r77895 broke doctest.

0e9d4584 · Antoine Pitrou · 57408761 · 0e9d4584
Commit 0e9d4584 authored Jan 31, 2010 by Antoine Pitrou
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Lib/doctest.py Lib/doctest.py +2 -1

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--- 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):