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

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

Author: pre-commit-ci[bot]

mypy/test/teststubtest.py

@@ -9,9 +9,9 @@
 import tempfile
 import textwrap
 import unittest
+import unittest.mock
 from collections.abc import Iterator
 from typing import Any, Callable
-import unittest.mock
 
 import mypy.stubtest
 from mypy import build, nodes
@@ -1668,9 +1668,7 @@ def test_not_subclassable(self) -> Iterator[Case]:
     @collect_cases
     def test_disjoint_base(self) -> Iterator[Case]:
         # TODO: Remove this patch once PEP 800 is accepted
-        with unittest.mock.patch.object(
-            sys, "argv", new=sys.argv + ["--check-disjoint-bases"]
-        ):
+        with unittest.mock.patch.object(sys, "argv", new=sys.argv + ["--check-disjoint-bases"]):
             yield Case(
                 stub="""
                 class A: pass