<html>

  <head>
    <title>collapse_whitespace example    </title>
    <script> var x = 'Hello,   world!';</script>
  </head>

  <body>
    Whitespace    is collapsed

        in general.
    <pre>
      But not in a

        &lt;pre&gt; tag.
    </pre>
  </body>

</html>