fix tox pre-commit

Author: Anthony Poddubny

tests/test_placeholder.py

@@ -1,11 +1,13 @@
 import unittest
 
-from cloudshell.networking.cisco.nxos.command_templates import nxos_add_remove_vlan  # noqa: F401
+from cloudshell.networking.cisco.nxos.command_templates import (  # noqa: F401
+    nxos_add_remove_vlan,
+)
 
 
 class TestEmpty(unittest.TestCase):
     def setUp(self):
         pass
 
     def test_smth(self):
-        self.assertTrue(True)
+        self.assertTrue(True)