Get dartdoc running again.

utils/dartdoc/dartdoc.dart

 // Copyright (c) 2011, 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.
 
 /**
  * To use it, from this directory, run:
  *
  *     $ ./dartdoc <path to .dart file>
  *
  * This will create a "docs" directory with the docs for your libraries. To
@@ skipping 90 matching lines @@
     : _comments = new CommentMap() {
     // Patch in support for [:...:]-style code to the markdown parser.
     // TODO(rnystrom): Markdown already has syntax for this. Phase this out?
     md.InlineParser.syntaxes.insertRange(0, 1,
         new md.CodeSyntax(@'\[\:((?:.|\n)*?)\:\]'));
 
     md.setImplicitLinkResolver(resolveNameReference);
   }
 
   document(String entrypoint) {
+    var oldDietParse = options.dietParse;
     try {
-      var oldDietParse = options.dietParse;
       options.dietParse = true;
 
       // Handle the built-in entrypoints.
       switch (entrypoint) {
         case 'corelib':
           world.getOrAddLibrary('dart:core');
           world.getOrAddLibrary('dart:coreimpl');
           world.getOrAddLibrary('dart:json');
           world.process();
           break;
@@ skipping 718 matching lines @@
 
     return new md.Element.text('code', name);
   }
 
   // TODO(rnystrom): Move into SourceSpan?
   int getSpanColumn(SourceSpan span) {
     final line = span.file.getLine(span.start);
     return span.file.getColumn(line, span.start);
   }
 }