REMOVE-DUPLICATES
=================

syntax: (remove-duplicates <sequence>)

        ==> <sequence>

This function removes the duplicates of a sequence. It
starts at the end of the sequence.

example:       >(setq list '(a b c b a a))
               (A B C B A A)
               >(remove-duplicates list)
               (C B A) ; starts at the end of the list