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

sky/examples/stocks2/lib/stock_app.dart

Index: sky/examples/stocks2/lib/stock_app.dart
diff --git a/sky/examples/stocks2/lib/stock_app.dart b/sky/examples/stocks2/lib/stock_app.dart
index a365c9e5294607a34cff282daf0f3160038d26fd..d11aecc98b6adfcc8da2e0a479eee656d3578a9d 100644
--- a/sky/examples/stocks2/lib/stock_app.dart
+++ b/sky/examples/stocks2/lib/stock_app.dart
@@ -221,5 +221,9 @@ class StocksApp extends App {
 
 void main() {
   print("starting stocks app!");
-  new StocksApp();
+  App app = new StocksApp();
+  app.appView.onFrame = () {
+    // uncomment this for debugging:
+    // app.appView.debugDumpRenderTree();
+  };
 }