[Bug libstdc++/119918] formattable returns true for types other than char and wchar_t

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119918

--- Comment #1 from Tomasz Kamiński <tkaminsk at gcc dot gnu.org> ---
This is similar to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119517.