[io] Fixes a failure in test_serialization.py for BOOST 1.67
Ensures output of closing tag.  Fixes
@@ -81,9 +81,11 @@ typedef std::string bytes;
std::string xml_export()
{
std::stringstream ss;
+ {
boost::archive::xml_oarchive ar(ss);
siconos_io_register_ ## COMPONENT(ar);
ar << ::boost::serialization::make_nvp(BOOST_PP_STRINGIZE(CLASS),(*($self)));
+ }
return ss.str();
}
