Switch to side-by-side view

--- a/Allura/allura/model/notification.py
+++ b/Allura/allura/model/notification.py
@@ -287,7 +287,7 @@
             app_config_id=app_config_id,
             artifact_index_id=None)
         if tool_already_subscribed:
-            log.warning('Tried to subscribe to artifact %s, while there is a tool subscription', artifact)
+            log.debug('Tried to subscribe to artifact %s, while there is a tool subscription', artifact)
             return
         if artifact is None:
             artifact_title = 'All artifacts'