Improve the RenderObject.toString() logic so that there's not blank lines everywhere and to general…

sky/sdk/lib/framework/fn2.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 library fn;
 
 import 'app.dart';
 import 'dart:async';
 import 'dart:collection';
 import 'dart:mirrors';
@@ skipping 966 matching lines @@
 }
 
 abstract class App extends Component {
 
   App() : super(stateful: true) {
     _appView = new _AppView();
     _scheduleComponentForRender(this);
   }
 
   AppView _appView;
+  AppView get appView => _appView;
 
   void _buildIfDirty() {
     assert(_dirty);
     assert(!_defunct);
     _trace('$_key rebuilding app...');
     _sync(null, null);
     if (root.parent == null)
       _appView.root = root;
     assert(root.parent is RenderView);
   }
 }
 
 class Text extends Component {
   Text(this.data) : super(key: '*text*');
   final String data;
   bool get interchangeable => true;
   UINode build() => new Paragraph(text: data);
 }