[libcxx-commits] [libcxx] [libc++] Use std::to_chars to format thread::id and canonicalize the representation across platforms (PR #181624)

[Martin Storsjö via libcxx-commits]

mstorsjo wrote:

This removed some transitive includes, which affected some projects. This isn't a big deal in practice, but if we still have the `_LIBCPP_KEEP_TRANSITIVE_INCLUDES_LLVM23` flag, we probably should cover these headers by that as well? (I wouldn't use it myself, but it would seem consistent to have that flag keep these includes as well.)

https://github.com/llvm/llvm-project/pull/181624