style: Format with black

Signed-off-by: John Andersen <[email protected]>

Author: pdxjohnny

tests/util/testing/test_docs.py

@@ -2,20 +2,23 @@
 
 from dffml.util.testing.docs import run_doctest
 
+
 def bad_func():
     """
     >>> bad_func()
     True
     """
     return False
 
+
 def good_func():
     """
     >>> good_func()
     True
     """
     return True
 
+
 class TestDocs(unittest.TestCase):
     def test_run_doctest_bad(self):
         with self.assertRaisesRegex(Exception, "Failed example:"):