Make first and last getters.

lib/html/scripts/idlrenderer.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.
 
 List sorted(Iterable input, [compare, key]) {
   comparator(compare, key) {
     if (compare == null && key == null)
       return (a, b) => a.compareTo(b);
     if (compare == null)
       return (a, b) => key(a).compareTo(key(b));
@@ skipping 30 matching lines @@
      Writes the given node.
 
     Args:
       node -- a string, IDLNode instance or a list of such.
       list_separator -- if provided, and node is a list,
         list_separator will be written between the list items.
     */
     if (node == null) {
       return;
     } else if (node is String) {
-      if (output.last().endsWith('\n'))
+      if (output.last.endsWith('\n'))
         output.addAll(indent_stack);
       output.add(node);
     } else if (node is List) {
       var separator = null;
       for (var element in node) {
         w(separator);
         separator = list_separator;
         w(element);
       }
     } else if (node is IDLFile) {
@@ skipping 109 matching lines @@
     } else if (node is IDLTypeDef) {
       wln('typedef ${node.type.id} ${node.id};');
     } else {
       w('// $node\n');
     }
   };
 
   w(idl_node);
   return Strings.concatAll(output);
 }