Black tests
This changes black config to not exclude tests, once we are ready to
merge this we can use pre-commit.ci autofix to actually apply black,
thereby not having to worry if something more slipped in.
@@ -19,7 +19,6 @@ exclude = '''
| htmlcov
| benchmarks
| examples # No need to Black examples
- | test # Tests are a mess, don't black them
| test_reports
| rdflib.egg-info
| buck-out
