[clang] [Clang] omit parentheses in fold expressions with a single expansion (PR #110761)

[via cfe-commits]

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@@ -15661,12 +15661,16 @@ TreeTransform<Derived>::TransformCXXFoldExpr(CXXFoldExpr *E) {
       return true;
   }
 
+  if (*NumExpansions == 1) {
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cor3ntin wrote:

Should we set the flag unconditionally (regardless of the number of expansions)?

https://github.com/llvm/llvm-project/pull/110761