 
 
 //// [logicalAssignment4.js]
+"use strict";
 function foo1(results) {
     (results || (results = [])).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js.diff
deleted file mode 100644
index 6984c39a14..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment4(target=es2015).js
-+++ new.logicalAssignment4(target=es2015).js
-@@= skipped -51, +51 lines =@@
-
-
- //// [logicalAssignment4.js]
--"use strict";
- function foo1(results) {
-     (results || (results = [])).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js
index 34d8b3d80b..1ea71c49c3 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js
@@ -52,6 +52,7 @@ function doSomethingWithAlias(thing: ThingWithOriginal | undefined, defaultValue
 
 
 //// [logicalAssignment4.js]
+"use strict";
 function foo1(results) {
     (results || (results = [])).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js.diff
deleted file mode 100644
index 3a22ea8fae..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment4(target=es2020).js
-+++ new.logicalAssignment4(target=es2020).js
-@@= skipped -51, +51 lines =@@
-
-
- //// [logicalAssignment4.js]
--"use strict";
- function foo1(results) {
-     (results || (results = [])).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js
index da99f41187..bb66e0322e 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js
@@ -52,6 +52,7 @@ function doSomethingWithAlias(thing: ThingWithOriginal | undefined, defaultValue
 
 
 //// [logicalAssignment4.js]
+"use strict";
 function foo1(results) {
     (results ||= []).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js.diff
deleted file mode 100644
index e9da2bb38b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment4(target=es2021).js
-+++ new.logicalAssignment4(target=es2021).js
-@@= skipped -51, +51 lines =@@
-
-
- //// [logicalAssignment4.js]
--"use strict";
- function foo1(results) {
-     (results ||= []).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js
index da99f41187..bb66e0322e 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js
@@ -52,6 +52,7 @@ function doSomethingWithAlias(thing: ThingWithOriginal | undefined, defaultValue
 
 
 //// [logicalAssignment4.js]
+"use strict";
 function foo1(results) {
     (results ||= []).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js.diff
deleted file mode 100644
index faceaffa05..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment4(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment4(target=esnext).js
-+++ new.logicalAssignment4(target=esnext).js
-@@= skipped -51, +51 lines =@@
-
-
- //// [logicalAssignment4.js]
--"use strict";
- function foo1(results) {
-     (results ||= []).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js
index cde0e39dc7..456bdae280 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js
@@ -33,6 +33,7 @@ function bar3 (f?: (a: number) => void) {
 
 
 //// [logicalAssignment5.js]
+"use strict";
 function foo1(f) {
     f !== null && f !== void 0 ? f : (f = a => a);
     f(42);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js.diff
deleted file mode 100644
index 28ccc8f53a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment5(target=es2015).js
-+++ new.logicalAssignment5(target=es2015).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [logicalAssignment5.js]
--"use strict";
- function foo1(f) {
-     f !== null && f !== void 0 ? f : (f = a => a);
-     f(42);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js
index e36e602efc..416198d793 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js
@@ -33,6 +33,7 @@ function bar3 (f?: (a: number) => void) {
 
 
 //// [logicalAssignment5.js]
+"use strict";
 function foo1(f) {
     f ?? (f = a => a);
     f(42);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js.diff
deleted file mode 100644
index 4d5a06a5a3..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment5(target=es2020).js
-+++ new.logicalAssignment5(target=es2020).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [logicalAssignment5.js]
--"use strict";
- function foo1(f) {
-     f ?? (f = a => a);
-     f(42);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js
index 0a6547f004..e05a762e47 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js
@@ -33,6 +33,7 @@ function bar3 (f?: (a: number) => void) {
 
 
 //// [logicalAssignment5.js]
+"use strict";
 function foo1(f) {
     f ??= (a => a);
     f(42);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js.diff
deleted file mode 100644
index ffbbd90bea..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment5(target=es2021).js
-+++ new.logicalAssignment5(target=es2021).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [logicalAssignment5.js]
--"use strict";
- function foo1(f) {
-     f ??= (a => a);
-     f(42);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js
index 0a6547f004..e05a762e47 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js
@@ -33,6 +33,7 @@ function bar3 (f?: (a: number) => void) {
 
 
 //// [logicalAssignment5.js]
+"use strict";
 function foo1(f) {
     f ??= (a => a);
     f(42);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js.diff
deleted file mode 100644
index e335a7d847..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment5(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment5(target=esnext).js
-+++ new.logicalAssignment5(target=esnext).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [logicalAssignment5.js]
--"use strict";
- function foo1(f) {
-     f ??= (a => a);
-     f(42);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js
index 5af758bc1b..f2ac9ab93f 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment6.js]
+"use strict";
 function foo1(results, results1) {
     (results || (results = results1 || (results1 = []))).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js.diff
deleted file mode 100644
index 91c2760e61..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment6(target=es2015).js
-+++ new.logicalAssignment6(target=es2015).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment6.js]
--"use strict";
- function foo1(results, results1) {
-     (results || (results = results1 || (results1 = []))).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js
index 6c0cfe74b4..196e1db471 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment6.js]
+"use strict";
 function foo1(results, results1) {
     (results || (results = results1 || (results1 = []))).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js.diff
deleted file mode 100644
index 1f63063cc0..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment6(target=es2020).js
-+++ new.logicalAssignment6(target=es2020).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment6.js]
--"use strict";
- function foo1(results, results1) {
-     (results || (results = results1 || (results1 = []))).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js
index c82a302ad7..84bf9ce7db 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment6.js]
+"use strict";
 function foo1(results, results1) {
     (results ||= (results1 ||= [])).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js.diff
deleted file mode 100644
index f8aeb13da9..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment6(target=es2021).js
-+++ new.logicalAssignment6(target=es2021).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment6.js]
--"use strict";
- function foo1(results, results1) {
-     (results ||= (results1 ||= [])).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js
index c82a302ad7..84bf9ce7db 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment6.js]
+"use strict";
 function foo1(results, results1) {
     (results ||= (results1 ||= [])).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js.diff
deleted file mode 100644
index 5cae507f46..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment6(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment6(target=esnext).js
-+++ new.logicalAssignment6(target=esnext).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment6.js]
--"use strict";
- function foo1(results, results1) {
-     (results ||= (results1 ||= [])).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js
index 1a7331a756..b8d881046d 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment7.js]
+"use strict";
 function foo1(results, results1) {
     (results || (results = results1 || (results1 = []))).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js.diff
deleted file mode 100644
index d89555eedc..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment7(target=es2015).js
-+++ new.logicalAssignment7(target=es2015).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment7.js]
--"use strict";
- function foo1(results, results1) {
-     (results || (results = results1 || (results1 = []))).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js
index ea940b0a0d..2964dbb8a9 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment7.js]
+"use strict";
 function foo1(results, results1) {
     (results || (results = results1 || (results1 = []))).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js.diff
deleted file mode 100644
index 266cda175f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment7(target=es2020).js
-+++ new.logicalAssignment7(target=es2020).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment7.js]
--"use strict";
- function foo1(results, results1) {
-     (results || (results = results1 || (results1 = []))).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js
index 526f75bd12..4472dc86da 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment7.js]
+"use strict";
 function foo1(results, results1) {
     (results ||= results1 ||= []).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js.diff
deleted file mode 100644
index 51e45b8189..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment7(target=es2021).js
-+++ new.logicalAssignment7(target=es2021).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment7.js]
--"use strict";
- function foo1(results, results1) {
-     (results ||= results1 ||= []).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js
index 526f75bd12..4472dc86da 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js
@@ -15,6 +15,7 @@ function foo3(results: number[] | undefined, results1: number[] | undefined) {
 
 
 //// [logicalAssignment7.js]
+"use strict";
 function foo1(results, results1) {
     (results ||= results1 ||= []).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js.diff
deleted file mode 100644
index 7bd574bece..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment7(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment7(target=esnext).js
-+++ new.logicalAssignment7(target=esnext).js
-@@= skipped -14, +14 lines =@@
-
-
- //// [logicalAssignment7.js]
--"use strict";
- function foo1(results, results1) {
-     (results ||= results1 ||= []).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js
index 616569395c..91cbeda81e 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js
@@ -17,6 +17,7 @@ function foo3(results: number[] | undefined) {
 
 
 //// [logicalAssignment8.js]
+"use strict";
 function foo1(results) {
     var _a;
     (results || (results = (_a = bar === null || bar === void 0 ? void 0 : bar.value) !== null && _a !== void 0 ? _a : [])).push(100);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js.diff
deleted file mode 100644
index 92c51dfeeb..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2015).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment8(target=es2015).js
-+++ new.logicalAssignment8(target=es2015).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment8.js]
--"use strict";
- function foo1(results) {
-     var _a;
-     (results || (results = (_a = bar === null || bar === void 0 ? void 0 : bar.value) !== null && _a !== void 0 ? _a : [])).push(100);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js
index 8e1c15bc0c..ad8ec33a3e 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js
@@ -17,6 +17,7 @@ function foo3(results: number[] | undefined) {
 
 
 //// [logicalAssignment8.js]
+"use strict";
 function foo1(results) {
     (results || (results = bar?.value ?? [])).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js.diff
deleted file mode 100644
index 10f995941a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2020).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment8(target=es2020).js
-+++ new.logicalAssignment8(target=es2020).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment8.js]
--"use strict";
- function foo1(results) {
-     (results || (results = bar?.value ?? [])).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js
index b3be599f8f..47aa83f844 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js
@@ -17,6 +17,7 @@ function foo3(results: number[] | undefined) {
 
 
 //// [logicalAssignment8.js]
+"use strict";
 function foo1(results) {
     (results ||= bar?.value ?? []).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js.diff
deleted file mode 100644
index c937aba027..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=es2021).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment8(target=es2021).js
-+++ new.logicalAssignment8(target=es2021).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment8.js]
--"use strict";
- function foo1(results) {
-     (results ||= bar?.value ?? []).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js
index b3be599f8f..47aa83f844 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js
@@ -17,6 +17,7 @@ function foo3(results: number[] | undefined) {
 
 
 //// [logicalAssignment8.js]
+"use strict";
 function foo1(results) {
     (results ||= bar?.value ?? []).push(100);
 }
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js.diff
deleted file mode 100644
index 2d7bfbe87d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment8(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment8(target=esnext).js
-+++ new.logicalAssignment8(target=esnext).js
-@@= skipped -16, +16 lines =@@
-
-
- //// [logicalAssignment8.js]
--"use strict";
- function foo1(results) {
-     (results ||= bar?.value ?? []).push(100);
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment9.js b/testdata/baselines/reference/submodule/conformance/logicalAssignment9.js
index 62949dc5af..065f8df349 100644
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment9.js
+++ b/testdata/baselines/reference/submodule/conformance/logicalAssignment9.js
@@ -8,6 +8,7 @@ x.a &&= false;
 
 
 //// [logicalAssignment9.js]
+"use strict";
 var _a;
 (_a = x.a) !== null && _a !== void 0 ? _a : (x.a = true);
 x.a && (x.a = false);
diff --git a/testdata/baselines/reference/submodule/conformance/logicalAssignment9.js.diff b/testdata/baselines/reference/submodule/conformance/logicalAssignment9.js.diff
deleted file mode 100644
index b6e4422e48..0000000000
--- a/testdata/baselines/reference/submodule/conformance/logicalAssignment9.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.logicalAssignment9.js
-+++ new.logicalAssignment9.js
-@@= skipped -7, +7 lines =@@
-
-
- //// [logicalAssignment9.js]
--"use strict";
- var _a;
- (_a = x.a) !== null && _a !== void 0 ? _a : (x.a = true);
- x.a && (x.a = false);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js b/testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js
index f317b2f9a7..ee7a32d24d 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js
@@ -179,6 +179,7 @@ type Test2 = Result2<Fruit> // "apple:red" | "banana:yellow" | "orange:orange"
 
 
 //// [mappedTypeAsClauses.js]
+"use strict";
 // Mapped type 'as N' clauses
 const e1 = {
     foo: "hello"
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js.diff
deleted file mode 100644
index f809d77a46..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeAsClauses.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypeAsClauses.js
-+++ new.mappedTypeAsClauses.js
-@@= skipped -178, +178 lines =@@
-
-
- //// [mappedTypeAsClauses.js]
--"use strict";
- // Mapped type 'as N' clauses
- const e1 = {
-     foo: "hello"
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js b/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js
index 140904df30..8acd5ae579 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js
@@ -38,6 +38,7 @@ const modifier = <T extends TargetProps>(targetProps: T) => {
 
 
 //// [mappedTypeConstraints.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js.diff
deleted file mode 100644
index c9c010b016..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypeConstraints.js
-+++ new.mappedTypeConstraints.js
-@@= skipped -37, +37 lines =@@
-
-
- //// [mappedTypeConstraints.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js b/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js
index 12287bedbf..df4e0eb12d 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js
@@ -87,6 +87,7 @@ function genericTest<K extends string>(objectWithUnderscoredKeys: ObjectWithUnde
 
 
 //// [mappedTypeConstraints2.js]
+"use strict";
 function f1(obj, key) {
     const x = obj[key];
 }
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js.diff
deleted file mode 100644
index d99092c78a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeConstraints2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypeConstraints2.js
-+++ new.mappedTypeConstraints2.js
-@@= skipped -86, +86 lines =@@
-
-
- //// [mappedTypeConstraints2.js]
--"use strict";
- function f1(obj, key) {
-     const x = obj[key];
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js b/testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js
index 06ad3ce4e0..841ef15612 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js
@@ -22,6 +22,7 @@ foo({
 
 
 //// [mappedTypeInferenceErrors.js]
+"use strict";
 // Repro from #19316
 foo({
     props: { x: 10, y: 20 },
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js.diff
deleted file mode 100644
index 7bf3efa382..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeInferenceErrors.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypeInferenceErrors.js
-+++ new.mappedTypeInferenceErrors.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [mappedTypeInferenceErrors.js]
--"use strict";
- // Repro from #19316
- foo({
-     props: { x: 10, y: 20 },
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js b/testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js
index 90a96309cb..93b0c0cdeb 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js
@@ -66,6 +66,7 @@ type Evolver<T extends Evolvable<any> = any> = {
 
 
 //// [mappedTypeWithAny.js]
+"use strict";
 for (let id in z) {
     let data = z[id];
     let x = data.notAValue; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js.diff
deleted file mode 100644
index 2f59008148..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypeWithAny.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypeWithAny.js
-+++ new.mappedTypeWithAny.js
-@@= skipped -65, +65 lines =@@
-
-
- //// [mappedTypeWithAny.js]
--"use strict";
- for (let id in z) {
-     let data = z[id];
-     let x = data.notAValue; // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypes5.js b/testdata/baselines/reference/submodule/conformance/mappedTypes5.js
index d229052b34..1aba2f832e 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypes5.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypes5.js
@@ -64,6 +64,7 @@ function doit2() {
 
 
 //// [mappedTypes5.js]
+"use strict";
 function f(p, r, pr, rp) {
     let a1 = p;
     let a2 = r;
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypes5.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypes5.js.diff
deleted file mode 100644
index 7f4fa2cbe8..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypes5.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypes5.js
-+++ new.mappedTypes5.js
-@@= skipped -63, +63 lines =@@
-
-
- //// [mappedTypes5.js]
--"use strict";
- function f(p, r, pr, rp) {
-     let a1 = p;
-     let a2 = r;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypes6.js b/testdata/baselines/reference/submodule/conformance/mappedTypes6.js
index 8cb4eba016..76f7bf31f3 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypes6.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypes6.js
@@ -128,6 +128,7 @@ x5.b = 1;
 
 
 //// [mappedTypes6.js]
+"use strict";
 function f1(x, y, z) {
     x = x;
     x = y; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypes6.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypes6.js.diff
deleted file mode 100644
index 864ab12ecb..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypes6.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypes6.js
-+++ new.mappedTypes6.js
-@@= skipped -127, +127 lines =@@
-
-
- //// [mappedTypes6.js]
--"use strict";
- function f1(x, y, z) {
-     x = x;
-     x = y; // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js b/testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js
index b604603eec..1ad8a8945c 100644
--- a/testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js
+++ b/testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js
@@ -104,6 +104,7 @@ type T2 = Constrained<[string, number, boolean]>;  // string | number | boolean
 
 
 //// [mappedTypesArraysTuples.js]
+"use strict";
 let y10 = unboxify(x10);
 let y11 = unboxify(x11);
 let y12 = unboxify(x12);
diff --git a/testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js.diff b/testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js.diff
deleted file mode 100644
index 4a9c7bbb84..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mappedTypesArraysTuples.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mappedTypesArraysTuples.js
-+++ new.mappedTypesArraysTuples.js
-@@= skipped -103, +103 lines =@@
-
-
- //// [mappedTypesArraysTuples.js]
--"use strict";
- let y10 = unboxify(x10);
- let y11 = unboxify(x11);
- let y12 = unboxify(x12);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors1.js b/testdata/baselines/reference/submodule/conformance/mixinAccessors1.js
index 9d17437369..efbf7c2c43 100644
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors1.js
+++ b/testdata/baselines/reference/submodule/conformance/mixinAccessors1.js
@@ -24,6 +24,7 @@ class MyClass extends mixin(BaseClass) {
 }
 
 //// [mixinAccessors1.js]
+"use strict";
 // https://github.com/microsoft/TypeScript/issues/58790
 function mixin(superclass) {
     return class extends superclass {
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors1.js.diff b/testdata/baselines/reference/submodule/conformance/mixinAccessors1.js.diff
deleted file mode 100644
index da7fd0def3..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mixinAccessors1.js
-+++ new.mixinAccessors1.js
-@@= skipped -23, +23 lines =@@
- }
-
- //// [mixinAccessors1.js]
--"use strict";
- // https://github.com/microsoft/TypeScript/issues/58790
- function mixin(superclass) {
-     return class extends superclass {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors2.js b/testdata/baselines/reference/submodule/conformance/mixinAccessors2.js
index 6d768eb164..dfb739011c 100644
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors2.js
+++ b/testdata/baselines/reference/submodule/conformance/mixinAccessors2.js
@@ -17,6 +17,7 @@ class MyClass extends mixin(BaseClass) {
 
 
 //// [mixinAccessors2.js]
+"use strict";
 function mixin(superclass) {
     return class extends superclass {
         accessor name = "";
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors2.js.diff b/testdata/baselines/reference/submodule/conformance/mixinAccessors2.js.diff
deleted file mode 100644
index 305c3b5dbb..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mixinAccessors2.js
-+++ new.mixinAccessors2.js
-@@= skipped -16, +16 lines =@@
-
-
- //// [mixinAccessors2.js]
--"use strict";
- function mixin(superclass) {
-     return class extends superclass {
-         accessor name = "";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors3.js b/testdata/baselines/reference/submodule/conformance/mixinAccessors3.js
index 21ee8151ce..0b415f0cc0 100644
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors3.js
+++ b/testdata/baselines/reference/submodule/conformance/mixinAccessors3.js
@@ -22,6 +22,7 @@ class MyClass extends mixin(BaseClass) {
 
 
 //// [mixinAccessors3.js]
+"use strict";
 function mixin(superclass) {
     return class extends superclass {
         get name() {
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors3.js.diff b/testdata/baselines/reference/submodule/conformance/mixinAccessors3.js.diff
deleted file mode 100644
index 359905d983..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mixinAccessors3.js
-+++ new.mixinAccessors3.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [mixinAccessors3.js]
--"use strict";
- function mixin(superclass) {
-     return class extends superclass {
-         get name() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors4.js b/testdata/baselines/reference/submodule/conformance/mixinAccessors4.js
index 9c8660bd82..dae2068843 100644
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors4.js
+++ b/testdata/baselines/reference/submodule/conformance/mixinAccessors4.js
@@ -26,6 +26,7 @@ class C extends Mixin(A) {
 
 
 //// [mixinAccessors4.js]
+"use strict";
 // https://github.com/microsoft/TypeScript/issues/44938
 class A {
     constructor(...args) { }
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors4.js.diff b/testdata/baselines/reference/submodule/conformance/mixinAccessors4.js.diff
deleted file mode 100644
index 90ad28b02f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.mixinAccessors4.js
-+++ new.mixinAccessors4.js
-@@= skipped -25, +25 lines =@@
-
-
- //// [mixinAccessors4.js]
--"use strict";
- // https://github.com/microsoft/TypeScript/issues/44938
- class A {
-     constructor(...args) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors5.js b/testdata/baselines/reference/submodule/conformance/mixinAccessors5.js
index c1689d5ce0..ad64ee335d 100644
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors5.js
+++ b/testdata/baselines/reference/submodule/conformance/mixinAccessors5.js
@@ -26,6 +26,7 @@ declare class TestB extends basicMixin(GetterA, GetterB) {
   
 
 //// [mixinAccessors5.js]
+"use strict";
 // https://github.com/microsoft/TypeScript/issues/61967
 
 
diff --git a/testdata/baselines/reference/submodule/conformance/mixinAccessors5.js.diff b/testdata/baselines/reference/submodule/conformance/mixinAccessors5.js.diff
deleted file mode 100644
index cad2d1bf7d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/mixinAccessors5.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.mixinAccessors5.js
-+++ new.mixinAccessors5.js
-@@= skipped -25, +25 lines =@@
-   
-
- //// [mixinAccessors5.js]
--"use strict";
- // https://github.com/microsoft/TypeScript/issues/61967
-
diff --git a/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js b/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js
index b4052d5761..149fde7c18 100644
--- a/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js
+++ b/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js
@@ -38,6 +38,7 @@ function f3<T extends E>(v: T | { x: string }) {
 
 
 //// [narrowingConstrainedTypeVariable.js]
+"use strict";
 // Repro from #20138
 class C {
 }
diff --git a/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js.diff b/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js.diff
index 575d141361..5f0d4bba90 100644
--- a/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/narrowingConstrainedTypeVariable.js.diff
@@ -1,14 +1,6 @@
 --- old.narrowingConstrainedTypeVariable.js
 +++ new.narrowingConstrainedTypeVariable.js
-@@= skipped -37, +37 lines =@@
-
-
- //// [narrowingConstrainedTypeVariable.js]
--"use strict";
- // Repro from #20138
- class C {
- }
-@@= skipped -23, +22 lines =@@
+@@= skipped -60, +60 lines =@@
      }
  }
  class E {
diff --git a/testdata/baselines/reference/submodule/conformance/neverInference.js b/testdata/baselines/reference/submodule/conformance/neverInference.js
index 2eb68dac3c..406aa144af 100644
--- a/testdata/baselines/reference/submodule/conformance/neverInference.js
+++ b/testdata/baselines/reference/submodule/conformance/neverInference.js
@@ -32,6 +32,7 @@ f2(Array.from([]), [0], (a1, a2) => a1 - a2);
 
 
 //// [neverInference.js]
+"use strict";
 let neverArray = [];
 let a1 = f1([]); // never
 let a2 = f1(neverArray); // never
diff --git a/testdata/baselines/reference/submodule/conformance/neverInference.js.diff b/testdata/baselines/reference/submodule/conformance/neverInference.js.diff
deleted file mode 100644
index 289231f8e3..0000000000
--- a/testdata/baselines/reference/submodule/conformance/neverInference.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.neverInference.js
-+++ new.neverInference.js
-@@= skipped -31, +31 lines =@@
-
-
- //// [neverInference.js]
--"use strict";
- let neverArray = [];
- let a1 = f1([]); // never
- let a2 = f1(neverArray); // never
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js b/testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js
index e911c6ef16..cf50cbeab7 100644
--- a/testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js
+++ b/testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js
@@ -16,3 +16,4 @@ type T12 = { a: string } & never;
 
 
 //// [neverUnionIntersection.js]
+"use strict";
diff --git a/testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js.diff b/testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js.diff
deleted file mode 100644
index 05af01e7d2..0000000000
--- a/testdata/baselines/reference/submodule/conformance/neverUnionIntersection.js.diff
+++ /dev/null
@@ -1,7 +0,0 @@
---- old.neverUnionIntersection.js
-+++ new.neverUnionIntersection.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [neverUnionIntersection.js]
--"use strict";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js b/testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js
index 54e26d7efa..b6ae4bf2c5 100644
--- a/testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js
+++ b/testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js
@@ -13,6 +13,7 @@ f.marked = true;
 
 
 //// [newTargetNarrowing.js]
+"use strict";
 function foo(x) { }
 function f() {
     if (new.target.marked === true) {
diff --git a/testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js.diff b/testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js.diff
deleted file mode 100644
index 9f5ba9ff1a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/newTargetNarrowing.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.newTargetNarrowing.js
-+++ new.newTargetNarrowing.js
-@@= skipped -12, +12 lines =@@
-
-
- //// [newTargetNarrowing.js]
--"use strict";
- function foo(x) { }
- function f() {
-     if (new.target.marked === true) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/noInfer.js b/testdata/baselines/reference/submodule/conformance/noInfer.js
index 1a24b75eb9..580436d3c1 100644
--- a/testdata/baselines/reference/submodule/conformance/noInfer.js
+++ b/testdata/baselines/reference/submodule/conformance/noInfer.js
@@ -85,6 +85,7 @@ class OkClass2<T> {
 
 
 //// [noInfer.js]
+"use strict";
 // NoInfer<T> is erased for primitives
 foo1('foo', 'foo'); // ok
 foo1('foo', 'bar'); // error
diff --git a/testdata/baselines/reference/submodule/conformance/noInfer.js.diff b/testdata/baselines/reference/submodule/conformance/noInfer.js.diff
index d570c4d76f..e7f5aaa6c2 100644
--- a/testdata/baselines/reference/submodule/conformance/noInfer.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/noInfer.js.diff
@@ -1,14 +1,6 @@
 --- old.noInfer.js
 +++ new.noInfer.js
-@@= skipped -84, +84 lines =@@
-
-
- //// [noInfer.js]
--"use strict";
- // NoInfer<T> is erased for primitives
- foo1('foo', 'foo'); // ok
- foo1('foo', 'bar'); // error
-@@= skipped -20, +19 lines =@@
+@@= skipped -104, +104 lines =@@
  doWork(comp, {}); // error
  const mutate1 = mutate((a, b) => b);
  class OkClass {
diff --git a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js b/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js
index 2d2e82ba69..e24e929637 100644
--- a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js
+++ b/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js
@@ -105,6 +105,7 @@ const fn3 = <Key extends keyof typeof myRecord2>(key: Key) => {
 
 
 //// [noUncheckedIndexedAccess.js]
+"use strict";
 var NumericEnum1;
 (function (NumericEnum1) {
     NumericEnum1[NumericEnum1["A"] = 0] = "A";
diff --git a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js.diff b/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js.diff
deleted file mode 100644
index 85874927f3..0000000000
--- a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccess.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.noUncheckedIndexedAccess.js
-+++ new.noUncheckedIndexedAccess.js
-@@= skipped -104, +104 lines =@@
-
-
- //// [noUncheckedIndexedAccess.js]
--"use strict";
- var NumericEnum1;
- (function (NumericEnum1) {
-     NumericEnum1[NumericEnum1["A"] = 0] = "A";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js b/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js
index 765f31f6b0..a8d73dd25c 100644
--- a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js
+++ b/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js
@@ -76,6 +76,7 @@ declare let target_string_arr: string[];
 
 
 //// [noUncheckedIndexedAccessDestructuring.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js.diff b/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js.diff
deleted file mode 100644
index a21197fd26..0000000000
--- a/testdata/baselines/reference/submodule/conformance/noUncheckedIndexedAccessDestructuring.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.noUncheckedIndexedAccessDestructuring.js
-+++ new.noUncheckedIndexedAccessDestructuring.js
-@@= skipped -75, +75 lines =@@
-
-
- //// [noUncheckedIndexedAccessDestructuring.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js b/testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js
index fc5167a7af..78aa2e08b5 100644
--- a/testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js
+++ b/testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js
@@ -16,6 +16,7 @@ function foo<T, U>(x: T) {
 
 
 //// [nonPrimitiveAndTypeVariables.js]
+"use strict";
 // Repros from #23800
 let a = { a: 0 };
 let b = { a: 0 };
diff --git a/testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js.diff b/testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js.diff
deleted file mode 100644
index 5966f67d82..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nonPrimitiveAndTypeVariables.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nonPrimitiveAndTypeVariables.js
-+++ new.nonPrimitiveAndTypeVariables.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [nonPrimitiveAndTypeVariables.js]
--"use strict";
- // Repros from #23800
- let a = { a: 0 };
- let b = { a: 0 };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js b/testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js
index ce11e30edf..95f43f103f 100644
--- a/testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js
+++ b/testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js
@@ -35,6 +35,7 @@ function n<T extends { [s: string]: number }, P extends keyof T>(s: string, tp:
 
 
 //// [nonPrimitiveConstraintOfIndexAccessType.js]
+"use strict";
 // test for #15371
 function f(s, tp) {
     tp = s;
diff --git a/testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js.diff b/testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js.diff
deleted file mode 100644
index 99caf37728..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nonPrimitiveConstraintOfIndexAccessType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nonPrimitiveConstraintOfIndexAccessType.js
-+++ new.nonPrimitiveConstraintOfIndexAccessType.js
-@@= skipped -34, +34 lines =@@
-
-
- //// [nonPrimitiveConstraintOfIndexAccessType.js]
--"use strict";
- // test for #15371
- function f(s, tp) {
-     tp = s;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js
index 5a51b1d2c7..c4921eb3c8 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js
@@ -17,6 +17,7 @@ function neverThis(): never {
 
 
 //// [nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js]
+"use strict";
 // https://github.com/microsoft/TypeScript/issues/61109
 class Cls {
     #privateProp;
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js.diff
index 98c4dbb1c1..d1aec91325 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js.diff
@@ -1,10 +1,8 @@
 --- old.nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js
 +++ new.nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js
-@@= skipped -16, +16 lines =@@
-
-
+@@= skipped -18, +18 lines =@@
  //// [nullishCoalescingAssignmentVsPrivateFieldsJsEmit1.js]
--"use strict";
+ "use strict";
  // https://github.com/microsoft/TypeScript/issues/61109
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js
index 3438131d93..6d59d7d72b 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js
@@ -68,6 +68,7 @@ else {
 
 
 //// [nullishCoalescingOperator1.js]
+"use strict";
 const aa1 = a1 !== null && a1 !== void 0 ? a1 : 'whatever';
 const aa2 = a2 !== null && a2 !== void 0 ? a2 : 'whatever';
 const aa3 = a3 !== null && a3 !== void 0 ? a3 : 'whatever';
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js.diff
deleted file mode 100644
index 78d6fe9d18..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nullishCoalescingOperator1.js
-+++ new.nullishCoalescingOperator1.js
-@@= skipped -67, +67 lines =@@
-
-
- //// [nullishCoalescingOperator1.js]
--"use strict";
- const aa1 = a1 !== null && a1 !== void 0 ? a1 : 'whatever';
- const aa2 = a2 !== null && a2 !== void 0 ? a2 : 'whatever';
- const aa3 = a3 !== null && a3 !== void 0 ? a3 : 'whatever';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js
index 722ffdb2e8..786e927f86 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js
@@ -8,5 +8,6 @@ let gg = f() ?? 'foo'
 
 
 //// [nullishCoalescingOperator10.js]
+"use strict";
 var _a;
 let gg = (_a = f()) !== null && _a !== void 0 ? _a : 'foo';
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js.diff
deleted file mode 100644
index b96c0d82b6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator10.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.nullishCoalescingOperator10.js
-+++ new.nullishCoalescingOperator10.js
-@@= skipped -7, +7 lines =@@
-
-
- //// [nullishCoalescingOperator10.js]
--"use strict";
- var _a;
- let gg = (_a = f()) !== null && _a !== void 0 ? _a : 'foo';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js
index 2938a1f5d7..7093dfd437 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js
@@ -9,4 +9,5 @@ let g11 = f11 ?? f11.toFixed()
 
 
 //// [nullishCoalescingOperator11.js]
+"use strict";
 let g11 = f11 !== null && f11 !== void 0 ? f11 : f11.toFixed();
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js.diff
deleted file mode 100644
index c445e84a2d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator11.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.nullishCoalescingOperator11.js
-+++ new.nullishCoalescingOperator11.js
-@@= skipped -8, +8 lines =@@
-
-
- //// [nullishCoalescingOperator11.js]
--"use strict";
- let g11 = f11 !== null && f11 !== void 0 ? f11 : f11.toFixed();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js
index 24a506dee7..788670e975 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js
@@ -6,6 +6,7 @@ for (const i of obj?.arr ?? []) { }
 
 
 //// [nullishCoalescingOperator12.js]
+"use strict";
 var _a;
 const obj = { arr: [] };
 for (const i of (_a = obj === null || obj === void 0 ? void 0 : obj.arr) !== null && _a !== void 0 ? _a : []) { }
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js.diff
deleted file mode 100644
index 4d05bb3790..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator12.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nullishCoalescingOperator12.js
-+++ new.nullishCoalescingOperator12.js
-@@= skipped -5, +5 lines =@@
-
-
- //// [nullishCoalescingOperator12.js]
--"use strict";
- var _a;
- const obj = { arr: [] };
- for (const i of (_a = obj === null || obj === void 0 ? void 0 : obj.arr) !== null && _a !== void 0 ? _a : []) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js
index b71b7ae547..7c5882371f 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js
@@ -23,6 +23,7 @@ const aa8 = a8 ?? 'whatever'
 const aa9 = a9 ?? 'whatever'
 
 //// [nullishCoalescingOperator2.js]
+"use strict";
 const aa1 = a1 !== null && a1 !== void 0 ? a1 : 'whatever';
 const aa2 = a2 !== null && a2 !== void 0 ? a2 : 'whatever';
 const aa3 = a3 !== null && a3 !== void 0 ? a3 : 'whatever';
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js.diff
deleted file mode 100644
index 5420c541e6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nullishCoalescingOperator2.js
-+++ new.nullishCoalescingOperator2.js
-@@= skipped -22, +22 lines =@@
- const aa9 = a9 ?? 'whatever'
-
- //// [nullishCoalescingOperator2.js]
--"use strict";
- const aa1 = a1 !== null && a1 !== void 0 ? a1 : 'whatever';
- const aa2 = a2 !== null && a2 !== void 0 ? a2 : 'whatever';
- const aa3 = a3 !== null && a3 !== void 0 ? a3 : 'whatever';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js
index 4143966936..55108b61cf 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js
@@ -13,5 +13,6 @@ const aa1 = a1 ?? a2 ?? a3 ?? a4 ?? a5 ?? a6 ?? 'whatever'
 
 
 //// [nullishCoalescingOperator3.js]
+"use strict";
 var _a, _b, _c, _d, _e;
 const aa1 = (_e = (_d = (_c = (_b = (_a = a1 !== null && a1 !== void 0 ? a1 : a2) !== null && _a !== void 0 ? _a : a3) !== null && _b !== void 0 ? _b : a4) !== null && _c !== void 0 ? _c : a5) !== null && _d !== void 0 ? _d : a6) !== null && _e !== void 0 ? _e : 'whatever';
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js.diff
deleted file mode 100644
index 08a610502e..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator3.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.nullishCoalescingOperator3.js
-+++ new.nullishCoalescingOperator3.js
-@@= skipped -12, +12 lines =@@
-
-
- //// [nullishCoalescingOperator3.js]
--"use strict";
- var _a, _b, _c, _d, _e;
- const aa1 = (_e = (_d = (_c = (_b = (_a = a1 !== null && a1 !== void 0 ? a1 : a2) !== null && _a !== void 0 ? _a : a3) !== null && _b !== void 0 ? _b : a4) !== null && _c !== void 0 ? _c : a5) !== null && _d !== void 0 ? _d : a6) !== null && _e !== void 0 ? _e : 'whatever';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js
index 989e12f337..abf4161ed0 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js
@@ -7,5 +7,6 @@ const aa2 = a1 || a1.toLocaleUpperCase()
 
 
 //// [nullishCoalescingOperator4.js]
+"use strict";
 const aa1 = a1 !== null && a1 !== void 0 ? a1 : a1.toLowerCase();
 const aa2 = a1 || a1.toLocaleUpperCase();
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js.diff
deleted file mode 100644
index 9736409af8..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator4.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.nullishCoalescingOperator4.js
-+++ new.nullishCoalescingOperator4.js
-@@= skipped -6, +6 lines =@@
-
-
- //// [nullishCoalescingOperator4.js]
--"use strict";
- const aa1 = a1 !== null && a1 !== void 0 ? a1 : a1.toLowerCase();
- const aa2 = a1 || a1.toLocaleUpperCase();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js
index 2fd55a5f61..504bd34d6b 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js
@@ -43,6 +43,7 @@ a && (b ?? c);
 
 
 //// [nullishCoalescingOperator5.js]
+"use strict";
 var _a, _b, _c, _d;
 // should be a syntax error
 (a !== null && a !== void 0 ? a : b) || c;
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js.diff
deleted file mode 100644
index 56762afba0..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator5.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nullishCoalescingOperator5.js
-+++ new.nullishCoalescingOperator5.js
-@@= skipped -42, +42 lines =@@
-
-
- //// [nullishCoalescingOperator5.js]
--"use strict";
- var _a, _b, _c, _d;
- // should be a syntax error
- (a !== null && a !== void 0 ? a : b) || c;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js
index 8819f7011b..9721f00c13 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js
@@ -5,4 +5,5 @@ function foo(foo: string, bar = foo ?? "bar") { }
 
 
 //// [nullishCoalescingOperator6.js]
+"use strict";
 function foo(foo, bar = foo !== null && foo !== void 0 ? foo : "bar") { }
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js.diff
deleted file mode 100644
index 477ec0bb1b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator6.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.nullishCoalescingOperator6.js
-+++ new.nullishCoalescingOperator6.js
-@@= skipped -4, +4 lines =@@
-
-
- //// [nullishCoalescingOperator6.js]
--"use strict";
- function foo(foo, bar = foo !== null && foo !== void 0 ? foo : "bar") { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js
index 3837c27a93..a93504bcaf 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js
@@ -15,6 +15,7 @@ function f () {
 
 
 //// [nullishCoalescingOperator7.js]
+"use strict";
 const foo1 = a ? 1 : 2;
 const foo2 = (a !== null && a !== void 0 ? a : 'foo') ? 1 : 2;
 const foo3 = (a !== null && a !== void 0 ? a : 'foo') ? (b !== null && b !== void 0 ? b : 'bar') : (c !== null && c !== void 0 ? c : 'baz');
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js.diff
deleted file mode 100644
index 8ad2b5234f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator7.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nullishCoalescingOperator7.js
-+++ new.nullishCoalescingOperator7.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [nullishCoalescingOperator7.js]
--"use strict";
- const foo1 = a ? 1 : 2;
- const foo2 = (a !== null && a !== void 0 ? a : 'foo') ? 1 : 2;
- const foo3 = (a !== null && a !== void 0 ? a : 'foo') ? (b !== null && b !== void 0 ? b : 'bar') : (c !== null && c !== void 0 ? c : 'baz');
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js
index 9d8c0504d0..182c60f758 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js
@@ -10,6 +10,7 @@ const n3 = a.m() ?? b.p ?? b.m() ?? "default";;
 
 
 //// [nullishCoalescingOperator8.js]
+"use strict";
 var _a, _b, _c, _d, _e;
 const n1 = (_a = a.p) !== null && _a !== void 0 ? _a : "default";
 const n2 = (_b = a.m()) !== null && _b !== void 0 ? _b : "default";
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js.diff
deleted file mode 100644
index 525c699e2f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator8.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nullishCoalescingOperator8.js
-+++ new.nullishCoalescingOperator8.js
-@@= skipped -9, +9 lines =@@
-
-
- //// [nullishCoalescingOperator8.js]
--"use strict";
- var _a, _b, _c, _d, _e;
- const n1 = (_a = a.p) !== null && _a !== void 0 ? _a : "default";
- const n2 = (_b = a.m()) !== null && _b !== void 0 ? _b : "default";
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js
index 9d9c56df03..67c38d2dfe 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js
@@ -8,5 +8,6 @@ let gg = f ?? (abc => { void abc.toLowerCase() })
 
 
 //// [nullishCoalescingOperator9.js]
+"use strict";
 let g = f || (abc => { void abc.toLowerCase(); });
 let gg = f !== null && f !== void 0 ? f : (abc => { void abc.toLowerCase(); });
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js.diff
deleted file mode 100644
index 3ecad1f18d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator9.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.nullishCoalescingOperator9.js
-+++ new.nullishCoalescingOperator9.js
-@@= skipped -7, +7 lines =@@
-
-
- //// [nullishCoalescingOperator9.js]
--"use strict";
- let g = f || (abc => { void abc.toLowerCase(); });
- let gg = f !== null && f !== void 0 ? f : (abc => { void abc.toLowerCase(); });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js
index 02f604adfc..f29864b3a9 100644
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js
+++ b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js
@@ -41,6 +41,7 @@ let y6 = c && (a ?? b) as any;
 
 
 //// [nullishCoalescingOperator_es2020.js]
+"use strict";
 const aa1 = a1 ?? 'whatever';
 const aa2 = a2 ?? 'whatever';
 const aa3 = a3 ?? 'whatever';
diff --git a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js.diff b/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js.diff
deleted file mode 100644
index 2755d3b0f5..0000000000
--- a/testdata/baselines/reference/submodule/conformance/nullishCoalescingOperator_es2020.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.nullishCoalescingOperator_es2020.js
-+++ new.nullishCoalescingOperator_es2020.js
-@@= skipped -40, +40 lines =@@
-
-
- //// [nullishCoalescingOperator_es2020.js]
--"use strict";
- const aa1 = a1 ?? 'whatever';
- const aa2 = a2 ?? 'whatever';
- const aa3 = a3 ?? 'whatever';
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js b/testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js
index fee2fee04f..699c6112ba 100644
--- a/testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js
+++ b/testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js
@@ -41,6 +41,7 @@ f([container1, container2], (value1, value2) => {
 
 
 //// [numericStringLiteralTypes.js]
+"use strict";
 function f1(a, x) {
     let s = a[x]; // boolean
 }
diff --git a/testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js.diff b/testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js.diff
deleted file mode 100644
index 77f96663fe..0000000000
--- a/testdata/baselines/reference/submodule/conformance/numericStringLiteralTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.numericStringLiteralTypes.js
-+++ new.numericStringLiteralTypes.js
-@@= skipped -40, +40 lines =@@
-
-
- //// [numericStringLiteralTypes.js]
--"use strict";
- function f1(a, x) {
-     let s = a[x]; // boolean
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js b/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js
index fe8761f99b..792be54664 100644
--- a/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js
+++ b/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js
@@ -53,6 +53,7 @@ let e4 = f({ a: 2 }, data);
 
 
 //// [objectLiteralNormalization.js]
+"use strict";
 // Object literals in unions are normalized upon widening
 let a1 = [{ a: 0 }, { a: 1, b: "x" }, { a: 2, b: "y", c: true }][0];
 a1.a; // number
diff --git a/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js.diff b/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js.diff
index 5df005def2..54461622e2 100644
--- a/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/objectLiteralNormalization.js.diff
@@ -1,14 +1,6 @@
 --- old.objectLiteralNormalization.js
 +++ new.objectLiteralNormalization.js
-@@= skipped -52, +52 lines =@@
-
-
- //// [objectLiteralNormalization.js]
--"use strict";
- // Object literals in unions are normalized upon widening
- let a1 = [{ a: 0 }, { a: 1, b: "x" }, { a: 2, b: "y", c: true }][0];
- a1.a; // number
-@@= skipped -94, +93 lines =@@
+@@= skipped -146, +146 lines =@@
      baz?: boolean;
  };
  declare let c1: {
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js b/testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js
index 94771a0c3c..a9d297e60a 100644
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js
+++ b/testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js
@@ -20,6 +20,7 @@ writable.a = 0;  // should be ok.
 
 
 //// [objectSpreadIndexSignature.js]
+"use strict";
 let i = Object.assign(Object.assign({}, indexed1), { b: 11 });
 // only indexed has indexer, so i[101]: any
 i[101];
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js.diff b/testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js.diff
deleted file mode 100644
index 58f2c3f6f9..0000000000
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadIndexSignature.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.objectSpreadIndexSignature.js
-+++ new.objectSpreadIndexSignature.js
-@@= skipped -19, +19 lines =@@
-
-
- //// [objectSpreadIndexSignature.js]
--"use strict";
- let i = Object.assign(Object.assign({}, indexed1), { b: 11 });
- // only indexed has indexer, so i[101]: any
- i[101];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js b/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js
index 2bc631f603..c24e89a53a 100644
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js
+++ b/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js
@@ -87,6 +87,7 @@ function f(cnd: Record<number, boolean>){
 }
 
 //// [objectSpreadRepeatedComplexity.js]
+"use strict";
 function f(cnd) {
     // Type is a union of 2^(n-1) members, where n is the number of spread objects
     return Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign({}, (cnd[1] &&
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js.diff b/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js.diff
deleted file mode 100644
index 25433b6e5b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedComplexity.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.objectSpreadRepeatedComplexity.js
-+++ new.objectSpreadRepeatedComplexity.js
-@@= skipped -86, +86 lines =@@
- }
-
- //// [objectSpreadRepeatedComplexity.js]
--"use strict";
- function f(cnd) {
-     // Type is a union of 2^(n-1) members, where n is the number of spread objects
-     return Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign({}, (cnd[1] &&
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js b/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js
index 51d4c4dbc9..4cf4463608 100644
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js
+++ b/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js
@@ -64,6 +64,7 @@ function parseWithSpread(config: Record<string, number>): Props {
 parseWithSpread({ a: 1, b: 2, z: 26 })
 
 //// [objectSpreadRepeatedNullCheckPerf.js]
+"use strict";
 function parseWithSpread(config) {
     return Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign({}, config.a !== undefined && { a: config.a.toString() }), config.b !== undefined && { b: config.b.toString() }), config.c !== undefined && { c: config.c.toString() }), config.d !== undefined && { d: config.d.toString() }), config.e !== undefined && { e: config.e.toString() }), config.f !== undefined && { f: config.f.toString() }), config.g !== undefined && { g: config.g.toString() }), config.h !== undefined && { h: config.h.toString() }), config.i !== undefined && { i: config.i.toString() }), config.j !== undefined && { j: config.j.toString() }), config.k !== undefined && { k: config.k.toString() }), config.l !== undefined && { l: config.l.toString() }), config.m !== undefined && { m: config.m.toString() }), config.n !== undefined && { n: config.n.toString() }), config.o !== undefined && { o: config.o.toString() }), config.p !== undefined && { p: config.p.toString() }), config.q !== undefined && { q: config.q.toString() }), config.r !== undefined && { r: config.r.toString() }), config.s !== undefined && { s: config.s.toString() }), config.t !== undefined && { t: config.t.toString() }), config.u !== undefined && { u: config.u.toString() }), config.v !== undefined && { v: config.v.toString() }), config.w !== undefined && { w: config.w.toString() }), config.x !== undefined && { x: config.x.toString() }), config.y !== undefined && { y: config.y.toString() }), config.z !== undefined && { z: config.z.toString() });
 }
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js.diff b/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js.diff
deleted file mode 100644
index 833039cb90..0000000000
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadRepeatedNullCheckPerf.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.objectSpreadRepeatedNullCheckPerf.js
-+++ new.objectSpreadRepeatedNullCheckPerf.js
-@@= skipped -63, +63 lines =@@
- parseWithSpread({ a: 1, b: 2, z: 26 })
-
- //// [objectSpreadRepeatedNullCheckPerf.js]
--"use strict";
- function parseWithSpread(config) {
-     return Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign({}, config.a !== undefined && { a: config.a.toString() }), config.b !== undefined && { b: config.b.toString() }), config.c !== undefined && { c: config.c.toString() }), config.d !== undefined && { d: config.d.toString() }), config.e !== undefined && { e: config.e.toString() }), config.f !== undefined && { f: config.f.toString() }), config.g !== undefined && { g: config.g.toString() }), config.h !== undefined && { h: config.h.toString() }), config.i !== undefined && { i: config.i.toString() }), config.j !== undefined && { j: config.j.toString() }), config.k !== undefined && { k: config.k.toString() }), config.l !== undefined && { l: config.l.toString() }), config.m !== undefined && { m: config.m.toString() }), config.n !== undefined && { n: config.n.toString() }), config.o !== undefined && { o: config.o.toString() }), config.p !== undefined && { p: config.p.toString() }), config.q !== undefined && { q: config.q.toString() }), config.r !== undefined && { r: config.r.toString() }), config.s !== undefined && { s: config.s.toString() }), config.t !== undefined && { t: config.t.toString() }), config.u !== undefined && { u: config.u.toString() }), config.v !== undefined && { v: config.v.toString() }), config.w !== undefined && { w: config.w.toString() }), config.x !== undefined && { x: config.x.toString() }), config.y !== undefined && { y: config.y.toString() }), config.z !== undefined && { z: config.z.toString() });
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js b/testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js
index c6497ee566..9fb85226a1 100644
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js
+++ b/testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js
@@ -6,5 +6,6 @@ const o2: { foo: undefined } = { foo: 1, ... { set foo(_v: number) { } } }
 
 
 //// [objectSpreadSetonlyAccessor.js]
+"use strict";
 const o1 = { foo: 1, ...{ set bar(_v) { } } };
 const o2 = { foo: 1, ...{ set foo(_v) { } } };
diff --git a/testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js.diff b/testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js.diff
deleted file mode 100644
index b560b47d42..0000000000
--- a/testdata/baselines/reference/submodule/conformance/objectSpreadSetonlyAccessor.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.objectSpreadSetonlyAccessor.js
-+++ new.objectSpreadSetonlyAccessor.js
-@@= skipped -5, +5 lines =@@
-
-
- //// [objectSpreadSetonlyAccessor.js]
--"use strict";
- const o1 = { foo: 1, ...{ set bar(_v) { } } };
- const o2 = { foo: 1, ...{ set foo(_v) { } } };
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js b/testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js
index a548b0d72c..1720d52c33 100644
--- a/testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js
+++ b/testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js
@@ -96,6 +96,7 @@ function f3(sToAny: StringTo<any>, nToNumber: NumberToNumber, strToAnyNumToNum:
 }
 
 //// [objectTypeWithStringAndNumberIndexSignatureToAny.js]
+"use strict";
 // When checking compatibility between two types,
 // TypeScript should not require an index signature if
 // the target side index signature maps to `any` *and*
diff --git a/testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js.diff b/testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js.diff
deleted file mode 100644
index 17ef7e79e3..0000000000
--- a/testdata/baselines/reference/submodule/conformance/objectTypeWithStringAndNumberIndexSignatureToAny.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.objectTypeWithStringAndNumberIndexSignatureToAny.js
-+++ new.objectTypeWithStringAndNumberIndexSignatureToAny.js
-@@= skipped -95, +95 lines =@@
- }
-
- //// [objectTypeWithStringAndNumberIndexSignatureToAny.js]
--"use strict";
- // When checking compatibility between two types,
- // TypeScript should not require an index signature if
- // the target side index signature maps to `any` *and*
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js b/testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js
index 6ac9bdc7b1..d41bb4fc93 100644
--- a/testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js
+++ b/testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js
@@ -22,6 +22,7 @@ function f<T>() {
 
 
 //// [optionalPropertyAssignableToStringIndexSignature.js]
+"use strict";
 stringDictionary = optionalProperties; // ok
 stringDictionary = undefinedProperties; // error
 probablyArray = numberLiteralKeys; // error
diff --git a/testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js.diff b/testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js.diff
deleted file mode 100644
index 2ef1a2fe2c..0000000000
--- a/testdata/baselines/reference/submodule/conformance/optionalPropertyAssignableToStringIndexSignature.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.optionalPropertyAssignableToStringIndexSignature.js
-+++ new.optionalPropertyAssignableToStringIndexSignature.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [optionalPropertyAssignableToStringIndexSignature.js]
--"use strict";
- stringDictionary = optionalProperties; // ok
- stringDictionary = undefinedProperties; // error
- probablyArray = numberLiteralKeys; // error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js b/testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js
index b3d5a74cd8..d1d166c90d 100644
--- a/testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js
+++ b/testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js
@@ -48,6 +48,7 @@ t4 = [];
 
 
 //// [optionalTupleElements1.js]
+"use strict";
 function f1(t1, t2, t3, t4) {
     t1 = t1;
     t1 = t2; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js.diff b/testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js.diff
deleted file mode 100644
index f5a8e43133..0000000000
--- a/testdata/baselines/reference/submodule/conformance/optionalTupleElements1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.optionalTupleElements1.js
-+++ new.optionalTupleElements1.js
-@@= skipped -47, +47 lines =@@
-
-
- //// [optionalTupleElements1.js]
--"use strict";
- function f1(t1, t2, t3, t4) {
-     t1 = t1;
-     t1 = t2; // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js b/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js
index 067b1f8b52..aa3e53a77c 100644
--- a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js
+++ b/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js
@@ -26,6 +26,7 @@ const matches = x.get(id1);
 
 
 //// [partiallyNamedTuples2.js]
+"use strict";
 const x = null;
 const id1 = "abc";
 const matches = x.get(id1);
diff --git a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js.diff b/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js.diff
deleted file mode 100644
index 1a3ffe53bd..0000000000
--- a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.partiallyNamedTuples2.js
-+++ new.partiallyNamedTuples2.js
-@@= skipped -25, +25 lines =@@
-
-
- //// [partiallyNamedTuples2.js]
--"use strict";
- const x = null;
- const id1 = "abc";
- const matches = x.get(id1);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js b/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js
index 3399d1d459..78ccfe67b9 100644
--- a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js
+++ b/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js
@@ -7,4 +7,5 @@ const output = ((...args) => args)(...tuple);
 
 
 //// [partiallyNamedTuples3.js]
+"use strict";
 const output = ((...args) => args)(...tuple);
diff --git a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js.diff b/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js.diff
deleted file mode 100644
index 1d37fc6e16..0000000000
--- a/testdata/baselines/reference/submodule/conformance/partiallyNamedTuples3.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.partiallyNamedTuples3.js
-+++ new.partiallyNamedTuples3.js
-@@= skipped -6, +6 lines =@@
-
-
- //// [partiallyNamedTuples3.js]
--"use strict";
- const output = ((...args) => args)(...tuple);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js b/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js
index 05cac1b960..a576ea5385 100644
--- a/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js
+++ b/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js
@@ -16,6 +16,7 @@ class A {
 
 
 //// [privateIdentifierChain.1.js]
+"use strict";
 class A {
     a;
     #b;
diff --git a/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js.diff b/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js.diff
index fb58de7ca2..82de83750a 100644
--- a/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateIdentifierChain.1.js.diff
@@ -1,10 +1,8 @@
 --- old.privateIdentifierChain.1.js
 +++ new.privateIdentifierChain.1.js
-@@= skipped -15, +15 lines =@@
-
-
+@@= skipped -17, +17 lines =@@
  //// [privateIdentifierChain.1.js]
--"use strict";
+ "use strict";
  class A {
 +    a;
      #b;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js b/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js
index 714b7edcc7..a65d2f55ca 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js
@@ -17,6 +17,7 @@ class A1 {
 
 
 //// [privateNameAccessors.js]
+"use strict";
 class A1 {
     get #prop() { return ""; }
     set #prop(param) { }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js.diff
index b55fbfc685..d0a9add255 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAccessors.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameAccessors.js
 +++ new.privateNameAccessors.js
-@@= skipped -16, +16 lines =@@
-
+@@= skipped -17, +17 lines =@@
 
  //// [privateNameAccessors.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
 -    if (kind === "m") throw new TypeError("Private method is not writable");
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js b/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js
index 3002832314..cb9f1cbe82 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js
@@ -30,6 +30,7 @@ class A {
 
 
 //// [privateNameAndAny.js]
+"use strict";
 class A {
     #foo = true;
     static #baz = 10;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js.diff
index c059991d94..39c727a798 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAndAny.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameAndAny.js
 +++ new.privateNameAndAny.js
-@@= skipped -29, +29 lines =@@
-
+@@= skipped -30, +30 lines =@@
 
  //// [privateNameAndAny.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js b/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js
index 4a4f743c5b..b57a1932d0 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js
@@ -14,6 +14,7 @@ class A {
 
 
 //// [privateNameAndIndexSignature.js]
+"use strict";
 class A {
     #foo = 3;
     ["#bar"] = this["#bar"]; // Error (private identifiers should not prevent circularity checking for computeds)
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js.diff
index 205bf8adfc..84e1afb1ed 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAndIndexSignature.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameAndIndexSignature.js
 +++ new.privateNameAndIndexSignature.js
-@@= skipped -13, +13 lines =@@
-
+@@= skipped -14, +14 lines =@@
 
  //// [privateNameAndIndexSignature.js]
--"use strict";
+ "use strict";
 -var _A_foo;
  class A {
 +    #foo = 3;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js b/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js
index e41c5b451c..aa1e41bba9 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js
@@ -19,6 +19,7 @@ class C {
 }
 
 //// [privateNameAndObjectRestSpread.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js.diff
index d22ac614b7..eef3114332 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameAndObjectRestSpread.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameAndObjectRestSpread.js
 +++ new.privateNameAndObjectRestSpread.js
-@@= skipped -18, +18 lines =@@
- }
+@@= skipped -19, +19 lines =@@
 
  //// [privateNameAndObjectRestSpread.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
@@ -13,7 +12,7 @@
  var __rest = (this && this.__rest) || function (s, e) {
      var t = {};
      for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
-@@= skipped -17, +11 lines =@@
+@@= skipped -16, +11 lines =@@
          }
      return t;
  };
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js b/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js
index 1e65c5ab2a..b6ca0d5e42 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js
@@ -9,6 +9,7 @@ class A {
 
 
 //// [privateNameCircularReference.js]
+"use strict";
 class A {
     #foo = this.#bar;
     #bar = this.#foo;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js.diff
index 5f6525e5a7..80ebf0d0c2 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameCircularReference.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameCircularReference.js
 +++ new.privateNameCircularReference.js
-@@= skipped -8, +8 lines =@@
-
+@@= skipped -9, +9 lines =@@
 
  //// [privateNameCircularReference.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js b/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js
index d760e7bc86..0b0aaf63a3 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js
@@ -406,6 +406,7 @@ function StaticSetter() {
 
 
 //// [privateNameDuplicateField.js]
+"use strict";
 function Field() {
     // Error
     class A_Field_Field {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js.diff
index f85cb974e8..91040ca590 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameDuplicateField.js.diff
@@ -1,10 +1,8 @@
 --- old.privateNameDuplicateField.js
 +++ new.privateNameDuplicateField.js
-@@= skipped -405, +405 lines =@@
-
-
+@@= skipped -407, +407 lines =@@
  //// [privateNameDuplicateField.js]
--"use strict";
+ "use strict";
  function Field() {
 -    var _A_Field_Field_foo, _A_Field_Field_foo_1, _A_Field_Method_instances, _A_Field_Method_foo, _A_Field_Method_foo_1, _A_Field_Getter_instances, _A_Field_Getter_foo, _A_Field_Getter_foo_get, _A_Field_Setter_instances, _A_Field_Setter_foo, _A_Field_Setter_foo_set, _a, _A_Field_StaticField_foo, _A_Field_StaticField_foo_1, _b, _A_Field_StaticMethod_foo, _A_Field_StaticMethod_foo_1, _c, _A_Field_StaticGetter_foo, _A_Field_StaticGetter_foo_get, _d, _A_Field_StaticSetter_foo, _A_Field_StaticSetter_foo_set;
      // Error
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameField.js b/testdata/baselines/reference/submodule/conformance/privateNameField.js
index 4286ee9651..52b878a488 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameField.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameField.js
@@ -10,6 +10,7 @@ class A {
 
 
 //// [privateNameField.js]
+"use strict";
 class A {
     #name;
     constructor(name) {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameField.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameField.js.diff
index fb24c8758a..806ebf5060 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameField.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameField.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameField.js
 +++ new.privateNameField.js
-@@= skipped -9, +9 lines =@@
-
+@@= skipped -10, +10 lines =@@
 
  //// [privateNameField.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
 -    if (kind === "m") throw new TypeError("Private method is not writable");
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js b/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js
index 947f71cd23..ae7f81a9ea 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js
@@ -119,6 +119,7 @@ function badSyntax(v: Foo) {
 
 
 //// [privateNameInInExpression.js]
+"use strict";
 class Foo {
     #field = 1;
     static #staticField = 2;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js.diff
deleted file mode 100644
index 5168d21e9b..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=es2022).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNameInInExpression(target=es2022).js
-+++ new.privateNameInInExpression(target=es2022).js
-@@= skipped -118, +118 lines =@@
-
-
- //// [privateNameInInExpression.js]
--"use strict";
- class Foo {
-     #field = 1;
-     static #staticField = 2;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js b/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js
index 947f71cd23..ae7f81a9ea 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js
@@ -119,6 +119,7 @@ function badSyntax(v: Foo) {
 
 
 //// [privateNameInInExpression.js]
+"use strict";
 class Foo {
     #field = 1;
     static #staticField = 2;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js.diff
deleted file mode 100644
index 60823b90a0..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpression(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNameInInExpression(target=esnext).js
-+++ new.privateNameInInExpression(target=esnext).js
-@@= skipped -118, +118 lines =@@
-
-
- //// [privateNameInInExpression.js]
--"use strict";
- class Foo {
-     #field = 1;
-     static #staticField = 2;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js b/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js
index 95ca4fd234..6241604054 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js
@@ -13,6 +13,7 @@ class Foo {
 
 
 //// [privateNameInInExpressionUnused.js]
+"use strict";
 class Foo {
     #unused; // expect unused error
     #brand; // expect no error
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js.diff
deleted file mode 100644
index cf3aeb4608..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=es2022).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNameInInExpressionUnused(target=es2022).js
-+++ new.privateNameInInExpressionUnused(target=es2022).js
-@@= skipped -12, +12 lines =@@
-
-
- //// [privateNameInInExpressionUnused.js]
--"use strict";
- class Foo {
-     #unused; // expect unused error
-     #brand; // expect no error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js b/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js
index 95ca4fd234..6241604054 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js
@@ -13,6 +13,7 @@ class Foo {
 
 
 //// [privateNameInInExpressionUnused.js]
+"use strict";
 class Foo {
     #unused; // expect unused error
     #brand; // expect no error
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js.diff
deleted file mode 100644
index 244c6e38b7..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNameInInExpressionUnused(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNameInInExpressionUnused(target=esnext).js
-+++ new.privateNameInInExpressionUnused(target=esnext).js
-@@= skipped -12, +12 lines =@@
-
-
- //// [privateNameInInExpressionUnused.js]
--"use strict";
- class Foo {
-     #unused; // expect unused error
-     #brand; // expect no error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameMethod.js b/testdata/baselines/reference/submodule/conformance/privateNameMethod.js
index 05c2089829..2519a261bf 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameMethod.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameMethod.js
@@ -15,6 +15,7 @@ class A1 {
 
 
 //// [privateNameMethod.js]
+"use strict";
 class A1 {
     #method(param) {
         return "";
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameMethod.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameMethod.js.diff
index a74a33233e..ab2365f254 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameMethod.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameMethod.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameMethod.js
 +++ new.privateNameMethod.js
-@@= skipped -14, +14 lines =@@
-
+@@= skipped -15, +15 lines =@@
 
  //// [privateNameMethod.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js b/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js
index 940f5db5e2..039dcedf42 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js
@@ -9,6 +9,7 @@ new A().#foo = 4;               // Error
 
 
 //// [privateNameNotAccessibleOutsideDefiningClass.js]
+"use strict";
 class A {
     #foo = 3;
 }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js.diff
index db774ee59f..0d25350ef0 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameNotAccessibleOutsideDefiningClass.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameNotAccessibleOutsideDefiningClass.js
 +++ new.privateNameNotAccessibleOutsideDefiningClass.js
-@@= skipped -8, +8 lines =@@
-
+@@= skipped -9, +9 lines =@@
 
  //// [privateNameNotAccessibleOutsideDefiningClass.js]
--"use strict";
+ "use strict";
 -var _A_foo;
  class A {
 -    constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js b/testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js
index fb08dcc030..1d9753493f 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js
@@ -5,4 +5,5 @@ const #foo = 3;
 
 
 //// [privateNameNotAllowedOutsideClass.js]
+"use strict";
 const #foo = 3;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js.diff
deleted file mode 100644
index 970426ed77..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNameNotAllowedOutsideClass.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.privateNameNotAllowedOutsideClass.js
-+++ new.privateNameNotAllowedOutsideClass.js
-@@= skipped -4, +4 lines =@@
-
-
- //// [privateNameNotAllowedOutsideClass.js]
--"use strict";
- const #foo = 3;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js b/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js
index c19bdef178..1fcf9d8d4b 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js
@@ -17,6 +17,7 @@ class A1 {
 
 
 //// [privateNameStaticAccessors.js]
+"use strict";
 class A1 {
     static get #prop() { return ""; }
     static set #prop(param) { }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js.diff
index 73824d20d6..b50cfce916 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameStaticAccessors.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameStaticAccessors.js
 +++ new.privateNameStaticAccessors.js
-@@= skipped -16, +16 lines =@@
-
+@@= skipped -17, +17 lines =@@
 
  //// [privateNameStaticAccessors.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
 -    if (kind === "m") throw new TypeError("Private method is not writable");
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js b/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js
index fc5815f666..fe7f56b727 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js
@@ -15,6 +15,7 @@ class A1 {
 
 
 //// [privateNameStaticMethod.js]
+"use strict";
 class A1 {
     static #method(param) {
         return "";
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js.diff b/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js.diff
index 24763af919..edc86aa3b2 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameStaticMethod.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameStaticMethod.js
 +++ new.privateNameStaticMethod.js
-@@= skipped -14, +14 lines =@@
-
+@@= skipped -15, +15 lines =@@
 
  //// [privateNameStaticMethod.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js b/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js
index b26502c7e1..8416aab57c 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js
@@ -33,6 +33,7 @@ class B extends A {
 
 
 //// [privateNameStaticsAndStaticMethods.js]
+"use strict";
 class A {
     static #foo(a) { }
     static async #bar(a) { }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js.diff
deleted file mode 100644
index 72f2ee810d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=es2022).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNameStaticsAndStaticMethods(target=es2022).js
-+++ new.privateNameStaticsAndStaticMethods(target=es2022).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [privateNameStaticsAndStaticMethods.js]
--"use strict";
- class A {
-     static #foo(a) { }
-     static async #bar(a) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js b/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js
index b26502c7e1..8416aab57c 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js
@@ -33,6 +33,7 @@ class B extends A {
 
 
 //// [privateNameStaticsAndStaticMethods.js]
+"use strict";
 class A {
     static #foo(a) { }
     static async #bar(a) { }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js.diff
deleted file mode 100644
index f7b000207c..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNameStaticsAndStaticMethods(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNameStaticsAndStaticMethods(target=esnext).js
-+++ new.privateNameStaticsAndStaticMethods(target=esnext).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [privateNameStaticsAndStaticMethods.js]
--"use strict";
- class A {
-     static #foo(a) { }
-     static async #bar(a) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js
index 1844f2cb06..2ea6926061 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js
@@ -54,6 +54,7 @@ class TestNonStatics {
 }
 
 //// [privateNameWhenNotUseDefineForClassFieldsInEsNext.js]
+"use strict";
 class TestWithStatics {
     #prop = 0;
     static dd = new TestWithStatics().#prop; // OK
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js.diff
index ef432593a8..25f21ed4b3 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js.diff
@@ -1,10 +1,9 @@
 --- old.privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js
 +++ new.privateNameWhenNotUseDefineForClassFieldsInEsNext(target=es2020).js
-@@= skipped -53, +53 lines =@@
- }
+@@= skipped -54, +54 lines =@@
 
  //// [privateNameWhenNotUseDefineForClassFieldsInEsNext.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js
index 1844f2cb06..2ea6926061 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js
@@ -54,6 +54,7 @@ class TestNonStatics {
 }
 
 //// [privateNameWhenNotUseDefineForClassFieldsInEsNext.js]
+"use strict";
 class TestWithStatics {
     #prop = 0;
     static dd = new TestWithStatics().#prop; // OK
diff --git a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js.diff
index fedd9e0750..252a51ff12 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js.diff
@@ -1,10 +1,7 @@
 --- old.privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js
 +++ new.privateNameWhenNotUseDefineForClassFieldsInEsNext(target=esnext).js
-@@= skipped -53, +53 lines =@@
- }
-
- //// [privateNameWhenNotUseDefineForClassFieldsInEsNext.js]
--"use strict";
+@@= skipped -56, +56 lines =@@
+ "use strict";
  class TestWithStatics {
      #prop = 0;
 -    static { this.dd = new TestWithStatics().#prop; } // OK
@@ -26,7 +23,7 @@
          static M() {
              return class {
                  m() {
-@@= skipped -23, +22 lines =@@
+@@= skipped -20, +20 lines =@@
                  }
              };
          }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js b/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js
index 34bd5601b8..44e14ec6ad 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js
@@ -18,6 +18,7 @@ class B extends A {
 
 
 //// [privateNamesAndFields.js]
+"use strict";
 class A {
     #foo;
     constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js.diff
index afe4b0da14..3b8a96ea7d 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndFields.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesAndFields.js
 +++ new.privateNamesAndFields.js
-@@= skipped -17, +17 lines =@@
-
+@@= skipped -18, +18 lines =@@
 
  //// [privateNamesAndFields.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
 -    if (kind === "m") throw new TypeError("Private method is not writable");
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js b/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js
index fa551b1e3b..9a13ec9dda 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js
@@ -30,6 +30,7 @@ b = a;                                    // Error
 
 
 //// [privateNamesAndGenericClasses-2.js]
+"use strict";
 class C {
     #foo;
     #bar() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js.diff
index f58e1df341..1341341fcc 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndGenericClasses-2.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesAndGenericClasses-2.js
 +++ new.privateNamesAndGenericClasses-2.js
-@@= skipped -29, +29 lines =@@
-
+@@= skipped -30, +30 lines =@@
 
  //// [privateNamesAndGenericClasses-2.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js b/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js
index 8055e48995..4ade87f2df 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js
@@ -15,6 +15,7 @@ class C {
 
 
 //// [privateNamesAndIndexedAccess.js]
+"use strict";
 class C {
     foo = 3;
     #bar = 3;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js.diff
index 4cc49f4b13..bf67dbe057 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndIndexedAccess.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesAndIndexedAccess.js
 +++ new.privateNamesAndIndexedAccess.js
-@@= skipped -14, +14 lines =@@
-
+@@= skipped -15, +15 lines =@@
 
  //// [privateNamesAndIndexedAccess.js]
--"use strict";
+ "use strict";
 -var _C_bar;
  class C {
 +    foo = 3;
@@ -15,7 +14,7 @@
          const ok = 3;
          // not supported yet, could support in future:
          const badForNow, #bar;
-@@= skipped -14, +12 lines =@@
+@@= skipped -13, +12 lines =@@
          const badAlways = 3; // Error
      }
  }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js
index b9b1061436..6caf7e41e2 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js
@@ -25,6 +25,7 @@ const willErrorSomeDay: typeof A = class {}; // OK for now
 
 
 //// [privateNamesAndStaticFields.js]
+"use strict";
 class A {
     static #foo;
     static #bar;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js.diff
index c8f847bc2c..007aa61099 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticFields.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesAndStaticFields.js
 +++ new.privateNamesAndStaticFields.js
-@@= skipped -24, +24 lines =@@
-
+@@= skipped -25, +25 lines =@@
 
  //// [privateNamesAndStaticFields.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
 -    if (kind === "m") throw new TypeError("Private method is not writable");
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js
index 52de013a77..ba8ec03aea 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js
@@ -33,6 +33,7 @@ class B extends A {
 
 
 //// [privateNamesAndStaticMethods.js]
+"use strict";
 class A {
     static #foo(a) { }
     static async #bar(a) { }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js.diff
deleted file mode 100644
index fbbb4e81ad..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=es2022).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNamesAndStaticMethods(target=es2022).js
-+++ new.privateNamesAndStaticMethods(target=es2022).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [privateNamesAndStaticMethods.js]
--"use strict";
- class A {
-     static #foo(a) { }
-     static async #bar(a) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js
index 52de013a77..ba8ec03aea 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js
@@ -33,6 +33,7 @@ class B extends A {
 
 
 //// [privateNamesAndStaticMethods.js]
+"use strict";
 class A {
     static #foo(a) { }
     static async #bar(a) { }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js.diff
deleted file mode 100644
index 22324adb95..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndStaticMethods(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNamesAndStaticMethods(target=esnext).js
-+++ new.privateNamesAndStaticMethods(target=esnext).js
-@@= skipped -32, +32 lines =@@
-
-
- //// [privateNamesAndStaticMethods.js]
--"use strict";
- class A {
-     static #foo(a) { }
-     static async #bar(a) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js b/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js
index 75b2915bd3..134db39a2b 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js
@@ -24,6 +24,7 @@ k = "fooProp"; // Error
 
 
 //// [privateNamesAndkeyof.js]
+"use strict";
 class A {
     #fooField = 3;
     #fooMethod() { }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js.diff
index 36085aef1c..1aa4445a10 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAndkeyof.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesAndkeyof.js
 +++ new.privateNamesAndkeyof.js
-@@= skipped -23, +23 lines =@@
-
+@@= skipped -24, +24 lines =@@
 
  //// [privateNamesAndkeyof.js]
--"use strict";
+ "use strict";
 -var _A_instances, _A_fooField, _A_fooMethod, _A_fooProp_get, _A_fooProp_set;
  class A {
 -    constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js b/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js
index 0245a902e9..4efc6d3b2f 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js
@@ -27,6 +27,7 @@ class Foo2 {
 
 
 //// [privateNamesAssertion.js]
+"use strict";
 class Foo {
     #p1 = (v) => {
         if (typeof v !== "string") {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js.diff
deleted file mode 100644
index 54529b2a2a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=es2022).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNamesAssertion(target=es2022).js
-+++ new.privateNamesAssertion(target=es2022).js
-@@= skipped -26, +26 lines =@@
-
-
- //// [privateNamesAssertion.js]
--"use strict";
- class Foo {
-     #p1 = (v) => {
-         if (typeof v !== "string") {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js b/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js
index 0245a902e9..4efc6d3b2f 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js
@@ -27,6 +27,7 @@ class Foo2 {
 
 
 //// [privateNamesAssertion.js]
+"use strict";
 class Foo {
     #p1 = (v) => {
         if (typeof v !== "string") {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js.diff
deleted file mode 100644
index 9ae7b2df29..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNamesAssertion(target=esnext).js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.privateNamesAssertion(target=esnext).js
-+++ new.privateNamesAssertion(target=esnext).js
-@@= skipped -26, +26 lines =@@
-
-
- //// [privateNamesAssertion.js]
--"use strict";
- class Foo {
-     #p1 = (v) => {
-         if (typeof v !== "string") {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js b/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js
index dc49af5c15..bbdbb18648 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js
@@ -30,6 +30,7 @@ b = a;                                    // Error
 
 
 //// [privateNamesInGenericClasses.js]
+"use strict";
 class C {
     #foo;
     #method() { return this.#foo; }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js.diff
index 0dd33e5d44..82b237ddb3 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesInGenericClasses.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesInGenericClasses.js
 +++ new.privateNamesInGenericClasses.js
-@@= skipped -29, +29 lines =@@
-
+@@= skipped -30, +30 lines =@@
 
  //// [privateNamesInGenericClasses.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js
index db6b1e818d..fc02dfe2cf 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js
@@ -29,6 +29,7 @@ new A().method();
 
 
 //// [privateNamesInNestedClasses-1.js]
+"use strict";
 class A {
     #foo = "A's #foo";
     #bar = "A's #bar";
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js.diff
index 2c2b294168..5a7d10b772 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-1.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesInNestedClasses-1.js
 +++ new.privateNamesInNestedClasses-1.js
-@@= skipped -28, +28 lines =@@
-
+@@= skipped -29, +29 lines =@@
 
  //// [privateNamesInNestedClasses-1.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
@@ -42,7 +41,7 @@
          const a = new A();
          new B().bar(a);
          new B().baz(a);
-@@= skipped -36, +23 lines =@@
+@@= skipped -35, +23 lines =@@
          new B().quux(b);
      }
  }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js
index ec7135c231..e2e0fd538a 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js
@@ -19,6 +19,7 @@ class A {
 
 
 //// [privateNamesInNestedClasses-2.js]
+"use strict";
 class A {
     static #x = 5;
     constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js.diff
index e47ef6ae74..b239f4e916 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesInNestedClasses-2.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesInNestedClasses-2.js
 +++ new.privateNamesInNestedClasses-2.js
-@@= skipped -18, +18 lines =@@
-
+@@= skipped -19, +19 lines =@@
 
  //// [privateNamesInNestedClasses-2.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js
index cbeec3f862..fe69bf48ea 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js
@@ -37,6 +37,7 @@ abstract class B {
 
 
 //// [privateNamesIncompatibleModifiers.js]
+"use strict";
 class A {
     #foo = 3; // Error
     #bar = 3; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js.diff
index dd16b17b5c..b4307b2562 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiers.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesIncompatibleModifiers.js
 +++ new.privateNamesIncompatibleModifiers.js
-@@= skipped -36, +36 lines =@@
-
+@@= skipped -37, +37 lines =@@
 
  //// [privateNamesIncompatibleModifiers.js]
--"use strict";
+ "use strict";
 -var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
 -    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
 -    return new (P || (P = Promise))(function (resolve, reject) {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js
index 8af06915e9..c6553505c2 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js
@@ -62,6 +62,7 @@ class A {
 
 
 //// [privateNamesIncompatibleModifiersJs.js]
+"use strict";
 class A {
     /**
      * @public
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js.diff
index 2cfcf8c3d0..1203d8035a 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesIncompatibleModifiersJs.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesIncompatibleModifiersJs.js
 +++ new.privateNamesIncompatibleModifiersJs.js
-@@= skipped -61, +61 lines =@@
-
+@@= skipped -62, +62 lines =@@
 
  //// [privateNamesIncompatibleModifiersJs.js]
--"use strict";
+ "use strict";
 -var _A_instances, _A_a, _A_b, _A_c, _A_aMethod, _A_bMethod, _A_cMethod, _A_aProp_get, _A_aProp_set, _A_bProp_get, _A_bProp_set, _A_cProp_get, _A_cProp_set;
  class A {
 -    constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js b/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js
index ea8cdeff8c..72bca37598 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js
@@ -10,6 +10,7 @@ class A {
 
 
 //// [privateNamesNoDelete.js]
+"use strict";
 class A {
     #v = 1;
     constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js.diff
index ea6d3324a1..2c18c84cfe 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesNoDelete.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesNoDelete.js
 +++ new.privateNamesNoDelete.js
-@@= skipped -9, +9 lines =@@
-
+@@= skipped -10, +10 lines =@@
 
  //// [privateNamesNoDelete.js]
--"use strict";
+ "use strict";
 -var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
 -    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
 -    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js b/testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js
index 4cb7954fc7..99958c67b3 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js
@@ -5,4 +5,5 @@ const #foo = 3;
 
 
 //// [privateNamesNotAllowedInVariableDeclarations.js]
+"use strict";
 const #foo = 3;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js.diff
deleted file mode 100644
index e459beff1d..0000000000
--- a/testdata/baselines/reference/submodule/conformance/privateNamesNotAllowedInVariableDeclarations.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.privateNamesNotAllowedInVariableDeclarations.js
-+++ new.privateNamesNotAllowedInVariableDeclarations.js
-@@= skipped -4, +4 lines =@@
-
-
- //// [privateNamesNotAllowedInVariableDeclarations.js]
--"use strict";
- const #foo = 3;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js
index fa7402ccff..65f17c509b 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js
@@ -13,6 +13,7 @@ const b: A = new B();     // Error: Property #foo is missing
 
 
 //// [privateNamesUnique-1.js]
+"use strict";
 class A {
     #foo;
 }
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js.diff
index f10c1f6ebb..564b21bd37 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-1.js.diff
@@ -1,10 +1,9 @@
 --- old.privateNamesUnique-1.js
 +++ new.privateNamesUnique-1.js
-@@= skipped -12, +12 lines =@@
-
+@@= skipped -13, +13 lines =@@
 
  //// [privateNamesUnique-1.js]
--"use strict";
+ "use strict";
 -var _A_foo, _B_foo;
  class A {
 -    constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js
index 411eeabed2..9a9cfeb170 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js
@@ -16,6 +16,7 @@ const b: A2 = new B();
 
 
 //// [privateNamesUnique-5.js]
+"use strict";
 // same as privateNamesUnique-1, but with an interface
 class A {
     #foo;
diff --git a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js.diff b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js.diff
index f565316124..7132f02a9c 100644
--- a/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/privateNamesUnique-5.js.diff
@@ -1,10 +1,8 @@
 --- old.privateNamesUnique-5.js
 +++ new.privateNamesUnique-5.js
-@@= skipped -15, +15 lines =@@
-
-
+@@= skipped -17, +17 lines =@@
  //// [privateNamesUnique-5.js]
--"use strict";
+ "use strict";
  // same as privateNamesUnique-1, but with an interface
 -var _A_foo, _B_foo;
  class A {
diff --git a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js b/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js
index 348c97328e..ecbbdc6bf4 100644
--- a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js
+++ b/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js
@@ -32,6 +32,7 @@ for (obj?.a.b of []);
 
 
 //// [propertyAccessChain.3.js]
+"use strict";
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
diff --git a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js.diff b/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js.diff
index 840ceecf8c..0b0ffe76b6 100644
--- a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/propertyAccessChain.3.js.diff
@@ -1,14 +1,6 @@
 --- old.propertyAccessChain.3.js
 +++ new.propertyAccessChain.3.js
-@@= skipped -31, +31 lines =@@
-
-
- //// [propertyAccessChain.3.js]
--"use strict";
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-     for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
-@@= skipped -12, +11 lines =@@
+@@= skipped -43, +43 lines =@@
          }
      return t;
  };
diff --git a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.js b/testdata/baselines/reference/submodule/conformance/propertyAccessChain.js
index f24285c355..fb0bed6487 100644
--- a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.js
+++ b/testdata/baselines/reference/submodule/conformance/propertyAccessChain.js
@@ -28,6 +28,7 @@ o2?.b!.c;
 o2?.b!.c!;
 
 //// [propertyAccessChain.js]
+"use strict";
 var _a, _b, _c, _d, _e, _f;
 o1 === null || o1 === void 0 ? void 0 : o1.b;
 o2 === null || o2 === void 0 ? void 0 : o2.b.c;
diff --git a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.js.diff b/testdata/baselines/reference/submodule/conformance/propertyAccessChain.js.diff
deleted file mode 100644
index 4eefae7a85..0000000000
--- a/testdata/baselines/reference/submodule/conformance/propertyAccessChain.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.propertyAccessChain.js
-+++ new.propertyAccessChain.js
-@@= skipped -27, +27 lines =@@
- o2?.b!.c!;
-
- //// [propertyAccessChain.js]
--"use strict";
- var _a, _b, _c, _d, _e, _f;
- o1 === null || o1 === void 0 ? void 0 : o1.b;
- o2 === null || o2 === void 0 ? void 0 : o2.b.c;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js b/testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js
index cb87f6bfde..1d3eaf8d63 100644
--- a/testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js
+++ b/testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js
@@ -24,6 +24,7 @@ function foo(options?: { a: string, b: number }) {
 
 
 //// [propertyAccessWidening.js]
+"use strict";
 // Repro from #31762
 function g1(headerNames) {
     let t = [{ hasLineBreak: false, cells: [] }];
diff --git a/testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js.diff b/testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js.diff
deleted file mode 100644
index 42973ac914..0000000000
--- a/testdata/baselines/reference/submodule/conformance/propertyAccessWidening.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.propertyAccessWidening.js
-+++ new.propertyAccessWidening.js
-@@= skipped -23, +23 lines =@@
-
-
- //// [propertyAccessWidening.js]
--"use strict";
- // Repro from #31762
- function g1(headerNames) {
-     let t = [{ hasLineBreak: false, cells: [] }];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js
index 4452ca285a..88f8779a97 100644
--- a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js
+++ b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js
@@ -40,6 +40,7 @@ delete v[0 + 1]; // Error
 
 
 //// [readonlyArraysAndTuples.js]
+"use strict";
 function f1(ma, ra, mt, rt) {
     ma = ra; // Error
     ma = mt;
diff --git a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js.diff b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js.diff
index 31b94cceea..5ae99fc35b 100644
--- a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples.js.diff
@@ -1,14 +1,6 @@
 --- old.readonlyArraysAndTuples.js
 +++ new.readonlyArraysAndTuples.js
-@@= skipped -39, +39 lines =@@
-
-
- //// [readonlyArraysAndTuples.js]
--"use strict";
- function f1(ma, ra, mt, rt) {
-     ma = ra; // Error
-     ma = mt;
-@@= skipped -33, +32 lines =@@
+@@= skipped -72, +72 lines =@@
  type T21 = readonly [number, number];
  type T30 = readonly string;
  type T31<T> = readonly T;
diff --git a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js
index 315c5f314c..a5139717db 100644
--- a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js
+++ b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js
@@ -22,6 +22,7 @@ class A {
 
 
 //// [readonlyArraysAndTuples2.js]
+"use strict";
 class A {
     @someDec
     j = [];
diff --git a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js.diff b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js.diff
index 569916dce3..e8df89c12c 100644
--- a/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/readonlyArraysAndTuples2.js.diff
@@ -1,10 +1,9 @@
 --- old.readonlyArraysAndTuples2.js
 +++ new.readonlyArraysAndTuples2.js
-@@= skipped -21, +21 lines =@@
-
+@@= skipped -22, +22 lines =@@
 
  //// [readonlyArraysAndTuples2.js]
--"use strict";
+ "use strict";
 -var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
 -    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
 -    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
diff --git a/testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js b/testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js
index 66de307136..42ecc0b373 100644
--- a/testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js
+++ b/testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js
@@ -30,6 +30,7 @@ function f4(...args: readonly string[]) {
 
 
 //// [readonlyRestParameters.js]
+"use strict";
 function f0(a, b) {
     f0(a, b);
     f1(a, b);
diff --git a/testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js.diff b/testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js.diff
deleted file mode 100644
index 1a7a50589c..0000000000
--- a/testdata/baselines/reference/submodule/conformance/readonlyRestParameters.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.readonlyRestParameters.js
-+++ new.readonlyRestParameters.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [readonlyRestParameters.js]
--"use strict";
- function f0(a, b) {
-     f0(a, b);
-     f1(a, b);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js b/testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js
index b3b7058e4b..b77031232a 100644
--- a/testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js
+++ b/testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js
@@ -133,6 +133,7 @@ function level(h: HTMLHeadingElement): number {
 
 
 //// [recursiveTypeReferences1.js]
+"use strict";
 const a0 = 1;
 const a1 = [1, [2, 3], [4, [5, [6, 7]]]];
 const hypertextNode = ["div", { id: "parent" },
diff --git a/testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js.diff b/testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js.diff
deleted file mode 100644
index 9fd34c28f6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/recursiveTypeReferences1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.recursiveTypeReferences1.js
-+++ new.recursiveTypeReferences1.js
-@@= skipped -132, +132 lines =@@
-
-
- //// [recursiveTypeReferences1.js]
--"use strict";
- const a0 = 1;
- const a1 = [1, [2, 3], [4, [5, [6, 7]]]];
- const hypertextNode = ["div", { id: "parent" },
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/restTupleElements1.js b/testdata/baselines/reference/submodule/conformance/restTupleElements1.js
index dae75d0b14..e3f495d5d6 100644
--- a/testdata/baselines/reference/submodule/conformance/restTupleElements1.js
+++ b/testdata/baselines/reference/submodule/conformance/restTupleElements1.js
@@ -72,6 +72,7 @@ f2(x => x * 2, x => x.length, x => x.charCodeAt(0));
 
 
 //// [restTupleElements1.js]
+"use strict";
 assign();
 assign();
 assign();
diff --git a/testdata/baselines/reference/submodule/conformance/restTupleElements1.js.diff b/testdata/baselines/reference/submodule/conformance/restTupleElements1.js.diff
index 52f515d906..8c4187dbe0 100644
--- a/testdata/baselines/reference/submodule/conformance/restTupleElements1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/restTupleElements1.js.diff
@@ -1,14 +1,6 @@
 --- old.restTupleElements1.js
 +++ new.restTupleElements1.js
-@@= skipped -71, +71 lines =@@
-
-
- //// [restTupleElements1.js]
--"use strict";
- assign();
- assign();
- assign();
-@@= skipped -38, +37 lines =@@
+@@= skipped -109, +109 lines =@@
  type T06 = [string, ...string[]];
  type T07 = [...string[], string];
  type T08 = [...string];
diff --git a/testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js b/testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js
index 718351bbcc..492cb8deda 100644
--- a/testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js
+++ b/testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js
@@ -102,6 +102,7 @@ const funcUnionTupleRest: TupleUnionFunc = (...params) => {
 
 
 //// [restTuplesFromContextualTypes.js]
+"use strict";
 (function (a, b, c) { })(...t1);
 (function (...x) { })(...t1);
 (function (a, ...x) { })(...t1);
diff --git a/testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js.diff b/testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js.diff
deleted file mode 100644
index 38d5a7fc74..0000000000
--- a/testdata/baselines/reference/submodule/conformance/restTuplesFromContextualTypes.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.restTuplesFromContextualTypes.js
-+++ new.restTuplesFromContextualTypes.js
-@@= skipped -101, +101 lines =@@
-
-
- //// [restTuplesFromContextualTypes.js]
--"use strict";
- (function (a, b, c) { })(...t1);
- (function (...x) { })(...t1);
- (function (a, ...x) { })(...t1);
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/spreadDuplicate.js b/testdata/baselines/reference/submodule/conformance/spreadDuplicate.js
index b7f7c49dad..76a4788551 100644
--- a/testdata/baselines/reference/submodule/conformance/spreadDuplicate.js
+++ b/testdata/baselines/reference/submodule/conformance/spreadDuplicate.js
@@ -22,6 +22,7 @@ let d2 = { a: 123, ...(t ? d : {}) };  // string | number
 
 
 //// [spreadDuplicate.js]
+"use strict";
 // Repro from #44438
 let a1 = Object.assign({ a: 123 }, a); // string (Error)
 let b1 = Object.assign({ a: 123 }, b); // string | number
diff --git a/testdata/baselines/reference/submodule/conformance/spreadDuplicate.js.diff b/testdata/baselines/reference/submodule/conformance/spreadDuplicate.js.diff
deleted file mode 100644
index 91820ee714..0000000000
--- a/testdata/baselines/reference/submodule/conformance/spreadDuplicate.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadDuplicate.js
-+++ new.spreadDuplicate.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [spreadDuplicate.js]
--"use strict";
- // Repro from #44438
- let a1 = Object.assign({ a: 123 }, a); // string (Error)
- let b1 = Object.assign({ a: 123 }, b); // string | number
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js b/testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js
index 694763ab0e..4792617b84 100644
--- a/testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js
+++ b/testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js
@@ -22,6 +22,7 @@ let d2 = { a: 123, ...(t ? d : {}) };  // string | number | undefined
 
 
 //// [spreadDuplicateExact.js]
+"use strict";
 // Repro from #44438
 let a1 = Object.assign({ a: 123 }, a); // string (Error)
 let b1 = Object.assign({ a: 123 }, b); // string | number
diff --git a/testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js.diff b/testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js.diff
deleted file mode 100644
index 0440f63624..0000000000
--- a/testdata/baselines/reference/submodule/conformance/spreadDuplicateExact.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadDuplicateExact.js
-+++ new.spreadDuplicateExact.js
-@@= skipped -21, +21 lines =@@
-
-
- //// [spreadDuplicateExact.js]
--"use strict";
- // Repro from #44438
- let a1 = Object.assign({ a: 123 }, a); // string (Error)
- let b1 = Object.assign({ a: 123 }, b); // string | number
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js b/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js
index e24f9e8f40..b2c7718f17 100644
--- a/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js
+++ b/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js
@@ -54,6 +54,7 @@ class Foo<T extends string> {
 
 
 //// [spreadObjectOrFalsy.js]
+"use strict";
 function f1(a) {
     return Object.assign({}, a); // Error
 }
diff --git a/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js.diff b/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js.diff
index bb8b152bab..e2ffcb6fd4 100644
--- a/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/spreadObjectOrFalsy.js.diff
@@ -1,14 +1,6 @@
 --- old.spreadObjectOrFalsy.js
 +++ new.spreadObjectOrFalsy.js
-@@= skipped -53, +53 lines =@@
-
-
- //// [spreadObjectOrFalsy.js]
--"use strict";
- function f1(a) {
-     return Object.assign({}, a); // Error
- }
-@@= skipped -25, +24 lines =@@
+@@= skipped -78, +78 lines =@@
      return Object.assign({}, z);
  }
  class Foo {
diff --git a/testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js b/testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js
index 0c51c4fb7f..8a61a76dc2 100644
--- a/testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js
+++ b/testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js
@@ -37,6 +37,7 @@ function m(anyoptional: { a?: any }) {
 
 
 //// [spreadOverwritesPropertyStrict.js]
+"use strict";
 var unused1 = Object.assign({ b: 1 }, ab); // error
 var unused2 = Object.assign(Object.assign({}, ab), ab); // ok, overwritten error doesn't apply to spreads
 var unused3 = Object.assign({ b: 1 }, abq); // ok, abq might have b: undefined
diff --git a/testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js.diff b/testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js.diff
deleted file mode 100644
index 9cfa3da7a4..0000000000
--- a/testdata/baselines/reference/submodule/conformance/spreadOverwritesPropertyStrict.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.spreadOverwritesPropertyStrict.js
-+++ new.spreadOverwritesPropertyStrict.js
-@@= skipped -36, +36 lines =@@
-
-
- //// [spreadOverwritesPropertyStrict.js]
--"use strict";
- var unused1 = Object.assign({ b: 1 }, ab); // error
- var unused2 = Object.assign(Object.assign({}, ab), ab); // ok, overwritten error doesn't apply to spreads
- var unused3 = Object.assign({ b: 1 }, abq); // ok, abq might have b: undefined
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js b/testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js
index 4682280a91..226d84a3eb 100644
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js
+++ b/testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js
@@ -30,6 +30,7 @@ const h = DD[42]
 
 
 //// [staticIndexSignature3.js]
+"use strict";
 class B {
 }
 class D extends B {
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js.diff b/testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js.diff
deleted file mode 100644
index 55d5c32441..0000000000
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.staticIndexSignature3.js
-+++ new.staticIndexSignature3.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [staticIndexSignature3.js]
--"use strict";
- class B {
- }
- class D extends B {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js b/testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js
index a1722855c7..8a9a7edf03 100644
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js
+++ b/testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js
@@ -39,6 +39,7 @@ if (v === 0) {
 
 
 //// [staticIndexSignature4.js]
+"use strict";
 class B {
 }
 class D {
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js.diff b/testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js.diff
deleted file mode 100644
index a77ecd880a..0000000000
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.staticIndexSignature4.js
-+++ new.staticIndexSignature4.js
-@@= skipped -38, +38 lines =@@
-
-
- //// [staticIndexSignature4.js]
--"use strict";
- class B {
- }
- class D {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js b/testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js
index ca96a13353..0d32a4f5dc 100644
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js
+++ b/testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js
@@ -26,5 +26,6 @@ type TGI = Omit<I, number>
 
 
 //// [staticIndexSignature5.js]
+"use strict";
 class B {
 }
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js.diff b/testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js.diff
deleted file mode 100644
index d4066cf314..0000000000
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature5.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.staticIndexSignature5.js
-+++ new.staticIndexSignature5.js
-@@= skipped -25, +25 lines =@@
-
-
- //// [staticIndexSignature5.js]
--"use strict";
- class B {
- }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js b/testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js
index 86cc731c90..fd01e53460 100644
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js
+++ b/testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js
@@ -20,6 +20,7 @@ const c = new C<number>();
 c.foo(1);
 
 //// [staticIndexSignature6.js]
+"use strict";
 function foo() {
     return class {
         foo(v) { return v; }
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js.diff b/testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js.diff
deleted file mode 100644
index 34c2f142d4..0000000000
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature6.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.staticIndexSignature6.js
-+++ new.staticIndexSignature6.js
-@@= skipped -19, +19 lines =@@
- c.foo(1);
-
- //// [staticIndexSignature6.js]
--"use strict";
- function foo() {
-     return class {
-         foo(v) { return v; }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js b/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js
index e6fee77f01..a9ae8947fe 100644
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js
+++ b/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js
@@ -12,6 +12,7 @@ class Y {
 
 
 //// [staticIndexSignature7.js]
+"use strict";
 class X {
     static x = 12; // Should error, incompatible with index signature
 }
diff --git a/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js.diff b/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js.diff
index fbc1cfc8f8..1e8adc8ea5 100644
--- a/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/staticIndexSignature7.js.diff
@@ -1,10 +1,8 @@
 --- old.staticIndexSignature7.js
 +++ new.staticIndexSignature7.js
-@@= skipped -11, +11 lines =@@
-
-
+@@= skipped -13, +13 lines =@@
  //// [staticIndexSignature7.js]
--"use strict";
+ "use strict";
  class X {
 +    static x = 12; // Should error, incompatible with index signature
  }
diff --git a/testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js b/testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js
index f18fccd9a0..34d7e4f91f 100644
--- a/testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js
+++ b/testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js
@@ -103,6 +103,7 @@ class Bar<T extends 1 | 2> {
 
 
 //// [strictBindCallApply1.js]
+"use strict";
 let f00 = foo.bind(undefined);
 let f01 = foo.bind(undefined, 10);
 let f02 = foo.bind(undefined, 10, "hello");
diff --git a/testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js.diff b/testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js.diff
deleted file mode 100644
index 19db701378..0000000000
--- a/testdata/baselines/reference/submodule/conformance/strictBindCallApply1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.strictBindCallApply1.js
-+++ new.strictBindCallApply1.js
-@@= skipped -102, +102 lines =@@
-
-
- //// [strictBindCallApply1.js]
--"use strict";
- let f00 = foo.bind(undefined);
- let f01 = foo.bind(undefined, 10);
- let f02 = foo.bind(undefined, 10, "hello");
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js b/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js
index 1646430cbc..8d774745b4 100644
--- a/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js
+++ b/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js
@@ -163,6 +163,7 @@ class C13 {
 
 
 //// [strictPropertyInitialization.js]
+"use strict";
 // Properties with non-undefined types require initialization
 class C1 {
     a; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js.diff b/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js.diff
index 0dc4bc7f0f..a063942f4e 100644
--- a/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/strictPropertyInitialization.js.diff
@@ -1,10 +1,8 @@
 --- old.strictPropertyInitialization.js
 +++ new.strictPropertyInitialization.js
-@@= skipped -162, +162 lines =@@
-
-
+@@= skipped -164, +164 lines =@@
  //// [strictPropertyInitialization.js]
--"use strict";
+ "use strict";
  // Properties with non-undefined types require initialization
 -var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
 -    if (kind === "m") throw new TypeError("Private method is not writable");
@@ -112,7 +110,7 @@
  }
  // No strict initialization checks for abstract members
  class C9 {
-@@= skipped -81, +73 lines =@@
+@@= skipped -79, +72 lines =@@
  // Properties with non-undefined types must be assigned before they can be accessed
  // within their constructor
  class C10 {
diff --git a/testdata/baselines/reference/submodule/conformance/superMethodCall.js b/testdata/baselines/reference/submodule/conformance/superMethodCall.js
index 25cd8a0890..8e6031d385 100644
--- a/testdata/baselines/reference/submodule/conformance/superMethodCall.js
+++ b/testdata/baselines/reference/submodule/conformance/superMethodCall.js
@@ -16,6 +16,7 @@ class Derived extends Base {
 }
 
 //// [superMethodCall.js]
+"use strict";
 class Base {
     method() { }
 }
diff --git a/testdata/baselines/reference/submodule/conformance/superMethodCall.js.diff b/testdata/baselines/reference/submodule/conformance/superMethodCall.js.diff
index 4fe90e06ad..447064340f 100644
--- a/testdata/baselines/reference/submodule/conformance/superMethodCall.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/superMethodCall.js.diff
@@ -1,10 +1,9 @@
 --- old.superMethodCall.js
 +++ new.superMethodCall.js
-@@= skipped -15, +15 lines =@@
- }
+@@= skipped -16, +16 lines =@@
 
  //// [superMethodCall.js]
--"use strict";
+ "use strict";
 -var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
 -    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
 -    return new (P || (P = Promise))(function (resolve, reject) {
@@ -17,7 +16,7 @@
  class Base {
      method() { }
  }
-@@= skipped -18, +8 lines =@@
+@@= skipped -17, +8 lines =@@
          var _a;
          return (_a = super.method) === null || _a === void 0 ? void 0 : _a.call(this);
      }
diff --git a/testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js b/testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js
index afb484ef47..2be4101134 100644
--- a/testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js
+++ b/testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js
@@ -16,6 +16,7 @@ function function1<T extends 'a' | 'b'>(key: T) {
 
 
 //// [switchWithConstrainedTypeVariable.js]
+"use strict";
 // Repro from #20840
 function function1(key) {
     switch (key) {
diff --git a/testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js.diff b/testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js.diff
deleted file mode 100644
index 4fc7c57795..0000000000
--- a/testdata/baselines/reference/submodule/conformance/switchWithConstrainedTypeVariable.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.switchWithConstrainedTypeVariable.js
-+++ new.switchWithConstrainedTypeVariable.js
-@@= skipped -15, +15 lines =@@
-
-
- //// [switchWithConstrainedTypeVariable.js]
--"use strict";
- // Repro from #20840
- function function1(key) {
-     switch (key) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js
index e120e73972..ef10f08155 100644
--- a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js
+++ b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js
@@ -122,6 +122,7 @@ C2(`rotate(${interpolatedStyle.rotate}dig)`);
 
 
 //// [templateLiteralTypes2.js]
+"use strict";
 function ft1(s, n, u, t) {
     const c1 = `abc${s}`;
     const c2 = `abc${n}`;
diff --git a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js.diff b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js.diff
deleted file mode 100644
index c73545d827..0000000000
--- a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.templateLiteralTypes2.js
-+++ new.templateLiteralTypes2.js
-@@= skipped -121, +121 lines =@@
-
-
- //// [templateLiteralTypes2.js]
--"use strict";
- function ft1(s, n, u, t) {
-     const c1 = `abc${s}`;
-     const c2 = `abc${n}`;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js
index 96b21945c9..3cf90aac1a 100644
--- a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js
+++ b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js
@@ -206,6 +206,7 @@ function a<T extends {id: string}>() {
 
 
 //// [templateLiteralTypes3.js]
+"use strict";
 // Inference from template literal type to template literal type
 function f1(s, n, b, t) {
     let x1 = foo1('hello'); // Error
diff --git a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js.diff b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js.diff
deleted file mode 100644
index a11d2002bd..0000000000
--- a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes3.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.templateLiteralTypes3.js
-+++ new.templateLiteralTypes3.js
-@@= skipped -205, +205 lines =@@
-
-
- //// [templateLiteralTypes3.js]
--"use strict";
- // Inference from template literal type to template literal type
- function f1(s, n, b, t) {
-     let x1 = foo1('hello'); // Error
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js
index 8651651d92..c97798a1ec 100644
--- a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js
+++ b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js
@@ -307,6 +307,7 @@ f4("**false**"); // false | "false"
 
 
 //// [templateLiteralTypes4.js]
+"use strict";
 p.getIndex(0); // ok, 0 is a valid index
 p.getIndex(1); // ok, 1 is a valid index
 p.getIndex(2); // error, 2 is not a valid index
diff --git a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js.diff b/testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js.diff
deleted file mode 100644
index c3cbe3d19f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/templateLiteralTypes4.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.templateLiteralTypes4.js
-+++ new.templateLiteralTypes4.js
-@@= skipped -306, +306 lines =@@
-
-
- //// [templateLiteralTypes4.js]
--"use strict";
- p.getIndex(0); // ok, 0 is a valid index
- p.getIndex(1); // ok, 1 is a valid index
- p.getIndex(2); // error, 2 is not a valid index
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/thisMethodCall.js b/testdata/baselines/reference/submodule/conformance/thisMethodCall.js
index b23f2d6d8e..4f9c6dd4c6 100644
--- a/testdata/baselines/reference/submodule/conformance/thisMethodCall.js
+++ b/testdata/baselines/reference/submodule/conformance/thisMethodCall.js
@@ -9,6 +9,7 @@ class C {
 }
 
 //// [thisMethodCall.js]
+"use strict";
 class C {
     method() { }
     other() {
diff --git a/testdata/baselines/reference/submodule/conformance/thisMethodCall.js.diff b/testdata/baselines/reference/submodule/conformance/thisMethodCall.js.diff
deleted file mode 100644
index ac38755036..0000000000
--- a/testdata/baselines/reference/submodule/conformance/thisMethodCall.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.thisMethodCall.js
-+++ new.thisMethodCall.js
-@@= skipped -8, +8 lines =@@
- }
-
- //// [thisMethodCall.js]
--"use strict";
- class C {
-     method() { }
-     other() {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js b/testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js
index 33289c8e9a..cfa663611c 100644
--- a/testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js
+++ b/testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js
@@ -245,6 +245,7 @@ vue.hello;
 
 
 //// [thisTypeInObjectLiterals2.js]
+"use strict";
 // In methods of an object literal with no contextual type, 'this' has the type
 // of the object literal.
 let obj1 = {
diff --git a/testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js.diff b/testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js.diff
deleted file mode 100644
index 91fd7b25de..0000000000
--- a/testdata/baselines/reference/submodule/conformance/thisTypeInObjectLiterals2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.thisTypeInObjectLiterals2.js
-+++ new.thisTypeInObjectLiterals2.js
-@@= skipped -244, +244 lines =@@
-
-
- //// [thisTypeInObjectLiterals2.js]
--"use strict";
- // In methods of an object literal with no contextual type, 'this' has the type
- // of the object literal.
- let obj1 = {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js b/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js
index 443f800ed0..69b40fc6df 100644
--- a/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js
+++ b/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js
@@ -128,6 +128,7 @@ const aa = <JustDefaultPropsWithSpecifiedGeneric />;
 
 
 //// [tsxLibraryManagedAttributes.jsx]
+"use strict";
 class Component extends ReactComponent {
     static propTypes = {
         foo: PropTypes.number,
diff --git a/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js.diff b/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js.diff
index 649d023653..03c2003d1f 100644
--- a/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/tsxLibraryManagedAttributes.js.diff
@@ -1,10 +1,8 @@
 --- old.tsxLibraryManagedAttributes.js
 +++ new.tsxLibraryManagedAttributes.js
-@@= skipped -127, +127 lines =@@
-
-
+@@= skipped -129, +129 lines =@@
  //// [tsxLibraryManagedAttributes.jsx]
--"use strict";
+ "use strict";
  class Component extends ReactComponent {
 +    static propTypes = {
 +        foo: PropTypes.number,
@@ -26,7 +24,7 @@
  const a = <Component foo={12} bar="yes" baz="yeah"/>;
  const b = <Component foo={12}/>; // Error, missing required prop bar
  const c = <Component bar="yes" baz="yeah"/>;
-@@= skipped -18, +17 lines =@@
+@@= skipped -16, +16 lines =@@
  const e = <Component foo={12} bar={null} baz="cool"/>; // bar is nullable/undefinable since it's not marked `isRequired`
  const f = <Component foo={12} bar="yeah" baz={null}/>; // Error, baz is _not_ nullable/undefinable since it's marked `isRequired`
  class JustPropTypes extends ReactComponent {
diff --git a/testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js b/testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js
index ea5f7bd18d..8ab2c7ffe5 100644
--- a/testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js
+++ b/testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js
@@ -15,6 +15,7 @@ const f = <div { ...c } />
 
 
 //// [a.jsx]
+"use strict";
 const a = {};
 const b = null;
 const c = undefined;
diff --git a/testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js.diff b/testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js.diff
deleted file mode 100644
index b8464ff9bd..0000000000
--- a/testdata/baselines/reference/submodule/conformance/tsxSpreadInvalidType.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.tsxSpreadInvalidType.js
-+++ new.tsxSpreadInvalidType.js
-@@= skipped -14, +14 lines =@@
-
-
- //// [a.jsx]
--"use strict";
- const a = {};
- const b = null;
- const c = undefined;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js b/testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js
index 8bea164f1e..fd7398ece7 100644
--- a/testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js
+++ b/testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js
@@ -76,6 +76,7 @@ g.both
 
 
 //// [typeFromPropertyAssignment36.js]
+"use strict";
 function f(b) {
     function d() {
     }
diff --git a/testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js.diff b/testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js.diff
deleted file mode 100644
index 7874236e32..0000000000
--- a/testdata/baselines/reference/submodule/conformance/typeFromPropertyAssignment36.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeFromPropertyAssignment36.js
-+++ new.typeFromPropertyAssignment36.js
-@@= skipped -75, +75 lines =@@
-
-
- //// [typeFromPropertyAssignment36.js]
--"use strict";
- function f(b) {
-     function d() {
-     }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js b/testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js
index 77435f3b20..afc2e9e26a 100644
--- a/testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js
+++ b/testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js
@@ -187,6 +187,7 @@ fn1({ foo: ["hello", 123] }, { foo: [true]});
 
 
 //// [typeParameterConstModifiers.js]
+"use strict";
 const x11 = f1('a');
 const x12 = f1(['a', ['b', 'c']]);
 const x13 = f1({ a: 1, b: "c", d: ["e", 2, true, { f: "g" }] });
diff --git a/testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js.diff b/testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js.diff
deleted file mode 100644
index 9be78e94f6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/typeParameterConstModifiers.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeParameterConstModifiers.js
-+++ new.typeParameterConstModifiers.js
-@@= skipped -186, +186 lines =@@
-
-
- //// [typeParameterConstModifiers.js]
--"use strict";
- const x11 = f1('a');
- const x12 = f1(['a', ['b', 'c']]);
- const x13 = f1({ a: 1, b: "c", d: ["e", 2, true, { f: "g" }] });
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js b/testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js
index e805911dc1..3b3d67f45c 100644
--- a/testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js
+++ b/testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js
@@ -11,6 +11,7 @@ let obj: { f(s: string): void } & Record<string, unknown> = {
 
 
 //// [typeSatisfaction_contextualTyping2.js]
+"use strict";
 let obj = {
     f(s) { }, // "incorrect" implicit any on 's'
     g(s) { }
diff --git a/testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js.diff b/testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js.diff
deleted file mode 100644
index 8f6ae9acb5..0000000000
--- a/testdata/baselines/reference/submodule/conformance/typeSatisfaction_contextualTyping2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typeSatisfaction_contextualTyping2.js
-+++ new.typeSatisfaction_contextualTyping2.js
-@@= skipped -10, +10 lines =@@
-
-
- //// [typeSatisfaction_contextualTyping2.js]
--"use strict";
- let obj = {
-     f(s) { }, // "incorrect" implicit any on 's'
-     g(s) { }
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js b/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js
index 90daac9677..60373b4f89 100644
--- a/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js
+++ b/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js
@@ -82,6 +82,7 @@ function proof (a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q) {
 
 
 //// [typedefOnStatements.js]
+"use strict";
 /** @typedef {{a: string}} A */
 ;
 /** @typedef {{ b: string }} B */
diff --git a/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js.diff b/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js.diff
index 2c69789f2a..d6a28715ef 100644
--- a/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/typedefOnStatements.js.diff
@@ -1,14 +1,6 @@
 --- old.typedefOnStatements.js
 +++ new.typedefOnStatements.js
-@@= skipped -81, +81 lines =@@
-
-
- //// [typedefOnStatements.js]
--"use strict";
- /** @typedef {{a: string}} A */
- ;
- /** @typedef {{ b: string }} B */
-@@= skipped -77, +76 lines =@@
+@@= skipped -158, +158 lines =@@
 
 
  //// [typedefOnStatements.d.ts]
diff --git a/testdata/baselines/reference/submodule/conformance/typedefScope1.js b/testdata/baselines/reference/submodule/conformance/typedefScope1.js
index b67955b1d8..b841dd2760 100644
--- a/testdata/baselines/reference/submodule/conformance/typedefScope1.js
+++ b/testdata/baselines/reference/submodule/conformance/typedefScope1.js
@@ -18,6 +18,7 @@ var notOK = 0;
 
 
 //// [typedefScope1.js]
+"use strict";
 function B1() {
     /** @typedef {number} B */
     /** @type {B} */
diff --git a/testdata/baselines/reference/submodule/conformance/typedefScope1.js.diff b/testdata/baselines/reference/submodule/conformance/typedefScope1.js.diff
deleted file mode 100644
index 23ba338955..0000000000
--- a/testdata/baselines/reference/submodule/conformance/typedefScope1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.typedefScope1.js
-+++ new.typedefScope1.js
-@@= skipped -17, +17 lines =@@
-
-
- //// [typedefScope1.js]
--"use strict";
- function B1() {
-     /** @typedef {number} B */
-     /** @type {B} */
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/typeofThis.js b/testdata/baselines/reference/submodule/conformance/typeofThis.js
index 43e18a234a..182aada87f 100644
--- a/testdata/baselines/reference/submodule/conformance/typeofThis.js
+++ b/testdata/baselines/reference/submodule/conformance/typeofThis.js
@@ -146,6 +146,7 @@ class Tests12 {
 }
 
 //// [typeofThis.js]
+"use strict";
 class Test {
     data = {};
     constructor() {
diff --git a/testdata/baselines/reference/submodule/conformance/typeofThis.js.diff b/testdata/baselines/reference/submodule/conformance/typeofThis.js.diff
index 6f592f1897..f91f11867b 100644
--- a/testdata/baselines/reference/submodule/conformance/typeofThis.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/typeofThis.js.diff
@@ -1,10 +1,8 @@
 --- old.typeofThis.js
 +++ new.typeofThis.js
-@@= skipped -145, +145 lines =@@
- }
-
+@@= skipped -147, +147 lines =@@
  //// [typeofThis.js]
--"use strict";
+ "use strict";
  class Test {
 +    data = {};
      constructor() {
@@ -21,7 +19,7 @@
          var copy = { foo: '' };
          var foo = '';
          var self = this;
-@@= skipped -28, +27 lines =@@
+@@= skipped -26, +26 lines =@@
      let x = 1;
  }
  class Test5 {
diff --git a/testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js b/testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js
index 72d4423474..5756901bfe 100644
--- a/testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js
+++ b/testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js
@@ -68,6 +68,7 @@ function run(options: { something?(b?: string): void }) {
 
 
 //// [unionTypeReduction2.js]
+"use strict";
 function f1(x, y) {
     let z = !!true ? x : y; // { f(x?: string): void }
     z.f();
diff --git a/testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js.diff b/testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js.diff
deleted file mode 100644
index 204413fb82..0000000000
--- a/testdata/baselines/reference/submodule/conformance/unionTypeReduction2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionTypeReduction2.js
-+++ new.unionTypeReduction2.js
-@@= skipped -67, +67 lines =@@
-
-
- //// [unionTypeReduction2.js]
--"use strict";
- function f1(x, y) {
-     let z = !!true ? x : y; // { f(x?: string): void }
-     z.f();
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js b/testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js
index 7cad252ef5..e83c5f1497 100644
--- a/testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js
+++ b/testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js
@@ -30,6 +30,7 @@ both[sym] = 'not ok'
 
 
 //// [unionTypeWithIndexSignature.js]
+"use strict";
 u.foo = 'bye';
 u.baz = 'hi';
 v.foo = false;
diff --git a/testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js.diff b/testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js.diff
deleted file mode 100644
index 4d4045c75f..0000000000
--- a/testdata/baselines/reference/submodule/conformance/unionTypeWithIndexSignature.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionTypeWithIndexSignature.js
-+++ new.unionTypeWithIndexSignature.js
-@@= skipped -29, +29 lines =@@
-
-
- //// [unionTypeWithIndexSignature.js]
--"use strict";
- u.foo = 'bye';
- u.baz = 'hi';
- v.foo = false;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js b/testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js
index b56ff77644..5d42f5eb35 100644
--- a/testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js
+++ b/testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js
@@ -66,6 +66,7 @@ const [x, y] = ex;
 
 
 //// [unionsOfTupleTypes1.js]
+"use strict";
 function f1(t1, t2, t3, t4, x) {
     let [d10, d11, d12] = t1; // string, number
     let [d20, d21, d22] = t2; // string | boolean, number | undefined
diff --git a/testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js.diff b/testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js.diff
deleted file mode 100644
index 749b411403..0000000000
--- a/testdata/baselines/reference/submodule/conformance/unionsOfTupleTypes1.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unionsOfTupleTypes1.js
-+++ new.unionsOfTupleTypes1.js
-@@= skipped -65, +65 lines =@@
-
-
- //// [unionsOfTupleTypes1.js]
--"use strict";
- function f1(t1, t2, t3, t4, x) {
-     let [d10, d11, d12] = t1; // string, number
-     let [d20, d21, d22] = t2; // string | boolean, number | undefined
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/unknownControlFlow.js b/testdata/baselines/reference/submodule/conformance/unknownControlFlow.js
index ae1b3605ed..acfda87eb9 100644
--- a/testdata/baselines/reference/submodule/conformance/unknownControlFlow.js
+++ b/testdata/baselines/reference/submodule/conformance/unknownControlFlow.js
@@ -454,6 +454,7 @@ function fx20(value: Either) {
 
 
 //// [unknownControlFlow.js]
+"use strict";
 function f01(u) {
     let x1 = u; // Error
     let x2 = u;
diff --git a/testdata/baselines/reference/submodule/conformance/unknownControlFlow.js.diff b/testdata/baselines/reference/submodule/conformance/unknownControlFlow.js.diff
deleted file mode 100644
index c217eebc14..0000000000
--- a/testdata/baselines/reference/submodule/conformance/unknownControlFlow.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unknownControlFlow.js
-+++ new.unknownControlFlow.js
-@@= skipped -453, +453 lines =@@
-
-
- //// [unknownControlFlow.js]
--"use strict";
- function f01(u) {
-     let x1 = u; // Error
-     let x2 = u;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/unknownType1.js b/testdata/baselines/reference/submodule/conformance/unknownType1.js
index 902cf34cd1..73c9659cff 100644
--- a/testdata/baselines/reference/submodule/conformance/unknownType1.js
+++ b/testdata/baselines/reference/submodule/conformance/unknownType1.js
@@ -186,6 +186,7 @@ function oops<T extends unknown>(arg: T): {} {
 
 
 //// [unknownType1.js]
+"use strict";
 // In an intersection everything absorbs unknown
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
diff --git a/testdata/baselines/reference/submodule/conformance/unknownType1.js.diff b/testdata/baselines/reference/submodule/conformance/unknownType1.js.diff
index d596585009..b8fccb1ab2 100644
--- a/testdata/baselines/reference/submodule/conformance/unknownType1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/unknownType1.js.diff
@@ -1,14 +1,6 @@
 --- old.unknownType1.js
 +++ new.unknownType1.js
-@@= skipped -185, +185 lines =@@
-
-
- //// [unknownType1.js]
--"use strict";
- // In an intersection everything absorbs unknown
- var __rest = (this && this.__rest) || function (s, e) {
-     var t = {};
-@@= skipped -98, +97 lines =@@
+@@= skipped -283, +283 lines =@@
  }
  // Class properties of type unknown don't need definite assignment
  class C1 {
diff --git a/testdata/baselines/reference/submodule/conformance/unknownType2.js b/testdata/baselines/reference/submodule/conformance/unknownType2.js
index a78a10a015..18f88f65ce 100644
--- a/testdata/baselines/reference/submodule/conformance/unknownType2.js
+++ b/testdata/baselines/reference/submodule/conformance/unknownType2.js
@@ -263,6 +263,7 @@ function notNotEquals(u: unknown)  {
 
 
 //// [unknownType2.js]
+"use strict";
 let validate = x => (x === 'yes' || x === 'no') ? x : 'idk'; // No error
 const u = undefined;
 if (u === 5) {
diff --git a/testdata/baselines/reference/submodule/conformance/unknownType2.js.diff b/testdata/baselines/reference/submodule/conformance/unknownType2.js.diff
deleted file mode 100644
index 841bbfb5d6..0000000000
--- a/testdata/baselines/reference/submodule/conformance/unknownType2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.unknownType2.js
-+++ new.unknownType2.js
-@@= skipped -262, +262 lines =@@
-
-
- //// [unknownType2.js]
--"use strict";
- let validate = x => (x === 'yes' || x === 'no') ? x : 'idk'; // No error
- const u = undefined;
- if (u === 5) {
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/variadicTuples1.js b/testdata/baselines/reference/submodule/conformance/variadicTuples1.js
index d3e78713b3..eee1f43b3d 100644
--- a/testdata/baselines/reference/submodule/conformance/variadicTuples1.js
+++ b/testdata/baselines/reference/submodule/conformance/variadicTuples1.js
@@ -426,6 +426,7 @@ type AnyArr = [...any];
 
 
 //// [variadicTuples1.js]
+"use strict";
 // Variadics in tuple types
 // Variadics in array literals
 function tup2(t, u) {
diff --git a/testdata/baselines/reference/submodule/conformance/variadicTuples1.js.diff b/testdata/baselines/reference/submodule/conformance/variadicTuples1.js.diff
index a4acd98f0a..69ca7495d2 100644
--- a/testdata/baselines/reference/submodule/conformance/variadicTuples1.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/variadicTuples1.js.diff
@@ -1,14 +1,6 @@
 --- old.variadicTuples1.js
 +++ new.variadicTuples1.js
-@@= skipped -425, +425 lines =@@
-
-
- //// [variadicTuples1.js]
--"use strict";
- // Variadics in tuple types
- // Variadics in array literals
- function tup2(t, u) {
-@@= skipped -354, +353 lines =@@
+@@= skipped -779, +779 lines =@@
      y?: number;
      z?: boolean;
  }): void;
diff --git a/testdata/baselines/reference/submodule/conformance/variadicTuples2.js b/testdata/baselines/reference/submodule/conformance/variadicTuples2.js
index b3ace75b0b..3290d63850 100644
--- a/testdata/baselines/reference/submodule/conformance/variadicTuples2.js
+++ b/testdata/baselines/reference/submodule/conformance/variadicTuples2.js
@@ -143,6 +143,7 @@ const e1 = foo('blah1', 'blah2', 1, 2, 3);  // Error
 
 
 //// [variadicTuples2.js]
+"use strict";
 // Declarations
 tt1 = [5];
 tt1 = ['abc', 5];
diff --git a/testdata/baselines/reference/submodule/conformance/variadicTuples2.js.diff b/testdata/baselines/reference/submodule/conformance/variadicTuples2.js.diff
deleted file mode 100644
index 4f2124b983..0000000000
--- a/testdata/baselines/reference/submodule/conformance/variadicTuples2.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.variadicTuples2.js
-+++ new.variadicTuples2.js
-@@= skipped -142, +142 lines =@@
-
-
- //// [variadicTuples2.js]
--"use strict";
- // Declarations
- tt1 = [5];
- tt1 = ['abc', 5];
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/variance.js b/testdata/baselines/reference/submodule/conformance/variance.js
index c44221eb43..b20e006b0a 100644
--- a/testdata/baselines/reference/submodule/conformance/variance.js
+++ b/testdata/baselines/reference/submodule/conformance/variance.js
@@ -29,6 +29,7 @@ class Bar<T extends string> {
 
 
 //// [variance.js]
+"use strict";
 // Test cases for parameter variances affected by conditional types.
 const foo = { prop: true };
 const x = foo;
diff --git a/testdata/baselines/reference/submodule/conformance/variance.js.diff b/testdata/baselines/reference/submodule/conformance/variance.js.diff
index 6e07b342e6..636b62d7f6 100644
--- a/testdata/baselines/reference/submodule/conformance/variance.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/variance.js.diff
@@ -1,14 +1,6 @@
 --- old.variance.js
 +++ new.variance.js
-@@= skipped -28, +28 lines =@@
-
-
- //// [variance.js]
--"use strict";
- // Test cases for parameter variances affected by conditional types.
- const foo = { prop: true };
- const x = foo;
-@@= skipped -8, +7 lines =@@
+@@= skipped -36, +36 lines =@@
  const z = x;
  // Repro from #30118
  class Bar {
diff --git a/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js b/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js
index 596eebfdf7..14831a2d07 100644
--- a/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js
+++ b/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js
@@ -178,6 +178,7 @@ let OuterC = class C<out T> {
 
 
 //// [varianceAnnotations.js]
+"use strict";
 super_covariant = sub_covariant;
 sub_covariant = super_covariant; // Error
 super_contravariant = sub_contravariant; // Error
diff --git a/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js.diff b/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js.diff
index ba4a815f40..a750dcbe83 100644
--- a/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js.diff
+++ b/testdata/baselines/reference/submodule/conformance/varianceAnnotations.js.diff
@@ -1,14 +1,6 @@
 --- old.varianceAnnotations.js
 +++ new.varianceAnnotations.js
-@@= skipped -177, +177 lines =@@
-
-
- //// [varianceAnnotations.js]
--"use strict";
- super_covariant = sub_covariant;
- sub_covariant = super_covariant; // Error
- super_contravariant = sub_contravariant; // Error
-@@= skipped -8, +7 lines =@@
+@@= skipped -185, +185 lines =@@
  super_invariant = sub_invariant; // Error
  sub_invariant = super_invariant; // Error
  class C {
diff --git a/testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js b/testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js
index 4c33191ad3..11c0eb0ffd 100644
--- a/testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js
+++ b/testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js
@@ -5,6 +5,7 @@ type T1<in in> = T1 // Error: circularly references
 type T2<out out> = T2 // Error: circularly references 
 
 //// [varianceAnnotationsWithCircularlyReferencesError.js]
+"use strict";
 
 
 //// [varianceAnnotationsWithCircularlyReferencesError.d.ts]
diff --git a/testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js.diff b/testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js.diff
deleted file mode 100644
index 2f276bc70c..0000000000
--- a/testdata/baselines/reference/submodule/conformance/varianceAnnotationsWithCircularlyReferencesError.js.diff
+++ /dev/null
@@ -1,10 +0,0 @@
---- old.varianceAnnotationsWithCircularlyReferencesError.js
-+++ new.varianceAnnotationsWithCircularlyReferencesError.js
-@@= skipped -4, +4 lines =@@
- type T2<out out> = T2 // Error: circularly references 
-
- //// [varianceAnnotationsWithCircularlyReferencesError.js]
--"use strict";
-
-
- //// [varianceAnnotationsWithCircularlyReferencesError.d.ts]
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js b/testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js
index 80418f37ca..2b2abb4923 100644
--- a/testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js
+++ b/testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js
@@ -13,5 +13,6 @@ gg = o.method;
 
 
 //// [voidParamAssignmentCompatibility.js]
+"use strict";
 let gg = g;
 gg = o.method;
diff --git a/testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js.diff b/testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js.diff
deleted file mode 100644
index b3ce70185e..0000000000
--- a/testdata/baselines/reference/submodule/conformance/voidParamAssignmentCompatibility.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.voidParamAssignmentCompatibility.js
-+++ new.voidParamAssignmentCompatibility.js
-@@= skipped -12, +12 lines =@@
-
-
- //// [voidParamAssignmentCompatibility.js]
--"use strict";
- let gg = g;
- gg = o.method;
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js b/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js
index 46803051a1..09fafb0dfc 100644
--- a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js
+++ b/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js
@@ -31,6 +31,5 @@ class C {
 var c = new C({ length: 2 });
 var r = c.foo({ length: 3, charAt: (x) => {
         '';
-        '';
     } });
 var r2 = r('');
diff --git a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js.diff b/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js.diff
deleted file mode 100644
index 45be920b88..0000000000
--- a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints3.js.diff
+++ /dev/null
@@ -1,9 +0,0 @@
---- old.wrappedAndRecursiveConstraints3.js
-+++ new.wrappedAndRecursiveConstraints3.js
-@@= skipped -30, +30 lines =@@
- var c = new C({ length: 2 });
- var r = c.foo({ length: 3, charAt: (x) => {
-         '';
-+        '';
-     } });
- var r2 = r('');
\ No newline at end of file
diff --git a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js b/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js
index 16b9d96bfe..cbd1e239b9 100644
--- a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js
+++ b/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js
@@ -29,5 +29,4 @@ var c = new C({ length: 2 });
 var r = c.foo('');
 var r2 = r({ length: 3, charAt: (x) => {
         '';
-        '';
     } }); // error
diff --git a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js.diff b/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js.diff
deleted file mode 100644
index aca9c24382..0000000000
--- a/testdata/baselines/reference/submodule/conformance/wrappedAndRecursiveConstraints4.js.diff
+++ /dev/null
@@ -1,8 +0,0 @@
---- old.wrappedAndRecursiveConstraints4.js
-+++ new.wrappedAndRecursiveConstraints4.js
-@@= skipped -28, +28 lines =@@
- var r = c.foo('');
- var r2 = r({ length: 3, charAt: (x) => {
-         '';
-+        '';
-     } }); // error
\ No newline at end of file
diff --git a/testdata/baselines/reference/tsbuild/moduleResolution/impliedNodeFormat-differs-between-projects-for-shared-file.js b/testdata/baselines/reference/tsbuild/moduleResolution/impliedNodeFormat-differs-between-projects-for-shared-file.js
index 4c0233d595..9e027a692d 100644
--- a/testdata/baselines/reference/tsbuild/moduleResolution/impliedNodeFormat-differs-between-projects-for-shared-file.js
+++ b/testdata/baselines/reference/tsbuild/moduleResolution/impliedNodeFormat-differs-between-projects-for-shared-file.js
@@ -147,6 +147,7 @@ interface Symbol {
 }
 declare const console: { log(msg: any): void; };
 //// [/home/src/workspaces/project/a/src/index.js] *new* 
+"use strict";
 
 //// [/home/src/workspaces/project/a/tsconfig.tsbuildinfo] *new* 
 {"version":"FakeTSVersion","root":["./src/index.ts"]}
diff --git a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-correctly-when-project-with-extended-config-is-removed.js b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-correctly-when-project-with-extended-config-is-removed.js
index 26d41d3ab1..9e5890db5d 100644
--- a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-correctly-when-project-with-extended-config-is-removed.js
+++ b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-correctly-when-project-with-extended-config-is-removed.js
@@ -95,18 +95,21 @@ declare const console: { log(msg: any): void; };
 declare let x: number;
 
 //// [/user/username/projects/project/commonFile1.js] *new* 
+"use strict";
 let x = 1;
 
 //// [/user/username/projects/project/commonFile2.d.ts] *new* 
 declare let y: number;
 
 //// [/user/username/projects/project/commonFile2.js] *new* 
+"use strict";
 let y = 1;
 
 //// [/user/username/projects/project/other.d.ts] *new* 
 declare let z: number;
 
 //// [/user/username/projects/project/other.js] *new* 
+"use strict";
 let z = 0;
 
 //// [/user/username/projects/project/project1.tsconfig.tsbuildinfo] *new* 
diff --git a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
index fca155d58a..2f2e5d3ece 100644
--- a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
+++ b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
@@ -314,9 +314,18 @@ Output::
 
 [HH:MM:SS AM] Found 0 errors. Watching for file changes.
 
-//// [/user/username/projects/project/commonFile1.js] *rewrite with same content*
-//// [/user/username/projects/project/commonFile2.js] *rewrite with same content*
-//// [/user/username/projects/project/other.js] *rewrite with same content*
+//// [/user/username/projects/project/commonFile1.js] *modified* 
+"use strict";
+let x = 1;
+
+//// [/user/username/projects/project/commonFile2.js] *modified* 
+"use strict";
+let y = 1;
+
+//// [/user/username/projects/project/other.js] *modified* 
+"use strict";
+let z = 0;
+
 //// [/user/username/projects/project/project1.tsconfig.tsbuildinfo] *modified* 
 {"version":"FakeTSVersion","root":[[2,3]],"fileNames":["lib.d.ts","./commonFile1.ts","./commonFile2.ts"],"fileInfos":[{"version":"8859c12c614ce56ba9a18e58384a198f-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ninterface SymbolConstructor {\n    (desc?: string | number): symbol;\n    for(name: string): symbol;\n    readonly toStringTag: symbol;\n}\ndeclare var Symbol: SymbolConstructor;\ninterface Symbol {\n    readonly [Symbol.toStringTag]: string;\n}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true,"impliedNodeFormat":1},{"version":"4e1a8b13d3ccc04f0aaac579ade4a50b-let x = 1","signature":"0e529fdc590223d6038e844fdfd212cd-declare let x: number;\n","affectsGlobalScope":true,"impliedNodeFormat":1},{"version":"06ce815ba25b02847f0b8550f82f5a25-let y = 1","signature":"114cede92fdd1b7222858083021aeba2-declare let y: number;\n","affectsGlobalScope":true,"impliedNodeFormat":1}],"options":{"composite":true,"strict":true},"latestChangedDtsFile":"./commonFile2.d.ts"}
 //// [/user/username/projects/project/project1.tsconfig.tsbuildinfo.readable.baseline.txt] *modified* 
@@ -474,7 +483,9 @@ Output::
 
 [HH:MM:SS AM] Found 0 errors. Watching for file changes.
 
-//// [/user/username/projects/project/other.js] *rewrite with same content*
+//// [/user/username/projects/project/other.js] *modified* 
+let z = 0;
+
 //// [/user/username/projects/project/project2.tsconfig.tsbuildinfo] *modified* 
 {"version":"FakeTSVersion","root":[2],"fileNames":["lib.d.ts","./other.ts"],"fileInfos":[{"version":"8859c12c614ce56ba9a18e58384a198f-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ninterface SymbolConstructor {\n    (desc?: string | number): symbol;\n    for(name: string): symbol;\n    readonly toStringTag: symbol;\n}\ndeclare var Symbol: SymbolConstructor;\ninterface Symbol {\n    readonly [Symbol.toStringTag]: string;\n}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true,"impliedNodeFormat":1},{"version":"7148e8559d706b66aaba2a2423755c63-let z = 0;","signature":"879426698e1db06899fd57775c19b230-declare let z: number;\n","affectsGlobalScope":true,"impliedNodeFormat":1}],"options":{"composite":true,"strict":false},"latestChangedDtsFile":"./other.d.ts"}
 //// [/user/username/projects/project/project2.tsconfig.tsbuildinfo.readable.baseline.txt] *modified* 
@@ -557,8 +568,14 @@ Output::
 
 //// [/user/username/projects/project/commonFile1.js] *rewrite with same content*
 //// [/user/username/projects/project/commonFile2.js] *rewrite with same content*
-//// [/user/username/projects/project/other.js] *rewrite with same content*
-//// [/user/username/projects/project/other2.js] *rewrite with same content*
+//// [/user/username/projects/project/other.js] *modified* 
+"use strict";
+let z = 0;
+
+//// [/user/username/projects/project/other2.js] *modified* 
+"use strict";
+let k = 0;
+
 //// [/user/username/projects/project/project2.tsconfig.tsbuildinfo] *modified* 
 {"version":"FakeTSVersion","root":["./commonFile1.ts","./commonFile2.ts","./other.ts","./other2.ts"]}
 //// [/user/username/projects/project/project2.tsconfig.tsbuildinfo.readable.baseline.txt] *modified* 
@@ -603,6 +620,14 @@ SemanticDiagnostics::
 Signatures::
 
 
+Diff:: !!! Unexpected diff, please review and either fix or write explanation as expectedDiff !!!
+--- nonIncremental /user/username/projects/project/other2.js
++++ incremental /user/username/projects/project/other2.js
+@@ -1,1 +1,2 @@
++"use strict";
+ let k = 0;
+
+
 Edit [3]:: update aplha config
 //// [/user/username/projects/project/alpha.tsconfig.json] *modified* 
 {}
@@ -626,10 +651,18 @@ Output::
 
 [HH:MM:SS AM] Found 0 errors. Watching for file changes.
 
-//// [/user/username/projects/project/commonFile1.js] *rewrite with same content*
-//// [/user/username/projects/project/commonFile2.js] *rewrite with same content*
-//// [/user/username/projects/project/other.js] *rewrite with same content*
-//// [/user/username/projects/project/other2.js] *rewrite with same content*
+//// [/user/username/projects/project/commonFile1.js] *modified* 
+let x = 1;
+
+//// [/user/username/projects/project/commonFile2.js] *modified* 
+let y = 1;
+
+//// [/user/username/projects/project/other.js] *modified* 
+let z = 0;
+
+//// [/user/username/projects/project/other2.js] *modified* 
+let k = 0;
+
 //// [/user/username/projects/project/project1.tsconfig.tsbuildinfo] *modified* 
 {"version":"FakeTSVersion","root":[[2,3]],"fileNames":["lib.d.ts","./commonFile1.ts","./commonFile2.ts"],"fileInfos":[{"version":"8859c12c614ce56ba9a18e58384a198f-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ninterface SymbolConstructor {\n    (desc?: string | number): symbol;\n    for(name: string): symbol;\n    readonly toStringTag: symbol;\n}\ndeclare var Symbol: SymbolConstructor;\ninterface Symbol {\n    readonly [Symbol.toStringTag]: string;\n}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true,"impliedNodeFormat":1},{"version":"4e1a8b13d3ccc04f0aaac579ade4a50b-let x = 1","signature":"0e529fdc590223d6038e844fdfd212cd-declare let x: number;\n","affectsGlobalScope":true,"impliedNodeFormat":1},{"version":"06ce815ba25b02847f0b8550f82f5a25-let y = 1","signature":"114cede92fdd1b7222858083021aeba2-declare let y: number;\n","affectsGlobalScope":true,"impliedNodeFormat":1}],"options":{"composite":true},"latestChangedDtsFile":"./commonFile2.d.ts"}
 //// [/user/username/projects/project/project1.tsconfig.tsbuildinfo.readable.baseline.txt] *modified* 
diff --git a/testdata/baselines/reference/tsc/incremental/serializing-error-chain.js b/testdata/baselines/reference/tsc/incremental/serializing-error-chain.js
index 3a1c2607fc..78c6bf193a 100644
--- a/testdata/baselines/reference/tsc/incremental/serializing-error-chain.js
+++ b/testdata/baselines/reference/tsc/incremental/serializing-error-chain.js
@@ -68,6 +68,7 @@ interface Symbol {
 }
 declare const console: { log(msg: any): void; };
 //// [/home/src/workspaces/project/index.js] *new* 
+"use strict";
 (React.createElement(Component, null,
     React.createElement("div", null),
     React.createElement("div", null)));

From 3aba34a6596dba89cdc1b8d216e48c34b328cff8 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Thu, 6 Nov 2025 13:54:16 -0800
Subject: [PATCH 3/4] Baseline fix

---
 .../programUpdates/works-with-extended-source-files.js    | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
index 2f2e5d3ece..08fe52e1b5 100644
--- a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
+++ b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
@@ -620,14 +620,6 @@ SemanticDiagnostics::
 Signatures::
 
 
-Diff:: !!! Unexpected diff, please review and either fix or write explanation as expectedDiff !!!
---- nonIncremental /user/username/projects/project/other2.js
-+++ incremental /user/username/projects/project/other2.js
-@@ -1,1 +1,2 @@
-+"use strict";
- let k = 0;
-
-
 Edit [3]:: update aplha config
 //// [/user/username/projects/project/alpha.tsconfig.json] *modified* 
 {}

From 42131c9cd169de629277a5a8a96f5a5261428c9e Mon Sep 17 00:00:00 2001
From: Jake Bailey <5341706+jakebailey@users.noreply.github.com>
Date: Fri, 7 Nov 2025 12:29:06 -0800
Subject: [PATCH 4/4] Ensure program test includes missing files list to
 prevent file write race between projects

---
 internal/execute/tsctests/tscbuild_test.go    |  1 +
 .../works-with-extended-source-files.js       | 40 ++-----------------
 2 files changed, 5 insertions(+), 36 deletions(-)

diff --git a/internal/execute/tsctests/tscbuild_test.go b/internal/execute/tsctests/tscbuild_test.go
index b1e709cacf..8454b6e100 100644
--- a/internal/execute/tsctests/tscbuild_test.go
+++ b/internal/execute/tsctests/tscbuild_test.go
@@ -1949,6 +1949,7 @@ func TestBuildProgramUpdates(t *testing.T) {
 						sys.writeFileNoError("/user/username/projects/project/project2.tsconfig.json", stringtestutil.Dedent(`
 						{
                             "extends": "./alpha.tsconfig.json",
+                            "files": ["other.ts"]
                         }`), false)
 					},
 				},
diff --git a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
index 08fe52e1b5..15a3c7a54d 100644
--- a/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
+++ b/testdata/baselines/reference/tsbuildWatch/programUpdates/works-with-extended-source-files.js
@@ -549,6 +549,7 @@ Edit [2]:: project 2 extends alpha
 //// [/user/username/projects/project/project2.tsconfig.json] *modified* 
 {
     "extends": "./alpha.tsconfig.json",
+    "files": ["other.ts"]
 }
 
 
@@ -560,63 +561,36 @@ Output::
     * project2.tsconfig.json
     * project3.tsconfig.json
 
-[HH:MM:SS AM] Project 'project2.tsconfig.json' is out of date because output 'other2.js' is older than input 'project2.tsconfig.json'
+[HH:MM:SS AM] Project 'project2.tsconfig.json' is out of date because output 'project2.tsconfig.tsbuildinfo' is older than input 'project2.tsconfig.json'
 
 [HH:MM:SS AM] Building project 'project2.tsconfig.json'...
 
 [HH:MM:SS AM] Found 0 errors. Watching for file changes.
 
-//// [/user/username/projects/project/commonFile1.js] *rewrite with same content*
-//// [/user/username/projects/project/commonFile2.js] *rewrite with same content*
 //// [/user/username/projects/project/other.js] *modified* 
 "use strict";
 let z = 0;
 
-//// [/user/username/projects/project/other2.js] *modified* 
-"use strict";
-let k = 0;
-
 //// [/user/username/projects/project/project2.tsconfig.tsbuildinfo] *modified* 
-{"version":"FakeTSVersion","root":["./commonFile1.ts","./commonFile2.ts","./other.ts","./other2.ts"]}
+{"version":"FakeTSVersion","root":["./other.ts"]}
 //// [/user/username/projects/project/project2.tsconfig.tsbuildinfo.readable.baseline.txt] *modified* 
 {
   "version": "FakeTSVersion",
   "root": [
-    {
-      "files": [
-        "./commonFile1.ts"
-      ],
-      "original": "./commonFile1.ts"
-    },
-    {
-      "files": [
-        "./commonFile2.ts"
-      ],
-      "original": "./commonFile2.ts"
-    },
     {
       "files": [
         "./other.ts"
       ],
       "original": "./other.ts"
-    },
-    {
-      "files": [
-        "./other2.ts"
-      ],
-      "original": "./other2.ts"
     }
   ],
-  "size": 101
+  "size": 49
 }
 
 project2.tsconfig.json::
 SemanticDiagnostics::
 *refresh*    /home/src/tslibs/TS/Lib/lib.d.ts
-*refresh*    /user/username/projects/project/commonFile1.ts
-*refresh*    /user/username/projects/project/commonFile2.ts
 *refresh*    /user/username/projects/project/other.ts
-*refresh*    /user/username/projects/project/other2.ts
 Signatures::
 
 
@@ -652,9 +626,6 @@ let y = 1;
 //// [/user/username/projects/project/other.js] *modified* 
 let z = 0;
 
-//// [/user/username/projects/project/other2.js] *modified* 
-let k = 0;
-
 //// [/user/username/projects/project/project1.tsconfig.tsbuildinfo] *modified* 
 {"version":"FakeTSVersion","root":[[2,3]],"fileNames":["lib.d.ts","./commonFile1.ts","./commonFile2.ts"],"fileInfos":[{"version":"8859c12c614ce56ba9a18e58384a198f-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ninterface SymbolConstructor {\n    (desc?: string | number): symbol;\n    for(name: string): symbol;\n    readonly toStringTag: symbol;\n}\ndeclare var Symbol: SymbolConstructor;\ninterface Symbol {\n    readonly [Symbol.toStringTag]: string;\n}\ndeclare const console: { log(msg: any): void; };","affectsGlobalScope":true,"impliedNodeFormat":1},{"version":"4e1a8b13d3ccc04f0aaac579ade4a50b-let x = 1","signature":"0e529fdc590223d6038e844fdfd212cd-declare let x: number;\n","affectsGlobalScope":true,"impliedNodeFormat":1},{"version":"06ce815ba25b02847f0b8550f82f5a25-let y = 1","signature":"114cede92fdd1b7222858083021aeba2-declare let y: number;\n","affectsGlobalScope":true,"impliedNodeFormat":1}],"options":{"composite":true},"latestChangedDtsFile":"./commonFile2.d.ts"}
 //// [/user/username/projects/project/project1.tsconfig.tsbuildinfo.readable.baseline.txt] *modified* 
@@ -736,10 +707,7 @@ Signatures::
 project2.tsconfig.json::
 SemanticDiagnostics::
 *refresh*    /home/src/tslibs/TS/Lib/lib.d.ts
-*refresh*    /user/username/projects/project/commonFile1.ts
-*refresh*    /user/username/projects/project/commonFile2.ts
 *refresh*    /user/username/projects/project/other.ts
-*refresh*    /user/username/projects/project/other2.ts
 Signatures::