Hopefully [ this will work.
Hopefully this[will work.
Hopefully this will[work.
Hopefully this will work.
Curses. Could some helpful mods delete this thread and the other two? I don’t want to clutter up ATMB.
I figured out the super-rad secret of your other two posts, but I’ve just gotta know, what were you testing with this post?
Ahh, just noticed the hidden square brackets. I’m guessing you wanted the preview to say “hopefully this will work” just once, but the tags to hide those brackets interfered with their l33tness or something.
Have I just given away your special super secret?
Yes, damn you! 
Seriously though, it’s just something I noticed had happened in another thread due to a typo, and I wondered what exactly makes it work. I think it’s the colour tags that stopped it working - the open bracket being next to an alphanumeric character is fine, but against punctuation or other brackets it won’t. It deletes everything from going on the preview between the open bracket and the next tagged word, but continues as normal after that, unless you put in another open bracket.