404.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Single Page Apps for GitHub Pages</title>
    <script type="text/javascript">
                var pathSegmentsToKeep = 0;
                var l = window.location;
                l.replace(
                    l.protocol + '//' + l.hostname + (l.port ? ':' + l.port : '') +
                      l.pathname.split('/').slice(0, 1 + pathSegmentsToKeep).join('/') + '/?/' +
                      l.pathname.slice(1).split('/').slice(pathSegmentsToKeep).join('/').replace(/&/g, '~and~') +
                      (l.search ? '&' + l.search.slice(1).replace(/&/g, '~and~') : '') +
                      l.hash
                    );

              </script>
      </head>
  <body>
      </body>
</html>
  </body>
          )
  </script>
    </title>
  </head>
</html>