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/modules/cloud/docker/test_docker.py

@@ -4,6 +4,7 @@ import unittest
 
 from ansible.modules.cloud.docker._docker import get_split_image_tag
 
+
 class DockerSplitImageTagTestCase(unittest.TestCase):
 
     def test_trivial(self):