purge extension doesn't need "#!/usr/bin/env python".
(from the Debian package: deb_specific__hgpurge.py.patch)
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2be3001847cb18a23c403439d9e7d0ace30804e9 0.9.1
36a957364b1b89c150f2d0e60a99befe0ee08bd3 0.9.2
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