--- a.txt       2007-10-15 22:38:51.000000000 +0100
+++ b.txt       2007-10-15 22:41:38.000000000 +0100
@@ -1,6 +1,8 @@
-Hello, World!
--------------
+Hello, Universe!
+================

 Some interesting stuff to read. Some interesting stuff to read. Some
 interesting stuff to read. Some interesting stuff to read. Some interesting
 stuff to read. Some interesting stuff to read.
+
+Some really crazy ideas about ruling the world and conquering the Universe.