DOCS: Minor (but build breaking) docstring fix
DOCS: Minor (but build breaking) docstring fix

humdings/zipline,enigmampc/catalyst,alphaBenj/zipline,florentchandelier/zipline,humdings/zipline,Scapogo/zipline,bartosh/zipline,florentchandelier/zipline,quantopian/zipline,bartosh/zipline,Scapogo/zipline,alphaBenj/zipline,quantopian/zipline,enigmampc/catalyst