Add extra trailing whitespace

Author: jkimbo

docs/filtering.rst

@@ -107,10 +107,10 @@ features of ``django-filter``. This is done by transparently creating a
 ``django_filters.FilterSet`` class for you and passing in the values for
 ``filter_fields``.
 
-However, you may find this to be insufficient. In these cases you can	
-create your own ``FilterSet``. You can pass it directly as follows:	
+However, you may find this to be insufficient. In these cases you can
+create your own ``FilterSet``. You can pass it directly as follows:
 
-.. code:: python	
+.. code:: python
 
     class AnimalNode(DjangoObjectType):
         class Meta: