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+Tue Sep 23 08:25:56 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* hash.c (env_aset): allow nil value to remove an entry.
+	  [ruby-dev:36465]
+
 Tue Sep 23 08:07:07 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* misc/ruby-mode.el (ruby-keyword-end-re): emacs21 support.  a