There is an ongoing [effort to standardise Markdown][sm]; I think it would be nice to check whether this implementation is compliant with it.

[sm]: http://standardmarkdown.com/

http://standardmarkdown.com/

> IkiWiki's [[plugins/mdwn]] plugin does not contain an implementation
> of Markdown: it relies on external libraries. It can currently use
> any of these, most-preferred first:
>
> * [[!cpan Text::MultiMarkdown]], only if explicitly requested via
>   `$config{multimarkdown}`
> * [[!cpan Text::Markdown::Discount]], if not explicitly disabled
>   via `$config{nodiscount}`
> * [[!cpan Text::Markdown]]
> * [[!cpan Markdown]]
> * `/usr/bin/markdown`
>
> In practice, Discount is the implementation pulled in by the
> Debian package dependencies, and (I suspect) the most
> commonly used with IkiWiki.
>
> If the selected external library (whatever it happens to be)
> complies with a particular interpretation of Markdown, then
> IkiWiki will too. If not, it won't. The only influence
> IkiWiki has over its level of compliance with a particular
> interpretation is in how we choose which external library
> we prefer.
>
> As such, if you want IkiWiki to change its interpretation of
> Markdown, the way to do that is to either change Discount's
> interpretation of Markdown, or contribute a patch to make
> `mdwn.pm` prefer a different (and presumably "more compliant")
> Markdown implementation.
>
> IkiWiki has one syntax extension beyond Markdown, which is
> that text enclosed in double-square-brackets is an IkiWiki
> [[ikiwiki/wikilink]] or [[ikiwiki/directive]]. This applies
> to any markup language used with IkiWiki, not just Markdown.
>
> (There also doesn't seem to be any consensus that labelling
> any particular fork of Markdown as "standard" can make it the 
> truth, or that this particular fork is the Correct™ fork and not
> just <https://xkcd.com/927/>; but that's between the authors of
> Markdown implementations and those who want to standardize
> Markdown, and it isn't IkiWiki's job to police that.)
>
> --[[smcv]]