-;;; REPLACE cannot default end arguments to the length of sequence since it
-;;; is not an error to supply nil for their values. We must test for ends
-;;; being nil in the body of the function.
+;;; REPLACE cannot default END arguments to the length of SEQUENCE since it
+;;; is not an error to supply NIL for their values. We must test for ENDs
+;;; being NIL in the body of the function.