Fixing pep8 issues

Author: eduarde

graphene_mongo/fields.py

@@ -213,4 +213,4 @@ def get_resolver(self, parent_resolver):
         super_resolver = self.resolver or parent_resolver
         resolver = partial(
             self.chained_resolver, super_resolver, isinstance(super_resolver, partial))
-        return partial(self.connection_resolver, resolver, self.type)
+        return partial(self.connection_resolver, resolver, self.type)

graphene_mongo/tests/test_relay_query.py

@@ -1077,4 +1077,3 @@ class Query(graphene.ObjectType):
 
     assert not result.errors
     assert json.dumps(result.data, sort_keys=True) == json.dumps(expected, sort_keys=True)
-