Replaces characters in a string with a specified set of characters
(vl-string-translate source-set dest-set str)
The value of str after any substitutions have been made
_$ (vl-string-translate "abcABC" "123123" "A is a, B is b, C is C")
"1 is 1, 2 is 2, 3 is 3"
_$ (vl-string-translate "abc" "123" "A is a, B is b, C is C")
"A is 1, B is 2, C is 3"