Make html parser tests actually test html.
Make html parser tests actually test html.

sferik/libxml-ruby,increments/libxml-ruby,increments/libxml-ruby,xml4r/libxml-ruby,sferik/libxml-ruby,xml4r/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby,increments/libxml-ruby,xml4r/libxml-ruby,sferik/libxml-ruby