How to post an empty comment?

Something got highlighted for me. I copy pasted into a browser and it said “no results.”

press alt key and dont let it go, and then type 255 and then release alt key..this is the only way Ik!

press alt key and dont let it go, and then type 255 and then release alt key..this is the only way Ik!
No, it does not work
I know there is a invisible character which can be posted and commented, but when we highlight it gets highlighted, but this is not the case.(#21)

Link to comment: https://www.chess.com/forum/view/general/why-a-1200-fide-will-be-the-level-of-magnus-carlsen-at-some-point?page=2