[clang] [clang] Fix-it hint for `++this` -> `++*this` when deref is modifiable (PR #94159)

[via cfe-commits]

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@@ -9,7 +9,15 @@ void h() {
   SEL s = @selector(dealloc);
   SEL* ps = &s;
 
+  /*
+   FIXME: https://github.com/llvm/llvm-project/pull/94159
+   
+   This would assign the value of s to the SEL object pointed to by @selector(dealloc). However, in Objective-C, selectors are not pointers, they are special compile-time constructs representing method names, and they are immutable, so you cannot assign values to them.
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Sirraide wrote:

Actually, one more thing: I’d format the FIXME comment here so it’s not just one long line and also include that the FIXME is about the suggestion to insert `*` specifically.

https://github.com/llvm/llvm-project/pull/94159