[Bug fortran/103054] [f18] Gfortran accepts invalid and rejects valid co_reduce argument keyword name

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103054

--- Comment #4 from kargl at gcc dot gnu.org ---
Created attachment 51745
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51745&action=edit
documentation update

Forgot the documentation part of the patch.