[libcxx-commits] [libcxx] [libc++][regex] Correctly adjust match prefix for zero-length matches. (PR #94550)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne approved this pull request.

LGTM with the comment, and also please make sure to provide a very short explanation of the bug we're fixing with this, since the only explanation is on an internal bug tracker. Basically, please make the commit message sufficient in itself to quickly understand the bug we're fixing.

https://github.com/llvm/llvm-project/pull/94550