substring-move!

[procedure] substring-move! str1 start1 end1 str2 start2''

Guile: Copy the substring of str1 between start1 and end1 into str2 beginning at start2.

The same function can be achieved by SRFI-13's string-copy!, but the different API:

  (string-copy! str2 start2 str1 start1 end1)