Fixed issue with incorrect indefinite name when no antecedent is found.

Fixed issue with the word ISN'T being output incorrectly in a message.

src/shrdlu/newans.83

@@ -1073,7 +1073,7 @@ TEST-LOOP
 (DEFUN NOTELL NIL 
        (GLOBAL-ERR THAT
 		   ISN
-		   'T
+		   /'T
 		   THE
 		   KIND
 		   OF
@@ -1093,7 +1093,9 @@ TEST-LOOP
        ;;SINGLE "SAY" PHRASE.  "PHRASE" IS A FREE VARIABLE IN
        ;;LISTNAMES
        (PROG (ANS OLD NEW) 
-	     (AND (EQUAL PHRASE '(NIL))
+	     (AND (or 
+                   (EQUAL PHRASE '(NIL))
+                   (equal phrase nil))
 		  (SETQ PHRASE (CAR ITEM))
 		  (RETURN ITEM))
 	     (SETQ OLD (REVERSE PHRASE))