[clang] [clang] Implement __attribute__((format_matches)) (PR #116708)

[Erich Keane via cfe-commits]

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@@ -145,6 +145,7 @@ void test_multiple_format_strings(const char *fmt1, const char *fmt2) {
         expected-warning{{passing 'os_log' format string where 'printf' format string is expected}}
 }
 
+// MARK: - 
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erichkeane wrote:

what does this mean?

https://github.com/llvm/llvm-project/pull/116708