PEP8 Cleanups (471 warnings).

mayan/apps/documents/migrations/0013_document_is_stub.py

@@ -22,7 +22,9 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='document',
             name='is_stub',
-            field=models.BooleanField(default=True, verbose_name='Is stub?', editable=False),
+            field=models.BooleanField(
+                default=True, verbose_name='Is stub?', editable=False
+            ),
             preserve_default=True,
         ),
         migrations.RunPython(make_existing_documents_not_stubs),

mayan/apps/documents/models.py

@@ -616,6 +616,7 @@ class DocumentTypeFilename(models.Model):
     def __str__(self):
         return self.filename
 
+
 @python_2_unicode_compatible
 class DocumentPage(models.Model):
     """

mayan/apps/documents/tests/test_models.py

@@ -163,6 +163,7 @@ class DocumentVersionTestCase(TestCase):
     def test_revert_version(self):
         self.assertEqual(self.document.versions.count(), 1)
 
+        # Needed by MySQL as milliseconds value is not store in timestamp field
         time.sleep(1)
 
         with open(TEST_DOCUMENT_PATH) as file_object: