Fixed #33657 -- Allowed customizing formatter class of argument parsers.

tests/user_commands/tests.py

@@ -1,4 +1,5 @@
 import os
+from argparse import ArgumentDefaultsHelpFormatter
 from io import StringIO
 from unittest import mock
 
@@ -408,8 +409,14 @@ class CommandTests(SimpleTestCase):
     def test_create_parser_kwargs(self):
         """BaseCommand.create_parser() passes kwargs to CommandParser."""
         epilog = "some epilog text"
-        parser = BaseCommand().create_parser("prog_name", "subcommand", epilog=epilog)
+        parser = BaseCommand().create_parser(
+            "prog_name",
+            "subcommand",
+            epilog=epilog,
+            formatter_class=ArgumentDefaultsHelpFormatter,
+        )
         self.assertEqual(parser.epilog, epilog)
+        self.assertEqual(parser.formatter_class, ArgumentDefaultsHelpFormatter)
 
     def test_outputwrapper_flush(self):
         out = StringIO()