minor format issues (#1341)
minor format issues (#1341)


jenniew/BigDL,luchy0120/BigDL,luchy0120/BigDL,wzhongyuan/BigDL,wzhongyuan/BigDL,zhangxiaoli73/BigDL,luchy0120/BigDL,yiheng/BigDL,i8run/BigDL-1,i8run/BigDL-1,jenniew/BigDL,qiuxin2012/BigDL,yiheng/BigDL,zhangxiaoli73/BigDL,qiuxin2012/BigDL,yiheng/BigDL,i8run/BigDL-1,zhangxiaoli73/BigDL,jenniew/BigDL,qiuxin2012/BigDL,wzhongyuan/BigDL