Fixed a minor typo in the TriX writer's #write_term() method.
Fixed a minor typo in the TriX writer's #write_term() method.

bxshi/librdf,dirvine/librdf,datagraph/librdf,bxshi/librdf,dirvine/librdf,bxshi/librdf,datagraph/librdf,datagraph/librdf,dirvine/librdf