Fix tfidf spec
Fix tfidf spec

mamaral/natural,NaturalNode/natural,karimsa/natural,PTaylour/natural,polymaths/natural,dpraimeyuu/natural,levy5674/natural,moos/natural,PMSI-AlignAlytics/natural,mcanthony/natural,Hugo-ter-Doest/natural,Logicify/natural,itamayo/natural,walkingdoctors/natural,ahmedshuhel/natural,kjhenner/natural