Wrap lines at 79 charcters.

Fixes PEP8 E501 errors in 'tox -e lint'.

Author: tseaver

gcloud/datastore/connection.py

@@ -398,7 +398,8 @@ def delete_entities(self, dataset_id, key_pbs):
 
         :rtype: boolean (if in a transaction) or else
                 :class:`gcloud.datastore.datastore_v1_pb2.MutationResult`.
-        :returns: True (if in a transaction) or else a mutation result protobuf.
+        :returns: True (if in a transaction) or else a mutation result
+                  protobuf.
         """
         mutation = self.mutation()
 
@@ -428,6 +429,7 @@ def delete_entity(self, dataset_id, key_pb):
 
         :rtype: boolean (if in a transaction) or else
                 :class:`gcloud.datastore.datastore_v1_pb2.MutationResult`.
-        :returns: True (if in a transaction) or else a mutation result protobuf.
+        :returns: True (if in a transaction) or else a mutation result
+                  protobuf.
         """
         return self.delete_entities(dataset_id, [key_pb])