In <https://lists.gnu.org/archive/html/bug-gnulib/2024-03/msg00105.html> I outlined how a test suite for gnulib-tool could look like.
Now I created such a test suite. You find it in the maint-tools repository [1] (use the 'git clone' command of gnulib, replacing gnulib.git with gnulib/maint-tools.git ). Collin, feel free to submit additional test cases, that are not yet well covered by the existing test cases. Bruno [1] https://git.savannah.gnu.org/gitweb/?p=gnulib/maint-tools.git