Earlier quoted context omitted.
I see. Just gave it a try and backslash works as escape. Though also I'm probably unlikely to experience such issues myself as my Emacs theme shows formatting characters even after applying the formatting.
The following: \~300 lines Still exports as \~300 lines (in case of an HTML export). In fact you could "escape it" with any character, the backslash isn't doing anything special, the formatting just doesn't trigger if there's no white space on one side. When I use Org I also do not have auto-formatting, as you do, but the highlighting would still be wrong. And it'd be masochistic to put up with that unless you've inv…
The highlighting corrects for me once I "escape" the "~300".