Correctly render markdown in the formatting help

[PragTob]

This is what I originally set out to do :D

While posting today I noticed that the markdown formatting help wouldn't render correctly:

So I fixed that:

No tests added as there weren't already any acceptance or template tests and it seemed overkill to set them up for just this :)

[rrrene]

This is what I originally set out to do :D

Chapeau :wink:

Thanks for your work on this, I really appreaciate it! :+1: