Make Node.nodes.insertAll take an end-positioned index.

tests/html/node_test.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.
 
 library NodeTest;
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 import 'dart:svg' as svg;
 
@@ skipping 298 matching lines @@
 
       expect(node.nodes[0], isText);
       expect(node.nodes[1], isHRElement);
       expect(node.nodes[2], isImageElement);
       expect(node.nodes[3], isInputElement);
       expect(node.nodes[4], isBRElement);
       expect(node.nodes[5], isHRElement);
       expect(node.nodes[6], isImageElement);
       expect(node.nodes[7], isInputElement);
       expect(node.nodes[8], isComment);
+
+      var d = new DivElement();
+      var ns = d.nodes;
+      // `insertAll` should work when positioned at end.
+      ns.insertAll(ns.length, [new HRElement()]);
+      expect(ns.length, 1);
+      expect(ns[0], isHRElement);
     });
 
     testUnsupported('removeRange', () {
       makeNodeWithChildren().nodes.removeRange(0, 1);
     });
 
     testUnsupported('replaceRange', () {
       makeNodeWithChildren().nodes.replaceRange(0, 1, [new InputElement()]);
     });
 
@@ skipping 15 matching lines @@
     });
 
     test('TreeWalker', () {
       var root = makeNodeWithChildren();
       var treeWalker = new TreeWalker(root, NodeFilter.SHOW_COMMENT);
       expect(treeWalker.nextNode(), isComment);
       expect(treeWalker.nextNode(), isNull);
     });
   });
 }