Fix issue #672: ent_iob_ was a string, not unicode, due to missing unicode_literals statement.
Fix issue #672: ent_iob_ was a string, not unicode, due to missing unicode_literals statement.

aikramer2/spaCy,oroszgy/spaCy.hu,oroszgy/spaCy.hu,raphael0202/spaCy,banglakit/spaCy,aikramer2/spaCy,aikramer2/spaCy,oroszgy/spaCy.hu,aikramer2/spaCy,aikramer2/spaCy,explosion/spaCy,banglakit/spaCy,Gregory-Howard/spaCy,banglakit/spaCy,banglakit/spaCy,oroszgy/spaCy.hu,recognai/spaCy,explosion/spaCy,Gregory-Howard/spaCy,honnibal/spaCy,raphael0202/spaCy,Gregory-Howard/spaCy,recognai/spaCy,spacy-io/spaCy,explosion/spaCy,oroszgy/spaCy.hu,recognai/spaCy,banglakit/spaCy,aikramer2/spaCy,raphael0202/spaCy,spacy-io/spaCy,Gregory-Howard/spaCy,Gregory-Howard/spaCy,explosion/spaCy,explosion/spaCy,raphael0202/spaCy,recognai/spaCy,banglakit/spaCy,spacy-io/spaCy,raphael0202/spaCy,honnibal/spaCy,honnibal/spaCy,recognai/spaCy,spacy-io/spaCy,Gregory-Howard/spaCy,honnibal/spaCy,recognai/spaCy,explosion/spaCy,raphael0202/spaCy,spacy-io/spaCy,spacy-io/spaCy,oroszgy/spaCy.hu