[Bug fortran/78822] [cleanup] replace static char buffers by std:string

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78822

--- Comment #10 from janus at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #9)
> best discuss this on the
> mailing list rather than in the PR where others can more easily see it and
> comment on it.

Agreed. Will do.