Hey Folks
Following last week meeting, I updated D3258R0
https://isocpp.org/files/papers/D3258R0.pdf

Mark had some concerns here (I am starting a new thread to avoid having
multiple interleaved discussions)
https://lists.isocpp.org/sg16/2024/05/4302.php

After talking with Jonathan, we decided the best solution to address those
concerns is to not modify basic_format_arg.
I also fixed some latex formatting issues, and added some information in
the "constexpr" section at Victor's request.

Thanks,

Corentin