Remove extra bracket in completed-docs rule config example (#1873)
Remove extra bracket in completed-docs rule config example (#1873)


JoshuaKGoldberg/tslint,berickson1/tslint,andy-hanson/tslint,palantir/tslint,andy-ms/tslint,andy-ms/tslint,JoshuaKGoldberg/tslint,andy-ms/tslint,nchen63/tslint,JoshuaKGoldberg/tslint,YuichiNukiyama/tslint,RyanCavanaugh/tslint,palantir/tslint,andy-hanson/tslint,mprobst/tslint,RyanCavanaugh/tslint,berickson1/tslint,IllusionMH/tslint,YuichiNukiyama/tslint,mprobst/tslint,andy-hanson/tslint,nchen63/tslint,RyanCavanaugh/tslint,YuichiNukiyama/tslint,IllusionMH/tslint,berickson1/tslint,palantir/tslint,mprobst/tslint,IllusionMH/tslint,nchen63/tslint