Format docstring

synapse/storage/events_worker.py

@@ -52,8 +52,9 @@ _EventCacheEntry = namedtuple("_EventCacheEntry", ("event", "redacted_event"))
 
 class EventsWorkerStore(SQLBaseStore):
     def get_received_ts(self, event_id):
-        """Get received_ts (when it was persisted) for the event. Raises an
-        exception for unknown events.
+        """Get received_ts (when it was persisted) for the event.
+
+        Raises an exception for unknown events.
 
         Args:
             event_id (str)