[XeTeX] Smart quotes in Leopard

[Arthur Reutenauer]

> Not really needed on the Mac:
> alt (AKA option) key + 2 = “
> alt/option + shift + 2 = ”
> alt/option + # = ‘
> alt/option + shift + # = ’

  This is only valid with a German keyboard layout, and François---who, I
guess, might be using a French keyboard---would have a slightly different
layout if he used a Mac (Alt (+ Shift) + " and Alt (+ Shift) + ').  If
you use an American keyboard, it is yet different as I explained in an
earlier mail.

	Arthur