AT-TAIL Sets the position of a STRING! after the last position.
Categoryname
AT-TAIL value
value - STRING! type value
This method has no refinements
AT-TAIL places the current position at the tail of the STRING! type variable, just after the last position.
When processing a string one character after another, you can stop that process by placing the current position to the AT-TAIL place.
this: "this"
this: at-tail this
if is-tail this [write/line "this is at tail"]