--- a/dup.rst	Wed Dec 14 14:49:07 2011 +0200
+++ b/dup.rst	Wed Dec 14 14:52:27 2011 +0200
@@ -5,6 +5,12 @@
 ==============
 .. contents::
 
+Search for duplicate lines.
+===========================
+
+  http://en.wikipedia.org/wiki/Duplicate_code
+                wiki page
+
 Search for duplicate files.
 ===========================