PEP8 cleanups, E501: 79 character long lines.

mayan/apps/sources/handlers.py

@@ -15,6 +15,8 @@ def create_default_document_source(sender, **kwargs):
 def copy_transformations_to_version(sender, **kwargs):
     instance = kwargs['instance']
 
+    # TODO: Fix this, source should be previous version
+    # TODO: Fix this, shouldn't this be at the documents app
     Transformation.objects.copy(source=instance.document, targets=instance.pages.all())