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

tests/servers/test_liveserverthread.py

@@ -7,7 +7,6 @@ from django.test.testcases import LiveServerThread
 # otherwise closing the connection would implicitly rollback and not set the
 # connection to None.
 class LiveServerThreadTest(TransactionTestCase):
-
     available_apps = []
 
     def run_live_server_thread(self, connections_override=None):

tests/servers/tests.py

@@ -30,7 +30,6 @@ TEST_SETTINGS = {
 
 @override_settings(ROOT_URLCONF="servers.urls", **TEST_SETTINGS)
 class LiveServerBase(LiveServerTestCase):
-
     available_apps = [
         "servers",
         "django.contrib.auth",
@@ -56,7 +55,6 @@ class CloseConnectionTestServer(ThreadedWSGIServer):
 
 
 class CloseConnectionTestLiveServerThread(LiveServerThread):
-
     server_class = CloseConnectionTestServer
 
     def _create_server(self, connections_override=None):
@@ -64,7 +62,6 @@ class CloseConnectionTestLiveServerThread(LiveServerThread):
 
 
 class LiveServerTestCloseConnectionTest(LiveServerBase):
-
     server_thread_class = CloseConnectionTestLiveServerThread
 
     @classmethod