twbs--bootstrap/_includes/old-bs-docs.html

<div class="bs-old-docs">
  <div class="container">
    <strong>
      <a href="{{ page.base_url }}2.3.2/">Looking for Bootstrap 2.3.2 docs?</a>
    </strong>
    We've moved it to a new home while we push forward with Bootstrap 3. <a href="http://blog.getbootstrap.com/">Read the blog</a> for details.
  </div>
</div>