From 444cd6f71abda2ff707f3b984c25bfcdbb5115bd Mon Sep 17 00:00:00 2001
From: knu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 31 Jul 2013 06:02:07 +0000
Subject: Add a reference to the related issue.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42266 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ChangeLog b/ChangeLog
index 2209e92576..05c5dc2bcd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 Wed Jul 31 14:41:36 2013  Akinori MUSHA  <knu@iDaemons.org>
 
 	* lib/set.rb: [DOC] Add a couple of notes on Hash as storage.
+	  ref. [Feature #6589]
 
 Wed Jul 31 14:38:52 2013  Akinori MUSHA  <knu@iDaemons.org>
 
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