mark/pkg/mark/testdata/links.html

<p>Use <a href="https://example.com">https://example.com</a></p>

<p>Use <ac:rich-text-body>aaa</ac:rich-text-body></p>

<p>Use footnotes link <sup class="footnote-ref" id="fnref:1"><a href="#fn:1">1</a></sup></p>

<div class="footnotes">

<hr />

<ol>
<li id="fn:1">a footnote link</li>
</ol>

</div>