Allow '-' char in name of typeface name.

Current filter translates "invalid" characters in a typeface (font) name to ' ', restricting "valid" chars to alpha-numeric+space, only; but '-' is a common typeface name. In particular, TypeKit generates names with '-'s. This change allows '-'s.

A more complete solution. Sorry, still learning how to make changes to repos that I don't have access to, or I would have done this "properly," before.