Glad you asked.
EDIT
Use the raw post button.
Older answer that is inferior to the above answer.
The URL for one of the earlier post is
https://swi-prolog.discourse.group/t/forum-formatting-references-markup-etc/2286/2
There is an alternative URL format that will reveal the raw text as entered.
https://swi-prolog.discourse.group/raw/2286/2
Older answer that is inferior to the above answer.
The solution is to have your trust level bumped up which I just did.
But that will only work with pages that are wiki, e.g. this
Try it now.
The other option is to use the developer mode of most Internet browsers by pressing F12 and then using the inspect option.