Allow pass empty dictionary to `gensim.corpora.WikiCorpus`. Fix #2052 (#2042)
Allow pass empty dictionary to `gensim.corpora.WikiCorpus`. Fix #2052 (#2042)


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