don't use assertIn; not supported in py2.6
don't use assertIn; not supported in py2.6

RDFLib/rdflib,yingerj/rdflib,marma/rdflib,ssssam/rdflib,dbs/rdflib,dbs/rdflib,armandobs14/rdflib,dbs/rdflib,dbs/rdflib,RDFLib/rdflib,yingerj/rdflib,yingerj/rdflib,ssssam/rdflib,ssssam/rdflib,marma/rdflib,avorio/rdflib,RDFLib/rdflib,avorio/rdflib,armandobs14/rdflib,marma/rdflib,yingerj/rdflib,armandobs14/rdflib,ssssam/rdflib,RDFLib/rdflib,avorio/rdflib,marma/rdflib,avorio/rdflib,armandobs14/rdflib