[clang-tools-extra] [clang-tidy] Fix broken HeaderFilterRegex when read from config file (PR #133582)

tearfur wrote: P.S. Just a heads up that `Fixes #118009, #121969, #133453` is not linking this PR to all 3 issues. They need to be split to 3 `Fixes #xxx` lines. https://github.com/llvm/llvm-project/pull/133582 ___ cfe-commits mailing list cfe-commit

[clang-tools-extra] [clang-tidy] Fix broken HeaderFilterRegex when read from config file (PR #133582)

tearfur wrote: Tested by applying this PR on top of 3e742b517a0606bfed329dfcb8c34c614ed73ea7. Works great AFAICT! ```console # curl -sL 'https://github.com/llvm/llvm-project/pull/133582.diff' | git apply ``` https://github.com/llvm/llvm-project/pull/133582 _