'Prevent recurrence of a bug in the html5lib treebuilder.'

def test_multiple_copies_of_a_tag(self):

    content = '<!DOCTYPE    html>\n<html>\n    <body>\n            <article    id="a"    >\n            <div><a    href="1"></div>\n            <footer>\n                    <a    href="2"></a>\n            </footer>\n        </article>\n        </body>\n</html>\n'
    soup = self.soup(content)
    self.assertConnectedness(soup.article)
