Completed port to use list2set for managing SPARQL variable binding results
Completed port to use list2set for managing SPARQL variable binding results

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