fails:Array#last returns the last count elements if given a count
fails:Array#last returns an empty array when passed a count on an empty array
fails:Array#last returns an empty array when count == 0
fails:Array#last returns an array containing the last element when passed count == 1
fails:Array#last returns the entire array when count > length
fails:Array#last returns an array which is independent to the original when passed count
fails:Array#last tries to convert the passed argument to an Integer usinig #to_int
fails:Array#last raises a TypeError if the passed argument is not numeric
fails:Array#last does not return subclass instance on Array subclasses
fails:Array#last is not destructive
