[clang] [llvm] [clang] Clang multi-match behavior of WarningSuppressionMappings (PR #162237)

[Vitaly Buka via llvm-commits]

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@@ -971,7 +971,7 @@ class DiagnosticsEngine : public RefCountedBase<DiagnosticsEngine> {
   /// diagnostics in specific files.
   /// Mapping file is expected to be a special case list with sections denoting
   /// diagnostic groups and `src` entries for globs to suppress. `emit` category
-  /// can be used to disable suppression. Longest glob that matches a filepath
+  /// can be used to disable suppression. THe last glob that matches a filepath
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vitalybuka wrote:

And it's very uncommon case ON/OFF with "emit".
I see how it can be theoretically useful and good for completeness, but liky only suppression case is used to temporarily suppression. 

https://github.com/llvm/llvm-project/pull/162237