Note: this command is modified since v1.82b3, to be able to change
delimiter, as a result, default delimiter changed from "," to " ".
Example: if delimiter is still default " ",
#forall {monster devil {mighty knight} target} {kill %0}
will be same as: kill monster;kill devil;kill mighty knight;kill target
#delim {,}
#forall {a,b,c c,d} {#show %0}
will show "a", "b", "c c" and "d".