test/: PEP8 compliancy (#24803)

* test/: PEP8 compliancy

- Make PEP8 compliant

* Python3 chokes on casting int to bytes (#24952)

But if we tell the formatter that the var is a number, it works

test/units/plugins/connection/test_network_cli.py

@@ -143,7 +143,6 @@ class TestConnectionClass(unittest.TestCase):
         self.assertFalse(mock_open_shell.called)
         mock_send.assert_called_with({'command': b'command'})
 
-
     def test_network_cli_send(self):
         pc = PlayContext()
         new_stdin = StringIO()