[Bug libstdc++/78231] Should std::sort use unqualifed iter_swap?

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78231

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also 17.6.5.4 [global.functions] p4.