Make first and last getters.

samples/markdown/block_parser.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.
 
 /// The line contains only whitespace or is empty.
 const _RE_EMPTY = const RegExp(r'^([ \t]*)$');
 
 /// A series of `=` or `-` (on the next line) define setext-style headers.
 const _RE_SETEXT = const RegExp(r'^((=+)|(-+))$');
 
@@ skipping 282 matching lines @@
       } else if (tryMatch(_RE_INDENT)) {
         // Strip off indent and add to current item.
         childLines.add(match[1]);
       } else if (BlockSyntax.isAtBlockEnd(parser)) {
         // Done with the list.
         break;
       } else {
         // Anything else is paragraph text or other stuff that can be in a list
         // item. However, if the previous item is a blank line, this means we're
         // done with the list and are starting a new top-level paragraph.
-        if ((childLines.length > 0) && (childLines.last() == '')) break;
+        if ((childLines.length > 0) && (childLines.last == '')) break;
         childLines.add(parser.current);
       }
       parser.advance();
     }
 
     endItem();
 
     // Markdown, because it hates us, specifies two kinds of list items. If you
     // have a list like:
     //
@@ skipping 113 matching lines @@
     while (!BlockSyntax.isAtBlockEnd(parser)) {
       childLines.add(parser.current);
       parser.advance();
     }
 
     final contents = parser.document.parseInline(
         Strings.join(childLines, '\n'));
     return new Element('p', contents);
   }
 }