From b3d77007f4e682c77c0c11439fc9d333a23d7f8b Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <solipsis@pitrou.net>
Date: Sun, 31 Jan 2010 23:12:29 +0000
Subject: [PATCH] r77895 broke doctest.

---
 Lib/doctest.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/doctest.py b/Lib/doctest.py
index e80e74d5cea..d6fb504eeaa 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -247,7 +247,8 @@ class _SpoofOut(StringIO):
         return result
 
     def truncate(self, size=None):
-        StringIO.truncate(self, size)
+        self.seek(size)
+        StringIO.truncate(self)
 
 # Worst-case linear-time ellipsis matching.
 def _ellipsis_match(want, got):