[clang] [clang][Sema] Fix ObjC file-scope literal diagnostic under -fobjc-arc (PR #209688)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang/lib/Sema/SemaDecl.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 5dbc5b653..885083c8b 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -12919,7 +12919,7 @@ bool Sema::CheckForConstantInitializer(Expr *Init, unsigned DiagID) {
 
   // Under ARC, the initializer is wrapped in `ExprWithCleanups` +
   // `ImplicitCastExpr <ARCReclaimReturnedObject>`. Unwrap both
-  // here so the ObjC-specific path fires under ARC too. 
+  // here so the ObjC-specific path fires under ARC too.
   Init = Init->IgnoreImpCasts();
   if (auto *EWC = dyn_cast<ExprWithCleanups>(Init))
     Init = EWC->getSubExpr()->IgnoreImpCasts();

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https://github.com/llvm/llvm-project/pull/209688