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

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

Author: pre-commit-ci[bot]

nbviewer/tests/test_security.py

@@ -6,6 +6,7 @@
 #  the file COPYING, distributed as part of this software.
 # -----------------------------------------------------------------------------
 import os
+from unittest.mock import patch
 
 import requests
 
@@ -15,8 +16,6 @@
 from .base import NBViewerTestCase
 from .base import skip_unless_github_auth
 
-from unittest.mock import patch
-
 
 class XSSTestCase(NBViewerTestCase):
     def _xss(self, path, pattern="<script>alert"):