pubsub: fix typo
@@ -251,7 +251,7 @@ func (tps *TopicIterator) Next() (*Topic, error) {
return newTopic(tps.c, topicName), nil
}
-// ID returns the unique idenfier of the topic within its project.
+// ID returns the unique identifier of the topic within its project.
func (t *Topic) ID() string {
slash := strings.LastIndex(t.name, "/")
if slash == -1 {
