Originally posted by ChessPraxisWell... strictly speaking it's a swung dash. It's only a real tilde when it's used as a diacritic on, e.g. an n or a n o. The ones in ASCII are supposed to be in the centre of the letter heigth, and the ones in Phlab's posting do turn up there, not at above-letter height. So they're swung dashes.
It's a tilde.
http://en.wikipedia.org/wiki/Tilde
Yes, ASCII got this wrong.
Richard