diff -r a89803e3d1bd -r e8d4606e6502 src/FOL/ex/Nat.thy
--- a/src/FOL/ex/Nat.thy	Fri Feb 02 12:05:24 1996 +0100
+++ b/src/FOL/ex/Nat.thy	Mon Feb 05 13:44:28 1996 +0100
@@ -1,6 +1,6 @@
-(*  Title: 	FOL/ex/nat.thy
+(*  Title:      FOL/ex/nat.thy
     ID:         $Id$
-    Author: 	Lawrence C Paulson, Cambridge University Computer Laboratory
+    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
     Copyright   1992  University of Cambridge
 
 Examples for the manual "Introduction to Isabelle"