[clang-tools-extra] [llvm] [clang-tidy] New check `misc-header-guard` (PR #177315)

[via cfe-commits]

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+.. title:: clang-tidy - llvm-header-guard
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+misc-header-guard
+=================
+
+Finds and fixes header guards that do not conform to the configured style
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EugeneZelenko wrote:

Please synchronize with statement in Release Notes.

https://github.com/llvm/llvm-project/pull/177315