[clang] [clang][Sema] Fix false-positive -Wshadow for friend functions (PR #221249)

[Bruno De Fraine via cfe-commits]

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@@ -492,6 +492,8 @@ features cannot lower the translation-unit ABI level;
   `operator delete`, since such a delete expression never invokes the
   destructor. (#GH65524)
 
+- Fixed a false-positive `-Wshadow` warning when a function parameter in an inline-defined friend function shares the name of a non-static class member variable. (#GH221190)
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brunodf-gf wrote:

I would write more generally "when a variable in..." instead of "when a function parameter in...".

Also, you should probably insert newlines and spaces to hard-wrap and indent the text.

https://github.com/llvm/llvm-project/pull/221249