diff -r e25dbfce40e9 -r ebe08056c60c samples/effectivelist/src/org/apidesign/effectivelist/Listable.scala
--- a/samples/effectivelist/src/org/apidesign/effectivelist/Listable.scala	Fri Aug 31 20:16:57 2012 +0200
+++ b/samples/effectivelist/src/org/apidesign/effectivelist/Listable.scala	Sun Sep 02 22:00:13 2012 +0200
@@ -3,7 +3,9 @@
 /** A member of a {@link List} that makes keeping references
  * to previous and next items in the list effective.
  */
+// BEGIN: effectivelist.item
 trait Listable[T <: Listable[T]] {
   private[effectivelist] var prev : T = _
   private[effectivelist] var next : T = _
 }
+// END: effectivelist.item