#
diff -u -N context.txt context.txt
--- context.txt	2007-06-27 08:50:46.000000603 -0400
+++ context.txt	2007-07-11 17:24:45.000000000 -0400
@@ -10,5 +10,5 @@
-[A]
-[B]
+[A1]
+[B1]
 [c]
 [d]
 [Xe]