Add test for "20 DATA GOTO 10" (should be negative)

Anything in a DATA statement is not a token and should not be
considered a jump target.

samples/JUMPTEST.DO

@@ -1,3 +1,11 @@
+1 ' Test for m100-jumps.lex which 
+2 ' emits all lines which are targets
+3 ' of GOTO or similar commands.
+4 ' Line numbers <500 should be printed.                  >= 500 should not.
+5 ' 
+6 ' When testing m100-decommenter, 
+7 ' lines 500--1000 will be removed.
+8 '
 10 REM ERL Equals
 20 REM ERL Less than
 30 REM ERL Less than or equal to
@@ -8,11 +16,18 @@
 80 REM Less than or equal to ERL
 90 REM Greater than ERL
 100 REM Greater than or equal to ERL
-110 REM 110-
-120 REM 120-130
-130 REM 120-130
-140 REM -140
+110 REM LLIST 110-
+120 REM       120-130
+130 REM       120-130
+140 REM       -140
 150 REM ALL CATS ARE GREY
+160 REM RUN 160
+170 REM GOSUB 170
+180 REM ON A GO TO 1,2,3, 180, 4,5,6,7,8,9
+500 ' 
+510 REM DATA GOTO 510
+520 REM DATA "GOTO 520"
+1000 '
 1010 IF ERL =  10 THEN PRINT "Equals works"
 1020 IF ERL <  20 THEN PRINT "Less than works"
 1030 IF ERL <= 30 THEN PRINT "Less than or equal works"
@@ -28,3 +43,9 @@
 1130 LLIST -
 1140 LLIST - 140
 1150 GOTO 150
+1160 RUN 160
+1170 GOSUB 170
+1170 ON A GO TO 1,2,3, 180, 4,5,6,7,8,9
+1500 '
+1510 DATA GOTO 510
+1520 DATA "GOTO 520"