[libcxx-commits] [libcxx] [libc++][NFC] Make AssertionInfoMatcher::CheckMessageMatches Stricter (PR #77721)

[Will Hawkins via libcxx-commits]

hawkinsw wrote:

Please feel free to ignore this change if it is unwanted. The tests that I ran locally all seem to pass with the stricter checking. I'll wait to see what it looks like on a full run of CI. 

https://github.com/llvm/llvm-project/pull/77721