| Index: lib/src/pubsub_impl.dart | 
| diff --git a/lib/src/pubsub_impl.dart b/lib/src/pubsub_impl.dart | 
| index 9c482dfa346a21060488f11de7e5e032b6a4b5a1..6a4fc905f9c955a203065c297fe7b3dc6b208d8f 100644 | 
| --- a/lib/src/pubsub_impl.dart | 
| +++ b/lib/src/pubsub_impl.dart | 
| @@ -107,7 +107,7 @@ class _PubSubImpl implements PubSub { | 
| ..ackIds = [ ackId ]; | 
| // The Pub/Sub acknowledge API returns an instance of Empty. | 
| return _api.projects.subscriptions.acknowledge( | 
| -        request, subscription).then((_) => null);; | 
| +        request, subscription).then((_) => null); | 
| } | 
|  | 
| void _checkTopicName(name) { | 
|  |