[Bug libstdc++/120415] [14/15/16 Regression] rejects C++ code since r14-11483

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120415

--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I've added a note to the bottom of
https://gcc.gnu.org/gcc-14/porting_to.html#cxx20-iterators which links to
https://gcc.gnu.org/gcc-15/porting_to.html#cxx20-iterators