[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

tests/test_oauth2_backends.py

@@ -176,7 +176,6 @@ def setUp(self):
         self.factory = RequestFactory()
         self.oauthlib_core = JSONOAuthLibCore()
 
-
         uri, http_method, body, headers = self.oauthlib_core._extract_params(request)
         self.assertIn("grant_type=password", body)
         self.assertIn("username=john", body)