Fix invalid ttl output for test 0198 in xhtml5

Author: rubensworks

test-cases/rdfa1.1/xhtml5/0198.ttl

@@ -4,5 +4,5 @@
 
 <http://www.example.org/me#mark> a foaf:Person;
    foaf:firstName "Mark";
-   foaf:name "<span property=\"foaf:firstName\">Mark</span> <span property=\"foaf:surname\">Birbeck</span><span xmlns=\"http://www.w3.org/1999/xhtml\" property=\"foaf:firstName\">Mark</span><span xmlns=\"http://www.w3.org/1999/xhtml\" property=\"foaf:surname\">Birbeck</span>"^^rdf:XMLLiteral;
+   foaf:name "<span property=\"foaf:firstName\" xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:foaf=\"http://xmlns.com/foaf/0.1/\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\">Mark</span> <span property=\"foaf:surname\" xmlns=\"http://www.w3.org/1999/xhtml\" xmlns:foaf=\"http://xmlns.com/foaf/0.1/\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\">Birbeck</span>"^^rdf:XMLLiteral;
    foaf:surname "Birbeck" .