Fix some broken links

TSPL.docc/LanguageGuide/Concurrency.md

@@ -917,10 +917,10 @@ You have complete flexibility to manage unstructured tasks
 in whatever way your program needs,
 but you're also completely responsible for their correctness.
 To create an unstructured task that runs on the current actor,
-call the [`Task.init(priority:operation:)`](https://developer.apple.com/documentation/swift/task/3856790-init) initializer.
+call the [`Task.init(priority:operation:)`][] initializer.
 To create an unstructured task that's not part of the current actor,
 known more specifically as a *detached task*,
-call the [`Task.detached(priority:operation:)`](https://developer.apple.com/documentation/swift/task/3856786-detached) class method.
+call the [`Task.detached(priority:operation:)`][] class method.
 Both of these operations return a task that you can interact with ---
 for example, to wait for its result or to cancel it.
 
@@ -935,6 +935,9 @@ let result = await handle.value
 For more information about managing detached tasks,
 see [`Task`](https://developer.apple.com/documentation/swift/task).
 
+[`Task.init(priority:operation:)`]: https://developer.apple.com/documentation/swift/task/init(priority:operation:)-7f0zv
+[`Task.detached(priority:operation:)`]: https://developer.apple.com/documentation/swift/task/detached(priority:operation:)-d24l
+
 <!--
   TODO Add some conceptual guidance about
   when to make a method do its work in a detached task

TSPL.docc/LanguageGuide/Macros.md

@@ -520,11 +520,11 @@ automatically includes a dependency on SwiftSyntax.
 If you're adding macros to an existing project,
 add a dependency on SwiftSyntax in your `Package.swift` file:
 
-[SwiftSyntax]: http://github.com/apple/swift-syntax/
+[SwiftSyntax]: https://github.com/swiftlang/swift-syntax
 
 ```swift
 dependencies: [
-    .package(url: "https://github.com/apple/swift-syntax", from: "509.0.0")
+    .package(url: "https://github.com/swiftlang/swift-syntax", from: "509.0.0")
 ],
 ```
 
@@ -633,7 +633,7 @@ so you can use this approach when implementing any kind of macro.
 <!--
 The return-a-string APIs come from here
 
-https://github.com/apple/swift-syntax/blob/main/Sources/SwiftSyntaxBuilder/Syntax%2BStringInterpolation.swift
+https://github.com/swiftlang/swift-syntax/blob/main/Sources/SwiftSyntaxBuilder/Syntax%2BStringInterpolation.swift
 -->
 
 

TSPL.docc/ReferenceManual/Attributes.md

@@ -752,7 +752,7 @@ Or are those supported today?
 I see #error and #warning as @freestanding(declaration)
 in the stdlib already:
 
-https://github.com/apple/swift/blob/main/stdlib/public/core/Macros.swift#L102
+https://github.com/swiftlang/swift/blob/main/stdlib/public/core/Macros.swift#L102
 -->
 
 ### frozen

TSPL.docc/ReferenceManual/Declarations.md

@@ -3582,7 +3582,7 @@ Call the `externalMacro(module:type:)` macro from the Swift standard library,
 passing in the name of a type that contains the macro's implementation,
 and the name of the module that contains that type.
 
-[SwiftSyntax]: http://github.com/apple/swift-syntax/
+[SwiftSyntax]: https://github.com/swiftlang/swift-syntax
 
 Macros can be overloaded,
 following the same model used by functions.

TSPL.docc/ReferenceManual/LexicalStructure.md

@@ -107,8 +107,8 @@ The backticks aren't considered part of the identifier;
 The paragraph above produces a link-resolution warning
 because of a known issue with ` in code voice.
 
-https://github.com/apple/swift-book/issues/71
-https://github.com/apple/swift-markdown/issues/93
+https://github.com/swiftlang/swift-book/issues/71
+https://github.com/swiftlang/swift-markdown/issues/93
 -->
 
 Inside a closure with no explicit parameter names,
@@ -133,8 +133,8 @@ The formal grammar below for 'identifier'
 produces a link-resolution warning
 because of a known issue with ` in code voice.
 
-https://github.com/apple/swift-book/issues/71
-https://github.com/apple/swift-markdown/issues/93
+https://github.com/swiftlang/swift-book/issues/71
+https://github.com/swiftlang/swift-markdown/issues/93
 -->
 
 > Grammar of an identifier:
@@ -971,7 +971,7 @@ and `/\d/` matches a single digit.
   of the supported syntax here.
   (Unified dialect/superset of POSIX + PCRE 2 + Oniguruma + .NET)
 
-  https://github.com/apple/swift-experimental-string-processing/blob/main/Sources/_StringProcessing/Regex/Core.swift
+  https://github.com/swiftlang/swift-experimental-string-processing/blob/main/Sources/_StringProcessing/Regex/Core.swift
 
   Regex literals and the DSL take different approaches to captures.
   The literals give you more type safety.

TSPL.docc/ReferenceManual/Statements.md

@@ -1316,8 +1316,8 @@ the `#warning` and `#error` statements emit a diagnostic during compilation.
 This behavior is now provided by
 the [`warning(_:)`][] and [`error(_:)`][] macros in the Swift standard library.
 
-[`warning(_:)`]: http://developer.apple.com/documentation/swift/documentation/swift/warning(_:)
-[`error(_:)`]: http://developer.apple.com/documentation/swift/documentation/swift/error(_:)
+[`warning(_:)`]: https://developer.apple.com/documentation/swift/warning(_:)
+[`error(_:)`]: https://developer.apple.com/documentation/swift/error(_:)
 
 ## Availability Condition
 

TSPL.docc/ReferenceManual/Types.md

@@ -975,7 +975,7 @@ because those types are already boxed protocol types.
 
 <!--
 Contrast P.Type with (any P.Type) and (any P).Type
-https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md#metatypes
+https://github.com/swiftlang/swift-evolution/blob/main/proposals/0335-existential-any.md#metatypes
 -->
 
 > Grammar of a boxed protocol type:

TSPL.docc/header-staging.html

@@ -17,7 +17,7 @@ <h3>Important</h3>
         </p>
         <p>
             For the current shipping book, see <a href="https://docs.swift.org/swift-book/documentation/the-swift-programming-language/">Swift.org</a>.
-            To contribute to this documentation, see the <a href="https://github.com/apple/swift-book">swift-book project</a> on GitHub.
+            To contribute to this documentation, see the <a href="https://github.com/swiftlang/swift-book">swift-book project</a> on GitHub.
         </p>
         </aside>
     </div>

bin/preflight

@@ -45,7 +45,7 @@ xpath -q -n -e '//link/@destination' |
 sort -u | cut -f2 -d= | grep -v '^"doc:' | sed 's/^"//; s/"$//' |
 while read url
 do
-    if curl --silent --output /dev/null --fail --head $url
+    if curl --silent --output /dev/null --location --fail --head $url
     then
         echo "     $url"
     else