Added support for IRP, IRPC and IFN MACRO-10 pseudo-ops

apps/pdp10/tests/MACTEST.MAC.txt

@@ -14,11 +14,11 @@
 		EXP ZZ			;;WORD FULL
 		ZZ==0>			;;START AGAIN WITH 0
 	ZZ=ZZ+9+"C">			;;END OF IRPC
-	IFN ZZ,<DEFINE SHIFT		;;REMAINDER LEFT
-	 IFE ZZ&777B8,>			;;IF NOT LEFT JUSTIFIED
-	 ZZ=ZZ+9			;;MOVE LEFT 9 BITS
-	SHIFT>				;;RECURSE
-	>				;;END OF DEFINE
+	IFN ZZ,<DEFINE SHIFT<		;;REMAINDER LEFT
+	 IFE ZZ&777B8,<			;;IF NOT LEFT JUSTIFIED
+	  ZZ=ZZ+9			;;MOVE LEFT 9 BITS
+	  SHIFT>			;;RECURSE
+	 >				;;END OF DEFINE
 	SHIFT				;;START MOVING LEFT
 	EXP ZZ>				;;END OF IFN ZZ
 	>				;END OF CODE MACRO