zulip/templates/zerver/tutorial_finale.html

<div class="modal hide" id="tutorial-finale" tabindex="-1" role="dialog"
     aria-labelledby="tutorial-finale-label" aria-hidden="true">
  <div class="modal-header">
    <h3 id="tutorial-finale-label">Welcome to Zulip</h3>
  </div>
  <div class="modal-body">
    <p>Streams, topics, and narrowing make Zulip conversations
    efficient and productive.</p>

    <p>That's all there is to it, so let's get started!</p>
  </div>
  <div class="modal-footer">
      <button class="btn btn-primary" type="submit" id="tutorial-get-started">Get started</button>
  </div>
</div>