[Bug libstdc++/109162] C++23 improvements to std::format

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109162

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
> https://wg21.link/P2693R1 formatting thread::id and stacktrace

This has been implemented for gcc-14