fix comments

registry/zookeeper/registry.go

@@ -120,6 +120,7 @@ func newMockZkRegistry(url *common.URL, opts ...zookeeper.Option) (*zk.TestClust
 
 func (r *zkRegistry) InitListeners() {
 	r.listener = zookeeper.NewZkEventListener(r.client)
+
 	r.dataListener = NewRegistryDataListener()
 }