Fix docs.dart, which has been sad and neglected.

tools/dom/docs/bin/docs.dart

 // Copyright (c) 2012, 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.
 
 /**
  * This program reads the HTML libraries from [LIB_PATH] and outputs their
  * documentation to [JSON_PATH].
  */
 
 import 'dart:io';
 import 'dart:async';
 
 import '../lib/docs.dart';
 
 final Path json_path = scriptDir.append('../docs.json').canonicalize();
 final Path lib_path = scriptDir.append('../../../../sdk/').canonicalize();
 
 main() {
   print('Converting HTML docs from $lib_path to $json_path.');
 
-  var anyErrors = convert(lib_path, json_path);
-
-  print('Converted HTML docs ${anyErrors ? "with $anyErrors" : "without"}'
-    ' errors.');
+  convert(lib_path, json_path)
+    .then((bool anyErrors) {
+      print('Converted HTML docs ${anyErrors ? "with $anyErrors" : "without"}'

[Emily Fortuna, 2013/03/27 21:21:47]

if anyErrors is true, then wouldn't this print out:
"Converted HTML docs with true errors." ? I think you want to get rid of that
string interpolation of anyErrors

[Andrei Mouravski, 2013/03/27 21:47:26]

Done.

+        ' errors.');
+    });
 }
 
 /**
  * Gets the full path to the directory containing the entrypoint of the current
  * script.
  */
 Path get scriptDir =>
-    new Path(new Options().script).directoryPath;
+    new Path(new Options().script).directoryPath;