support sparql-directives, withouth @ and trailing .
support sparql-directives, withouth @ and trailing .

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