io.c: ARGF.file returns $stdin instead of STDIN [ci skip]

For example:
`ruby -e '$stdin=open(IO::NULL);p [STDIN,$stdin,ARGF.file]'`
prints `[#<IO:<STDIN>>, #<File:/dev/null>, #<File:/dev/null>]`

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58288 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index bd21e9460e..40b758c340 100644
--- a/io.c
+++ b/io.c
@@ -11988,7 +11988,7 @@ argf_filename_getter(ID id, VALUE *var)
  *     ARGF.file  -> IO or File object
  *
  *  Returns the current file as an +IO+ or +File+ object.
- *  <code>#<IO:<STDIN>></code> is returned when the current file is STDIN.
+ *  <code>$stdin</code> is returned when the current file is STDIN.
  *
  *  For example:
  *