Preserve AsciiDoc footnote link ids

Problem to solve

Footnote link ids are currently removed by the sanitization. Here's an example:

This paragraph has a footnote.footnote:[This is the text of the footnote.]

And here's the generated HTML before sanitization:

<div>
<div>
<p>This paragraph has a footnote.<sup class="footnote">[<a id="_footnoteref_1" href="#_footnotedef_1" title="View footnote.">1</a>]</sup></p>
</div>
</div>
<div id="footnotes">
<hr>
<div id="_footnotedef_1">
<a href="#_footnoteref_1">1</a>. This is the text of the footnote.
</div>
</div>

And here's the generated HTML after sanitization:

<div>
<p>This paragraph has a footnote.<sup>[<a href="#_footnotedef_1" title="View footnote.">1</a>]</sup></p>
</div>
<div>
<hr>
<div>
<a href="#_footnoteref_1">1</a>. This is the text of the footnote.
</div>
</div>

As you can see the link #_footnotedef_1 and #_footnoteref_1 won't be resolved anymore.

Intended users

Everyone that writes or reads AsciiDoc document on GitLab.

Proposal

Relax the sanitization to preserve the footnote link ids.

Links / references

Edited Jul 16, 2019 by Guillaume Grossetie