Using a dash/hypen on college essay

johnnyzxz
Thu, 27 Sep 2012 03:20:54 +0000

I’ve used these quite a lot, but they only look nice on Word. once you put them in a college’s essay submission box, it looks like this:

“johnny’s face – the one with all the scars – did not look so good”
(random sentence)

should I leave it like that? or leave it at one dash (rather than two, as in this “–”)