Let Pytest run *all* tests that it finds.
Let Pytest run *all* tests that it finds.

Pytest thinks that any Python module that starts with "test" is a test that should be run, which was causing problems because there were several "test*.py" Python modules that weren't actually Pytest tests.  But now, those not-actually-tests have been renamed to start with "ex-" instead..

jboy/nim-pymod,jboy/nim-pymod,jboy/nim-pymod,jboy/nim-pymod