test(core): clean up unnecessary nesting in old tests (angular#52239)

A lot of our tests are wrapped in `{}` which serves no purpose, aside from increasing the nesting level and, in some cases, causing confusion. The braces appear to be a leftover from a time when all tests were wrapped in a `function main() {}`. The function declaration was removed in angular#21053, but the braces remained, presumably because it was easier to search&replace for `function main()`, but not to remove the braces at the same time.

PR Close angular#52239

Author: crisbeto

packages/animations/browser/test/dsl/animation_ast_builder_spec.ts

@@ -10,54 +10,53 @@ import {AnimationMetadata, AnimationMetadataType} from '@angular/animations';
 import {buildAnimationAst} from '../../src/dsl/animation_ast_builder';
 import {MockAnimationDriver} from '../../testing';
 
-{
-  describe('buildAnimationAst', () => {
-    it('should build the AST without any errors and warnings', () => {
-      const driver = new MockAnimationDriver();
-      const errors: Error[] = [];
-      const warnings: string[] = [];
-      const animationAst = buildAnimationAst(
-          driver, <AnimationMetadata>{
-            animation: [{
-              styles: {
-                offset: null,
-                styles: {backgroundColor: '#000'},
-                type: AnimationMetadataType.Style
-              },
-              timings: {delay: 0, duration: 1000, easing: 'ease-in-out'},
-              type: AnimationMetadataType.Animate
-            }],
-            options: null,
-            selector: 'body',
-            type: AnimationMetadataType.Query
-          },
-          errors, warnings);
 
-      expect(errors).toEqual([]);
-      expect(warnings).toEqual([]);
-      expect(animationAst).toEqual(<ReturnType<typeof buildAnimationAst>>{
-        type: 11,
-        selector: 'body',
-        limit: 0,
-        optional: false,
-        includeSelf: false,
-        animation: {
-          type: 4,
-          timings: {delay: 0, duration: 1000, easing: 'ease-in-out'},
-          style: {
-            type: 6,
-            styles: [new Map([['backgroundColor', '#000']])],
-            easing: null,
-            offset: null,
-            containsDynamicStyles: false,
-            options: null,
-            isEmptyStep: false
-          },
-          options: null
+describe('buildAnimationAst', () => {
+  it('should build the AST without any errors and warnings', () => {
+    const driver = new MockAnimationDriver();
+    const errors: Error[] = [];
+    const warnings: string[] = [];
+    const animationAst = buildAnimationAst(
+        driver, <AnimationMetadata>{
+          animation: [{
+            styles: {
+              offset: null,
+              styles: {backgroundColor: '#000'},
+              type: AnimationMetadataType.Style
+            },
+            timings: {delay: 0, duration: 1000, easing: 'ease-in-out'},
+            type: AnimationMetadataType.Animate
+          }],
+          options: null,
+          selector: 'body',
+          type: AnimationMetadataType.Query
         },
-        originalSelector: 'body',
-        options: {}
-      });
+        errors, warnings);
+
+    expect(errors).toEqual([]);
+    expect(warnings).toEqual([]);
+    expect(animationAst).toEqual(<ReturnType<typeof buildAnimationAst>>{
+      type: 11,
+      selector: 'body',
+      limit: 0,
+      optional: false,
+      includeSelf: false,
+      animation: {
+        type: 4,
+        timings: {delay: 0, duration: 1000, easing: 'ease-in-out'},
+        style: {
+          type: 6,
+          styles: [new Map([['backgroundColor', '#000']])],
+          easing: null,
+          offset: null,
+          containsDynamicStyles: false,
+          options: null,
+          isEmptyStep: false
+        },
+        options: null
+      },
+      originalSelector: 'body',
+      options: {}
     });
   });
-}
+});