From ca4ac03d38d71c7d2ffa27937dff76079fbc6397 Mon Sep 17 00:00:00 2001
From: Glenn Morris <rgm@gnu.org>
Date: Mon, 26 Jan 2009 02:48:23 +0000
Subject: [PATCH] Add an introductory comment.

---
 etc/BABYL | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/etc/BABYL b/etc/BABYL
index 987d1283aba..441d6771697 100644
--- a/etc/BABYL
+++ b/etc/BABYL
@@ -1,5 +1,8 @@
 Format of Version 5 Babyl Files:
 
+(Babyl was the storage format used by Rmail before Emacs 23.1.
+Since then it uses mbox format.)
+
 Warning:
 
     This was written Tuesday, 12 April 1983 (by Eugene Ciccarelli),
-- 
2.39.2