[css3-fonts] Appendix A copyedits

http://dev.w3.org/csswg/css-fonts/#platform-props-to-css

   # underlying font formats used; they can be used

Think it would be better to split this sentence...

   #  stored for different locales but Microsoft recommends fonts

s/locales/locales,/

   # don't have this limitation, the family name is used

Run-on. Suggest s/,/—/

   # The bold face of the Gill Sans family

Prepend "For example"

   # for a given face but the Postscript name

s/face/face,/

   # to lookup a face while on Mac OS X

s/face/face,/

~fantasai