added newline before class definition (PEP8)
added newline before class definition (PEP8)

piskvorky/gensim,gojomo/gensim,summanlp/gensim,RaRe-Technologies/gensim,macks22/gensim,mattilyra/gensim,markroxor/gensim,gojomo/gensim,piskvorky/gensim,summanlp/gensim,mattilyra/gensim,markroxor/gensim,RaRe-Technologies/gensim,gojomo/gensim,RaRe-Technologies/gensim,ELind77/gensim,ELind77/gensim,piskvorky/gensim,ELind77/gensim,macks22/gensim,mattilyra/gensim,macks22/gensim,markroxor/gensim,RaRe-Technologies/gensim,gojomo/gensim,summanlp/gensim