[Bug libstdc++/106808] std::string_view range concept requirement causes compile error with Boost.Filesystem

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106808

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oh good, I hoped that would be the case. I was already planning to backport
that change to gcc-11 and gcc-12.