Added ‘fill’ kwarg to int.to_string()

int.to_string() now accepts a fill argument. This allows you to pad the string representation of the integer with leading zeroes:

n = 4
message(n.to_string())
message(n.to_string(fill: 3))

n = -4
message(n.to_string(fill: 3))

OUTPUT:

4
004
-04