Fixed MACRO-10 literal processing (literals need to be evaluated as early as possible, but not allocated until the end is reached)

apps/pdp10/tests/macro10/LITNEST.MAC.txt

@@ -0,0 +1,16 @@
+; From the MACRO-10 ASSEMBLER PROGRAMMER'S REFERENCE MANUAL (April 1978), p. 2-8:
+
+P=0
+T1=1
+T2=2
+
+GETCHR:	ILDB T2,T1		;Get a character
+	CAIN T2,0		;Is it a null?
+	JRST [MOVE T1,TXTPTR#	;Yes, retrieve pointer
+		ILDB T2,T1	;Get a new character
+		CAIN T2,"?"	;Is it a question mark?
+		JRST [MOVE T1,TXTPT1#	;Yes, get alternate pointer
+			ILDB T2,T1	;Get the message character
+			JRST GETHLP#]	;Go to help routine
+		POPJ P,]	;Not question mark, return
+	POPJ P,			;Not a null, return

apps/pdp10/tests/macro10/README.md

@@ -7,7 +7,7 @@ machines:
     type: pdp10
     config: /devices/pdp10/machine/ka10/test/debugger/machine.xml
     debugger: true
-    commands: a 100 /apps/pdp10/tests/macro10/TEXT.MAC
+    commands: a 100 /apps/pdp10/tests/macro10/LITNEST.MAC
 ---
 
 PDPjs MACRO-10 Mini-Assembler Tests

apps/pdp10/tests/macro10/TEXT.MAC.txt

@@ -1,4 +1,4 @@
-; From the MACR0-10 ASSEMBLER PROGRAMMER'S REFERENCE MANUAL (June 1972):
+; From the MACRO-10 ASSEMBLER PROGRAMMER'S REFERENCE MANUAL (June 1972), p. 7-9:
 ;
 ;	Example 4 (Figure 7-4) shows nested macros which use IRPC.  The desired operation
 ;	is to take an ASCII text string and store the characters four per word, left-justified,