combineLib.combine : 'a list * 'b list -> ('a * 'b) list
Transforms a pair of lists into a list of pairs.
combine ([x1,...,xn],[y1,...,yn]) returns
[(x1,y1),...,(xn,yn)].
Fails if the two lists are of different lengths.
Has much the same effect as the SML Basis function
ListPair.zip except that it fails if the arguments are not
of equal length. Also note that zip is a curried version of
combine