Test Markdown with original renderer and new renderer
In particular, footnote ids will get rendered differently.
Footnote1
```ruby
Footnote[^test]
[^test]: a test footnote
```
Original
<section class="footnotes">
<ol>
<li id="fn1-286">
<p data-sourcepos="9:10-9:24">a test footnote <a href="#fnref1-286" class="footnote-backref"><gl-emoji title="leftwards arrow with hook" data-name="leftwards_arrow_with_hook" data-unicode-version="1.1">↩</gl-emoji></a></p>
</li>
</ol>
</section>
With use_cmark_renderer
enabled
<section class="footnotes" data-footnotes="">
<ol>
<li id="fn-test-7144">
<p data-sourcepos="5:10-5:24">a test footnote <a href="#fnref-test-7144" aria-label="Back to content" class="footnote-backref" data-footnote-backref=""><gl-emoji title="leftwards arrow with hook" data-name="leftwards_arrow_with_hook" data-unicode-version="1.1">↩</gl-emoji></a></p>
</li>
</ol>
</section>
-
a test footnote
↩