[clang] [Attributes] Support Attributes being declared as supporting an experimental late parsing mode "extension" (PR #88596)

[Yeoul Na via cfe-commits]

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@@ -1371,14 +1371,23 @@ class Parser : public CodeCompletionHandler {
   };
 
   // A list of late-parsed attributes.  Used by ParseGNUAttributes.
-  class LateParsedAttrList: public SmallVector<LateParsedAttribute *, 2> {
+  class LateParsedAttrList : public SmallVector<LateParsedAttribute *, 2> {
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rapidsna wrote:

Nit: seemingly unnecessary whitespace only change

https://github.com/llvm/llvm-project/pull/88596