def log_addition(self, request, object, change_message=None):
        change_message = change_message or _("Initial version.")
        if self.revision_context_manager.is_active():
            self.revision_context_manager.set_comment(change_message)
        try:
            super(VersionAdmin, self).log_addition(request, object, change_message)
        except __HOLE__:  # Django < 1.9 pragma: no cover
            super(VersionAdmin, self).log_addition(request, object)
dataset/ETHPy150Open etianen/django-reversion/src/reversion/admin.py/VersionAdmin.log_addition