From a39938ff44ae9e63ae04b9b2856921a44bdf2b2c Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sun, 13 Apr 2014 17:07:04 +0300
Subject: Issue #21171: Fixed undocumented filter API of the rot13 codec. Patch
 by Berker Peksag.

---
 Lib/encodings/rot_13.py | 2 +-
 Misc/NEWS               | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Lib/encodings/rot_13.py b/Lib/encodings/rot_13.py
index 1f2f47b..f0b4186 100755
--- a/Lib/encodings/rot_13.py
+++ b/Lib/encodings/rot_13.py
@@ -106,7 +106,7 @@ rot13_map.update({
 ### Filter API
 
 def rot13(infile, outfile):
-    outfile.write(infile.read().encode('rot-13'))
+    outfile.write(codecs.encode(infile.read(), 'rot-13'))
 
 if __name__ == '__main__':
     import sys
diff --git a/Misc/NEWS b/Misc/NEWS
index d4c0696..f381c93 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -27,6 +27,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #21171: Fixed undocumented filter API of the rot13 codec.
+  Patch by Berker Peksag.
+
 - Issue #21172: isinstance check relaxed from dict to collections.Mapping.
 
 - Issue #21155: asyncio.EventLoop.create_unix_server() now raises a ValueError
-- 
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