Minor style fixes in Partition rule.
Minor style fixes in Partition rule.

zuyu/incubator-quickstep,UWQuickstep/quickstep,hbdeshmukh/incubator-quickstep,UWQuickstep/quickstep,jianqiao/incubator-quickstep,jianqiao/incubator-quickstep,hbdeshmukh/incubator-quickstep,hbdeshmukh/incubator-quickstep,jianqiao/incubator-quickstep,UWQuickstep/quickstep,hbdeshmukh/incubator-quickstep,UWQuickstep/quickstep,zuyu/incubator-quickstep,UWQuickstep/quickstep,jianqiao/incubator-quickstep,zuyu/incubator-quickstep,zuyu/incubator-quickstep