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: 02844bee98871bf03cf435441ba23556ad4fc6aa
original commit: fa7516efa7bee58b2a7307e504ed97fc3bc69731
original commit: 47a210c15c63ba9677852269447bd2f2598b51fe