I’ve just discovered this while messing with my profile’s summary! (＾▽＾)
I don’t know where to post this, so I’ll just leave it here.
Edit: It keeps converting it into image uploads, so that’s a big F in the chat, although since you can’t upload images in your profile summary, it keeps it intact!
Basically, you can use HTML to format posts, your summary page, anything you can use the Discourse text editor to put in the DevForum (any pro HTML programmer out here? 
)
For example, let’s use the <img> tag! I’ll be using the Lua logo from Wikipedia:(https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Lua-Logo.svg/1200px-Lua-Logo.svg.png)
As you can see, you can also use attributes (such as width). How about we align it in the center using the <div> tag with the align attribute?
You can also make it redirect with the <a> tag:
You can also make it with Markdown, but it is quite tricky:
(I used it for my summary before discovering this)
I haven’t tested all tags and attributes, but they should all work!
I hope someone is reading this and shares the word so we can see some very cool formatted posts and profiles in the forum! ☆*:.｡.o(≧▽≦)o.｡.:*☆