<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <%= stylesheet_link_tag :flutie %>
    <title>Flutie v1</title>

    <style type="text/css">
    /* These are styles to make the page look nice */

    body { background-color: #dadada;}
    .content {
      background: #fff;
      padding: 40px;
      margin: 40px auto;
      width: 880px;
      -moz-border-radius: 24px;
      -webkit-border-radius: 24px;
    }
    </style>

  </head>

  <body>
    <div class="content">
      <%= yield %>
    </div>
  </body>
</html>

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <%= stylesheet_link_tag :flutie %>
    <title>Flutie v1</title>

    <style type="text/css">
    /* These are styles to make the page look nice */

    body { background-color: #dadada;}
    .content {
      background: #fff;
      padding: 40px;
      margin: 40px auto;
      width: 880px;
      -moz-border-radius: 24px;
      -webkit-border-radius: 24px;
    }
    </style>

  </head>

  <body>
    <div class="content">
      <%= yield %>
    </div>
  </body>
</html>

Use HTML5 doctype on styleguide
Use HTML5 doctype on styleguide
