[Bug libstdc++/88607] forward_list.h contains utf-8 charactor

[fudou...@m-japan.co.jp]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88607

--- Comment #2 from hirofumi fudoudou <fudou...@m-japan.co.jp> ---
but this is just a comment.
not a code.

just remove or change the char to 'f' and 'I'.