Fix lint error

gwcelery/tasks/external_triggers.py

@@ -310,7 +310,7 @@ def handle_grb_igwn_alert(alert):
             # done by the same function since they are so similar
             group(
                 raven.raven_pipeline.si([alert['object']], superevent_id,
-                                     superevent, tl, th, gw_group),
+                                        superevent, tl, th, gw_group),
 
                 external_skymaps.create_combined_skymap.si(
                     superevent_id, ext_id