anchor.diff:  <body>  
     <div class="container_12">
   
  -  	<div class="grid_12">
  +    <div class="grid_12">
         <h1>cloud exchange</h1>     
         <!--# block name="empty" --><!--# endblock -->
         <h2><%= @which %> &mdash; $<!--# include virtual="/data/<%= @which %>.txt" stub="empty" --></h2>
  -  	</div>
  +    </div>
   
  -  	<div class="clear"></div>
  +    <div class="clear"></div>
   
     	<div class="grid_8">
         <script type="text/javascript" src="/amstock/swfobject.js"></script>
  
positive.code:   </script>
  
  </body>
  
  </html>
  
negative.code: <html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="author" content="Tim Lossen" />
    <meta name="description" content="realtime charts of amazon ec2 spot prices" />
    <meta name="keywords" content="amazon, aws, ec2, spot price, pricing, charts, visualization, cloud computing" />
    <meta name="robots" content="all">
    <title><%= @which %> &mdash; cloud exchange</title>
    <link rel="stylesheet" href="/css/reset.css" />
    <link rel="stylesheet" href="/css/text.css" />
    <link rel="stylesheet" href="/css/960.css" />
    <link rel="icon" type="image/ico" href="/favicon.ico"/>
    <link rel="shortcut icon" type="image/ico" href="/favicon.ico"/>
  
    <style>
      a { text-decoration: none; }
      a:hover { text-decoration: underline; }
  