[Bug libstdc++/120997] std::span::subspan returns initializer list

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120997

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yeah we have a defect in the C++26 draft, which needs to be fixed.