Footnote syntax doesn't work according to Asciidoctor documentation?

[ShadowKyogre]

Hey everyone! Was testing DocGist to render some random documents I had written on an etherpad instance. It looks like that the asciidoctor version of the footnotes syntax doesn't work on DocGist. Here's the data I tested with.

Input text:: https://notes.typo3.org/p/YPlWzvj6IP
Result:: https://gist.asciidoctor.org/?epsp-notes.typo3.org-YPlWzvj6IP#_footnote_2

Asciidoctor documentation:: https://asciidoctor.org/docs/asciidoc-syntax-quick-reference/#section-footnotes

Asciidoc documentation:: http://asciidoc.org/userguide.html#X92

[mojavelinux]

The version of Asciidoctor used by docgist is woefully out of date. See #21 for the effort to get it updated.