python2.5 PyArg_ParseTuple fix Python 2.5 doesn't like it when we mix str objects and the "t#" format in PyArg_ParseTuple. Change it to use "s#". Tested with python 2.3, 2.4 and 2.5.

#!/usr/bin/env python
#

import doctest

import mercurial.changelog
# test doctest from changelog

doctest.testmod(mercurial.changelog)