Use dartfmt on Observatory code

runtime/observatory/lib/src/repositories/notification.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of repositories;
 
 class NotificationChangeEvent implements M.NotificationChangeEvent {
   final NotificationRepository repository;
   NotificationChangeEvent(this.repository);
 }
 
 class NotificationRepository implements M.NotificationRepository {
   final List<M.Notification> _list = new List<M.Notification>();
 
   final StreamController<M.NotificationChangeEvent> _onChange =
       new StreamController<M.NotificationChangeEvent>.broadcast();
   Stream<M.NotificationChangeEvent> get onChange => _onChange.stream;
 
   void add(M.Notification notification) {
     assert(notification != null);
     _list.add(notification);
     _notify();
   }
 
   Iterable<M.Notification> list() => _list;
 
   void delete(M.Notification notification) {
-    if (_list.remove(notification))
-    _notify();
+    if (_list.remove(notification)) _notify();
   }
 
   void deleteAll() {
     if (_list.isNotEmpty) {
       _list.clear();
       _notify();
     }
   }
 
   NotificationRepository();
 
   void _notify() {
     _onChange.add(new NotificationChangeEvent(this));
   }
 
   void deleteWhere(bool test(M.Notification element)) {
     int length = _list.length;
     _list.removeWhere(test);
     if (_list.length != length) _notify();
   }
 
   void deletePauseEvents({M.Isolate isolate}) {
     if (isolate == null) {
       deleteWhere((notification) {
         return notification is M.EventNotification &&
-               M.Event.isPauseEvent(notification.event);
+            M.Event.isPauseEvent(notification.event);
       });
     } else {
       deleteWhere((notification) {
         return notification is M.EventNotification &&
-               M.Event.isPauseEvent(notification.event) &&
-               notification.event.isolate == isolate;
+            M.Event.isPauseEvent(notification.event) &&
+            notification.event.isolate == isolate;
       });
     }
   }
 
   void deleteDisconnectEvents() {
     deleteWhere((notification) {
       return notification is M.EventNotification &&
-             notification.event is M.ConnectionClosedEvent;
+          notification.event is M.ConnectionClosedEvent;
     });
   }
 }