Address comments from CL 125123002 and additional cleanup.

dart/site/try/extracted_themes.dart

+// Copyright (c) 2014, 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 trydart.themes;
 
 /// Black Pastel theme extracted from
 /// ../editor/tools/plugins/com.google.dart.tools.deploy/themes/black-pastel.xml.
 /// Author: David.
 class Black_PastelTheme extends Theme {
   const Black_PastelTheme();
 
   String get name => 'Black Pastel';
 
@@ skipping 1455 matching lines @@
     const RettaTheme(),
     const RoboticketTheme(),
     const SchussTheme(),
     const Sublime_Text_2Theme(),
     const SunburstTheme(),
     const TangoTheme(),
     const Vibrant_InkTheme(),
     const WombatTheme(),
     const ZenburnTheme(),
 ];