implement fetch_pending()
diff --git a/planetstack/observer/steps/sync_sliver_ips.py b/planetstack/observer/steps/sync_sliver_ips.py
index 50ec6ad..fb4fd5b 100644
--- a/planetstack/observer/steps/sync_sliver_ips.py
+++ b/planetstack/observer/steps/sync_sliver_ips.py
@@ -7,6 +7,7 @@
 class SyncSliverIps(OpenStackSyncStep):
     provides=[Sliver]
     requested_interval=0
+
     def fetch_pending(self):
         slivers = Sliver.objects.filter(ip=None)
         return slivers