Lokaltog/powerline-fontpatcher — pull request #6 by kballard (2014-08-14 05:49:23+00:00)
Title: Support .ttc files

When processing a .ttc file with multiple embedded fonts, it patches all
of them and generates a new .ttc. Presumably the added symbols won't
look right in the non-Regular variants, but it's better than omitting
them.

This has not been tested on non-TTC fonts. I assume that they'll only
contain one font, which means they'll behave as expected.