[clang] Disable -fdollars-in-identifiers by default (PR #135407)

[Shafik Yaghmour via cfe-commits]

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@@ -7,7 +7,7 @@
 #define foo`bar   /* expected-error {{whitespace required after macro name}} */
 #define foo2!bar  /* expected-warning {{whitespace recommended after macro name}} */
 
-#define foo3$bar  /* expected-error {{'$' in identifier}} */
+#define foo3$bar  /* expected-error {{whitespace required after macro name}} */
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shafik wrote:

Why does this diagnostic change?

https://github.com/llvm/llvm-project/pull/135407