Unflatten the extension configs when creating the markdown.Markdown instance.
Unflatten the extension configs when creating the markdown.Markdown instance.

--HG--
branch : feature-inversion-of-configuration

snoozbuster/markdoc,wlonk/markdoc,wlonk/markdoc,lrem/phdoc,lrem/phdoc,zacharyvoase/markdoc,snoozbuster/markdoc