vendor/bundle/ruby/2.4.0/gems/kramdown-1.14.0/test/testcases/block/12_extension/options.html

<h1>No header id</h1>

<h1>without header id</h1>

<div>
some <span>*para*</span>
</div>

<div>
  <p>some <span><em>para</em></span></p>
</div>

<p>Some text<sup id="fnref:ab"><a href="#fn:ab" class="footnote">10</a></sup>.</p>

<div class="footnotes">
  <ol start="10">
    <li id="fn:ab">
      <p>Some text.&nbsp;<a href="#fnref:ab" class="reversefootnote">&#8617;</a></p>
    </li>
  </ol>
</div>