Espionage beware that there are many wiki syntax out there, and dokuwiki is one of them… There's a plugin to use the standard wikicreole however.
gour as replied by michaelsy there are plenty kind of markdown, and I think the plugin you mentioned use commonmark
Regarding ViM it knows wikicreole and I think mediawiki too, but by default with extension wiki
instead of txt
as used by Dokuwiki. (you need then to manually change the syntax and it would be fine) This editor's plugin named vimwiki also come with it's own wiki syntax. When I'll have some spare times, it will be good to write a syntax plugin for dokuwiki 😉