I read over SRFI 140 again, and was surprised to notice this time that there are no string->istring and string->mstring conversions. String-repeat with a count of 1 can accomplish the first, and string-copy can accomplish the second, but they aren't exactly obvious.
John Cowan http://vrici.lojban.org/~cowanxxxxxx@ccil.org They tried to pierce your heart with a Morgul-knife that remains in the wound. If they had succeeded, you would become a wraith under the domination of the Dark Lord. --Gandalf