In [6]: html5lib.serialize(html5lib.parse("<math><mi xml:lang=en xlink:href=foo /></math>"))
Out[6]: u'<math><mi href=foo lang=en></mi></math>'
We should get u'<math><mi xml:href=foo xml:lang=en></mi></math>' or similar back.
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In [6]: html5lib.serialize(html5lib.parse("<math><mi xml:lang=en xlink:href=foo /></math>")) Out[6]: u'<math><mi href=foo lang=en></mi></math>'We should get u'<math><mi xml:href=foo xml:lang=en></mi></math>' or similar back.