Failing tests
PunktSentenceTokenizer: accept the realign_boundaries in the span_tokenize method
and handle correctly sentences like "(Sent1. ) Sent2.": Should be tokenized ['(Sent1. )', 'Sent2.'], not ['Sent1.)', 'Sent2.']
Merge pull request #653 from arthurdarcet/develop

PunktSentenceTokenizer: accept the realign_boundaries argument in the span_tokenize method