except that combining characters are not treated correctly for line-wrapping. this addresses github issue #32 and part of issue #81. c/expeditor.c, s/expeditor.ss original commit: 87d4811781d7e9183f7710aa6a809b850a38454f
original commit: 1ada02cc4cadc6b9a7b2b2da4dd326fb0e7518f6
original commit: 47a210c15c63ba9677852269447bd2f2598b51fe