Enable the verify documentation GitHub Action check

And remove the corresponding subcommand from `swift-syntax-dev-utils`.

Fixes #2987

Author: ahoppen

.github/workflows/pull_request.yml

@@ -16,10 +16,9 @@ jobs:
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main
     with:
       license_header_check_project_name: "Swift.org"
+      docs_check_additional_arguments: "--disable-parameters-and-returns-validation"
       # https://github.com/swiftlang/swift-syntax/issues/2986
       api_breakage_check_enabled: false
-      # https://github.com/swiftlang/swift-syntax/issues/2987
-      docs_check_enabled: false
       # https://github.com/swiftlang/swift-syntax/issues/2988
       format_check_enabled: false
       # https://github.com/swiftlang/swift-syntax/issues/2989

Sources/SwiftParser/StringLiteralRepresentedLiteralValue.swift

@@ -83,8 +83,8 @@ extension StringSegmentSyntax {
     precondition(!hasError, "appendUnescapedLiteralValue relies on properly parsed literals")
 
     let rawText = content.rawText
-    if !rawText.contains("\\") {
-      // Fast path. No escape sequence.
+    if !rawText.contains(where: { $0 == "\\" || $0 == "\r" }) {
+      // Fast path. No escape sequence that need to be interpreted or \r\n that need to be normalized to \n.
       output.append(String(syntaxText: rawText))
       return
     }

SwiftSyntaxDevUtils/Sources/swift-syntax-dev-utils/SwiftSyntaxDevUtils.swift

@@ -30,7 +30,6 @@ struct SwiftSyntaxDevUtils: ParsableCommand {
       GenerateSourceCode.self,
       LocalPrPrecheck.self,
       Test.self,
-      VerifyDocumentation.self,
       VerifySourceCode.self,
     ]
   )