[Bug libstdc++/109111] Definition of repeat_view::_Iterator has wrong template-head

[john at drouhard dot dev via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109111

--- Comment #1 from John Drouhard <john at drouhard dot dev> ---
https://godbolt.org/z/csozden6e

example of gcc not diagnosing mismatched requires clauses (and clang correctly
doing so).