;;; :OFFSET SB-Offset
;;; Force the temporary to be allocated in the specified SC
;;; with the specified offset. Offset is evaluated at
-;;; macroexpand time. If Offset is emitted, the register
+;;; macroexpand time. If Offset is omitted, the register
;;; allocator chooses a free location in SC. If both SC and
;;; Offset are omitted, then the temporary is packed according
;;; to its primitive type.
;;; Similar to the argument/result option, this specifies the
;;; start and end of the temporaries' lives. The defaults are
;;; :LOAD and :SAVE, i.e. the duration of the VOP. The other
-;;; intervening phases are :ARGUMENT,:EVAL and :RESULT.
+;;; intervening phases are :ARGUMENT, :EVAL and :RESULT.
;;; Non-zero sub-phases can be specified by a list, e.g. by
;;; default the second argument's life ends at (:ARGUMENT 1).
;;;