DOC: Fix bincount in docstring.
DOC: Fix bincount in docstring.

humdings/zipline,quantopian/zipline,Scapogo/zipline,umuzungu/zipline,quantopian/zipline,alphaBenj/zipline,enigmampc/catalyst,humdings/zipline,enigmampc/catalyst,wilsonkichoi/zipline,Scapogo/zipline,alphaBenj/zipline,bartosh/zipline,umuzungu/zipline,magne-max/zipline-ja,florentchandelier/zipline,magne-max/zipline-ja,bartosh/zipline,florentchandelier/zipline,wilsonkichoi/zipline