diff -r d83797ef0d2d -r 546d78f0d81f src/Pure/Concurrent/simple_thread.scala
--- a/src/Pure/Concurrent/simple_thread.scala	Mon Nov 28 22:05:32 2011 +0100
+++ b/src/Pure/Concurrent/simple_thread.scala	Mon Nov 28 22:18:19 2011 +0100
@@ -1,4 +1,5 @@
 /*  Title:      Pure/Concurrent/simple_thread.scala
+    Module:     Library
     Author:     Makarius
 
 Simplified thread operations.