[Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers

[tschwinge at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80221

--- Comment #9 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
You could further optimize the script to omit "." locations: if the "dg-*"
directive actually is placed on the appropriate line already.