akr	2010-04-24 15:05:34 +0900 (Sat, 24 Apr 2010)

  New Revision: 27471

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=27471

  Log:
    update document.

  Modified files:
    trunk/io.c

Index: io.c
===================================================================
--- io.c	(revision 27470)
+++ io.c	(revision 27471)
@@ -2098,7 +2098,7 @@
  *  The <i>length</i> bytes string means it doesn't meet EOF.
  *
  *  If <i>length</i> is omitted or is <code>nil</code>,
- *  it reads until EOF.
+ *  it reads until EOF and the encoding conversion is applied.
  *  It returns a string even if EOF is met at beginning.
  *
  *  If <i>length</i> is zero, it returns <code>""</code>.

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