Index: io.c
===================================================================
--- io.c	(revision 20448)
+++ io.c	(working copy)
@@ -2688,14 +2688,14 @@
 
 /*
  *  call-seq:
- *     ios.getc   => fixnum or nil
+ *     ios.getc   => string or nil
  *
  *  Reads a one-character string from <em>ios</em>. Returns
  *  <code>nil</code> if called at end of file.
  *
  *     f = File.new("testfile")
- *     f.getc   #=> "8"
- *     f.getc   #=> "1"
+ *     f.getc   #=> "h"
+ *     f.getc   #=> "e"
  */
 
 static VALUE
@@ -2720,8 +2720,8 @@
  *  <code>EOFError</code> on end of file.
  *
  *     f = File.new("testfile")
- *     f.readchar   #=> "8"
- *     f.readchar   #=> "1"
+ *     f.readchar   #=> "h"
+ *     f.readchar   #=> "e"
  */
 
 static VALUE
Index: ext/stringio/stringio.c
===================================================================
--- ext/stringio/stringio.c	(revision 20448)
+++ ext/stringio/stringio.c	(working copy)
@@ -749,7 +749,7 @@
 
 /*
  * call-seq:
- *   strio.readchar   -> fixnum
+ *   strio.readchar   -> string
  *
  * See IO#readchar.
  */