akr	2010-07-18 08:33:16 +0900 (Sun, 18 Jul 2010)

  New Revision: 28674

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=28674

  Log:
    update doc.

  Modified files:
    trunk/encoding.c

Index: encoding.c
===================================================================
--- encoding.c	(revision 28673)
+++ encoding.c	(revision 28674)
@@ -1322,6 +1322,7 @@
  *   Encoding.locale_charmap -> string
  *
  * Returns the locale charmap name.
+ * It returns nil if no appropriate information.
  *
  *   Debian GNU/Linux
  *     LANG=C

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