;;; FIXME: Doing this is slightly flaky (since we can't do it right
;;; without all the headaches of true code walking), and it shouldn't
;;; be necessary with modern Python anyway, as long as POLICY-QUALITY
-;;; is properly DEFKNOWNed to have no side-effects so that it can be
+;;; is properly DEFKNOWNed to have no side effects so that it can be
;;; optimized away if unused. So this should probably go away.
(defun policy-qualities-used-by (expr)
(let ((result nil))