;;; Dispatch to the appropriate function to attempt to convert a call.
;;; REF must be a reference to a FUNCTIONAL. This is called in IR1
-;;; optimize as well as in local call analysis. If the call is is
+;;; optimization as well as in local call analysis. If the call is is
;;; already :LOCAL, we do nothing. If the call is already scheduled
;;; for deletion, also do nothing (in addition to saving time, this
;;; also avoids some problems with optimizing collections of functions