update sample files

beautiful-racket-demo/basic-demo-2/sample.rkt

@@ -4,6 +4,6 @@
 50 print "never gets here"
 40 end
 60 print 'three' : print 1.0 + 3
-70 goto 11. + 18.5 + .5
+70 goto 11. + 18.5 + .5 rem ignored
 10 print "o" ; "n" ; "e"
 20 print : goto 60.0 : end

beautiful-racket-demo/basic-demo-2a/sample.rkt

@@ -1,9 +1,9 @@
-#lang basic-demo-2a
+#lang basic-demo
 30 rem print 'ignored'
 35
 50 print "never gets here"
 40 end
 60 print 'three' : print 1.0 + 3
-70 goto 11. + 18.5 + .5
+70 goto 11. + 18.5 + .5 rem ignored
 10 print "o" ; "n" ; "e"
 20 print : goto 60.0 : end