From 92aee059e87f97b8ea0a56a85196109005702ffe Mon Sep 17 00:00:00 2001
From: gsinclair <gsinclair@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 26 Jul 2003 12:53:09 +0000
Subject: Added credit to PragProg

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4173 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/observer.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'lib/observer.rb')

diff --git a/lib/observer.rb b/lib/observer.rb
index 0e3570ace1..64c7d81351 100644
--- a/lib/observer.rb
+++ b/lib/observer.rb
@@ -1,5 +1,7 @@
 #
-# observer.rb implements the _Observer_ object-oriented design pattern.
+# observer.rb implements the _Observer_ object-oriented design pattern.  The
+# following documentation is copied, with modifications, from "Programming
+# Ruby", by Hunt and Thomas; http://www.rubycentral.com/book/lib_patterns.html.
 #
 # == About
 #
-- 
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