+(defun pcomplete-pare-list (l r)
+ "Destructively remove from list L all elements matching any in list R.
+Test is done using `equal'."
+ (while (and l (and r (member (car l) r)))
+ (setq l (cdr l)))
+ (let ((m l))
+ (while m
+ (while (and (cdr m)
+ (and r (member (cadr m) r)))
+ (setcdr m (cddr m)))
+ (setq m (cdr m))))
+ l)
+