Minor syntax detail.

src/App/ZoneInterface.purs

@@ -568,7 +568,8 @@ handleAction = case _ of
     H.modify_ \s -> s { _currentRR { mechanisms = case s._currentRR.mechanisms of
                                        Just ms -> Just (remove_id i $ attach_id 0 ms)
                                        Nothing -> Nothing
-      } }
+                                   }
+                      }
 
   SPF_Mechanism_Add -> do
     state <- H.get