[Bug other/80058] New: fix double spaces is string literals everywhere

["roland.illig at gmx dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80058

            Bug ID: 80058
           Summary: fix double spaces is string literals everywhere
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: roland.illig at gmx dot de
  Target Milestone: ---

Searching the whole GCC source code for the following regular expression finds
a few places in the code:

    [ ]"\n[ \t]+"[ ]

This expression finds concatenated string literals where the first ends with a
space and the second starts with a space, like these:

      gfc_warning_now (w, "Change of value in conversion from "
                       " %qs to %qs at %L",
                       gfc_typename (&src->ts), gfc_typename (&result->ts),
                       &src->where);

The above code and all similar places should be fixed so that they only have a
single space character.