Format samples and samples-dev directories.

samples-dev/swarm/swarm_ui_lib/observable/EventBatch.dart

Index: samples-dev/swarm/swarm_ui_lib/observable/EventBatch.dart
diff --git a/samples-dev/swarm/swarm_ui_lib/observable/EventBatch.dart b/samples-dev/swarm/swarm_ui_lib/observable/EventBatch.dart
index e72979a46780d9ac69e2dee14ceee694a637fe90..fc6c7fee4300d693766fdc0ba2b61a2e6ba0cd25 100644
--- a/samples-dev/swarm/swarm_ui_lib/observable/EventBatch.dart
+++ b/samples-dev/swarm/swarm_ui_lib/observable/EventBatch.dart
@@ -11,7 +11,6 @@ part of observable;
  * AbstractObservable, which works with this class to implement batching.
  */
 class EventBatch {
-
   /** The current active batch, if any. */
   static EventBatch current;
 
@@ -88,7 +87,7 @@ class EventBatch {
     int uid = obj.uid;
     EventSummary summary = summaries[uid];
     if (summary == null) {
-      assert (!sealed);
+      assert(!sealed);
       summary = new EventSummary(obj);
       summaries[uid] = summary;
     }