[clang] [AST] Iterate redecls starting from the canonical one in getRawCommentsForAnyRedecl() (PR #108475)

[Nathan Ridge via cfe-commits]

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@@ -444,7 +444,7 @@ const RawComment *ASTContext::getRawCommentForAnyRedecl(
     return CommentlessRedeclChains.lookup(CanonicalD);
   }();
 
-  for (const auto Redecl : D->redecls()) {
+  for (const auto Redecl : CanonicalD->redecls()) {
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HighCommander4 wrote:

Thank you for the suggestion! It indeed feels safer to tweak `getRawCommentsForAnyRedecl()` like this than to muck around with the modeling of template specializations :laughing: 

https://github.com/llvm/llvm-project/pull/108475