XML-serializers now use double-quotes for xmlns declarations (like the regular attributes).
XML-serializers now use double-quotes for xmlns declarations (like the regular attributes).

git-svn-id: 60eb48102d1ca0c284ab3654bef916b01e1b221b@1707 4f84a9ca-5c3e-0410-8a68-0bdf370325d5

nwebs/rdflib