amclees
On line 100 of the pretty_text.rb file all plugin discourse-markdown JS files are listed to be automatically included in the server-side pretty text.
/discourse-markdown/ is the used regex.
The effect is that if plugins for markdown-it place assets in assets\javascripts\lib\markdown-it they are loaded client-side but not server-side.
If this is not intended, something like /(?:discourse-markdown|markdown-it)/ for the regex should be a fix.
Is this a bug? Should markdown-it plugins be loaded differently from discourse-markdown plugins somehow?