fizzy/app/views/errors/not_found.html.erb

<% @page_title = "404 Not Found" %>

<hgroup class="error-page__stamp">
  <h1>404</h1>
  <h2>Sorry, that page doesn’t exist!</h2>
  <hr />
  <div>You may have mistyped the address or the page may have moved.</div>
</hgroup>