Also fix uri_query_test.

tests/corelib/uri_test.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.
 
 library uriTest;
 
 import "package:expect/expect.dart";
 import 'dart:convert';
 
 testUri(String uri, bool isAbsolute) {
@@ skipping 342 matching lines @@
   uri = new Uri(scheme: "file", path: "y");
   Expect.equals("file:///y", uri.toString());
 
   // Empty host/query/fragment ensures the delimiter is there.
   // Different from not being there.
   Expect.equals("scheme:/", Uri.parse("scheme:/").toString());
   Expect.equals("scheme:/",
                 new Uri(scheme: "scheme", path: "/").toString());
 
   Expect.equals("scheme:///?#", Uri.parse("scheme:///?#").toString());
-  Expect.equals("scheme:///?#",
+  Expect.equals("scheme:///#",
                 new Uri(scheme: "scheme", host: "", path: "/",
                         query: "", fragment: "").toString());
 }
 
 main() {
   testUri("http:", true);
   testUri("file://", true);
   testUri("file", false);
   testUri("http://user@example.com:8080/fisk?query=89&hest=silas", true);
   testUri("http://user@example.com:8080/fisk?query=89&hest=silas#fragment",
@@ skipping 160 matching lines @@
 String dump(Uri uri) {
   return "URI: $uri\n"
       "  Scheme:    ${uri.scheme} #${uri.scheme.length}\n"
       "  User-info: ${uri.userInfo} #${uri.userInfo.length}\n"
       "  Host:      ${uri.host} #${uri.host.length}\n"
       "  Port:      ${uri.port}\n"
       "  Path:      ${uri.path} #${uri.path.length}\n"
       "  Query:     ${uri.query} #${uri.query.length}\n"
       "  Fragment:  ${uri.fragment} #${uri.fragment.length}\n";
 }