Update spacy/training/corpus.py
Update spacy/training/corpus.py

Co-authored-by: Sofie Van Landeghem <4da0510fc9ac6504702ef47a8b3fc3d8fc7be21b@users.noreply.github.com>
explosion/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,honnibal/spaCy,honnibal/spaCy,honnibal/spaCy,explosion/spaCy,explosion/spaCy,explosion/spaCy