Continuing the discussion from Did you know… (about Discourse):
No, actually it adds the code thingie at the top of your post, and does not look once at the code you have posted and highlighted.
Maybe it works if you’ve only got code, but it breaks if you typed regular text first. This is consistently not working.
It appears the three backticks only works for one-liners: trying to do it for a block of code gives you a grey-highlighted space and then normal code.