Fix issues that broke editing on browsers without Shadow DOM support.

dart/site/try/src/decoration.dart

Index: dart/site/try/src/decoration.dart
diff --git a/dart/site/try/src/decoration.dart b/dart/site/try/src/decoration.dart
index 663aeea44ea909bb155541f89399a3c865e76097..97efd2a7220a7a84041a93f3bda23e00b76b75d3 100644
--- a/dart/site/try/src/decoration.dart
+++ b/dart/site/try/src/decoration.dart
@@ -68,8 +68,8 @@ class DiagnosticDecoration extends Decoration {
     return element..append(
         new AnchorElement()
             ..classes.add('diagnostic')
-            ..nodes.addAll(nodes)
-            ..append(tip));
+            ..append(tip)

[ahe, 2014/06/27 11:23:27]

Assume the user have written "foo" and we want to show a diagnostic around
"foo".  We have two options:

1. <a class="diagnostic">foo<span>tip</span></a>

2. <a class="diagnostic"><span>tip</span>foo</a>

Turns out that option 1 doesn't work well with backspace in Firefox. So option 2
it is :-)

[Johnni Winther, 2014/07/02 08:40:53]

Put this explanation as comment in the code.

[ahe, 2014/07/04 13:52:00]

Done.

+            ..nodes.addAll(nodes));
   }
 }