3 commits

Author	SHA1	Message	Date
Max Brunsfeld	b94fa3ed35	Clarify character set specs	2014-02-06 12:58:00 -08:00
Max Brunsfeld	e8337a3c70	Fix errors in computing character set unions	2014-02-06 09:12:03 -08:00
Max Brunsfeld	d3d25f2683	Represent character sets as sets of character ranges	2014-02-05 18:56:04 -08:00