Index: doc/next-tutorial.txt
===================================================================
diff -u -r9d8cfca98a5da22ca842502f73d2e6195582dfee -rdc4e18f42355dbf473140da723940832c3aba2ba
--- doc/next-tutorial.txt	(.../next-tutorial.txt)	(revision 9d8cfca98a5da22ca842502f73d2e6195582dfee)
+++ doc/next-tutorial.txt	(.../next-tutorial.txt)	(revision dc4e18f42355dbf473140da723940832c3aba2ba)
@@ -345,7 +345,7 @@
 [[xmp-class-safety]]
 .Listing {counter:figure-number}: Class Safety
 {set:xmp-class-safety:Listing {figure-number}}
-[source,tcl,numbers]
+[source,tcl,numbered]
 --------------------------------------------------
 nx::Class create Safety {