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/playbook/test_playbook.py

@@ -21,13 +21,13 @@ __metaclass__ = type
 
 from ansible.compat.tests import unittest
 from ansible.compat.tests.mock import patch, MagicMock
-
 from ansible.errors import AnsibleError, AnsibleParserError
 from ansible.playbook import Playbook
 from ansible.vars.manager import VariableManager
 
 from units.mock.loader import DictDataLoader
 
+
 class TestPlaybook(unittest.TestCase):
 
     def setUp(self):
@@ -42,7 +42,7 @@ class TestPlaybook(unittest.TestCase):
 
     def test_basic_playbook(self):
         fake_loader = DictDataLoader({
-            "test_file.yml":"""
+            "test_file.yml": """
             - hosts: all
             """,
         })