Use dartfmt on Observatory code

runtime/observatory/lib/src/repositories/target.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 TargetChangeEvent implements M.TargetChangeEvent {
   final TargetRepository repository;
   final bool disconnected;
   TargetChangeEvent(this.repository, [this.disconnected = false]);
 }
 
 class TargetRepository implements M.TargetRepository {
-
   static const _historyKey = 'history';
 
   final StreamController<TargetChangeEvent> _onChange;
   final Stream<TargetChangeEvent> onChange;
   final SettingsRepository _settings = new SettingsRepository('targetManager');
 
   final List<SC.WebSocketVMTarget> _list = <SC.WebSocketVMTarget>[];
   SC.WebSocketVMTarget current;
 
   factory TargetRepository() {
@@ skipping 50 matching lines @@
 
   /// Read settings from data store.
   void _restore() {
     _list.clear();
     var loaded = _settings.get(_historyKey);
     if (loaded == null) {
       return;
     }
     _list.addAll(loaded.map((i) => new SC.WebSocketVMTarget.fromMap(i)));
     _list.sort((SC.WebSocketVMTarget a, SC.WebSocketVMTarget b) {
-       return b.lastConnectionTime.compareTo(a.lastConnectionTime);
+      return b.lastConnectionTime.compareTo(a.lastConnectionTime);
     });
   }
 
   /// After making a change, update settings.
   void _store() {
-    _settings.set(_historyKey,  _list);
+    _settings.set(_historyKey, _list);
   }
 
   /// Find by networkAddress.
   SC.WebSocketVMTarget _find(String networkAddress) {
     for (SC.WebSocketVMTarget item in _list) {
       if (item.networkAddress == networkAddress) {
         return item;
       }
     }
     return null;
   }
 
   static String _networkAddressOfDefaultTarget() {
     if (Utils.runningInJavaScript()) {
       // We are running as JavaScript, use the same host that Observatory has
       // been loaded from.
       return 'ws://${window.location.host}/ws';
     } else {
       // Otherwise, assume we are running from Dart Editor and want to connect
       // to the default host.
       return 'ws://localhost:8181/ws';
     }
   }
 }