Several files rely on properly substituted subversion keywords. In
the cpython clone the keywords aren't substituted.


3.3 example:
============

$ find . -name "*.c" | xargs grep -n '"\$'
./Modules/_bsddb.c:102:static char *rcs_id = "$Id$";
./Modules/pyexpat.c:1818:    static char *rcsid = "$Revision$";
./Modules/getbuildinfo.c:28:#define SVNVERSION "$WCRANGE$$WCMODS?M:$"
./Modules/_hotshot.c:1402:    static char *rcsid = "$Revision$";
./Python/sysmodule.c:1147:static const char headurl[] = "$HeadURL$";


Python 3.3a0 (default:a69ef22b60e3, Mar  8 2011, 15:40:56) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyexpat
>>> pyexpat.__version__
'400s)'
>>> 


2.5 example:
============

Python does not build without at least changing Include/patchlevel.h
and Python/sysmodule.c.