[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/serializers/test_data.py

@@ -449,7 +449,7 @@ def serializerTest(self, format):
     # Create all the objects defined in the test data
     objects = []
     instance_count = {}
-    for (func, pk, klass, datum) in test_data:
+    for func, pk, klass, datum in test_data:
         with connection.constraint_checks_disabled():
             objects.extend(func[0](pk, klass, datum))
 
@@ -468,7 +468,7 @@ def serializerTest(self, format):
 
     # Assert that the deserialized data is the same
     # as the original source
-    for (func, pk, klass, datum) in test_data:
+    for func, pk, klass, datum in test_data:
         func[1](self, pk, klass, datum)
 
     # Assert that the number of objects deserialized is the