[4.2.x] Refs #33476 -- Applied Black's 2023 stable style.

Black 23.1.0 is released which, as the first release of the year,
introduces the 2023 stable style. This incorporates most of last year's
preview style.

https://github.com/psf/black/releases/tag/23.1.0

Backport of 097e3a70c1 from main

tests/gis_tests/layermap/tests.py

@@ -233,6 +233,7 @@ class LayerMapTest(TestCase):
 
     def test_test_fid_range_step(self):
         "Tests the `fid_range` keyword and the `step` keyword of .save()."
+
         # Function for clearing out all the counties before testing.
         def clear_counties():
             County.objects.all().delete()