PEP8 cleanups

apps/folders/models.py

@@ -27,11 +27,11 @@ class Folder(models.Model):
     @property
     def documents(self):
         return [folder_document.document for folder_document in self.folderdocument_set.all()]
-        
+
     def remove_document(self, document):
         folder_document = self.folderdocument_set.get(document=document)
         folder_document.delete()
-    
+
     def add_document(self, document):
         folder_document, created = FolderDocument.objects.get_or_create(folder=self, document=document)
         return created