Fix usage example in phrases.py (#2575)
Fix usage example in phrases.py (#2575)

* Update phrases.py

* Update phrases.py

* Update phrases.py

* Fix trailing whitespace in gensim/models/phrases.py

* Update gensim/models/phrases.py

More trailing whitespace

gojomo/gensim,piskvorky/gensim,RaRe-Technologies/gensim,RaRe-Technologies/gensim,RaRe-Technologies/gensim,piskvorky/gensim,piskvorky/gensim,gojomo/gensim,gojomo/gensim,RaRe-Technologies/gensim,gojomo/gensim