fix by helin and wuyi's comments
fix by helin and wuyi's comments

chengduoZH/Paddle,jacquesqiao/Paddle,pengli09/Paddle,yu239/Paddle,PaddlePaddle/Paddle,reyoung/Paddle,Canpio/Paddle,luotao1/Paddle,putcn/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,luotao1/Paddle,Canpio/Paddle,lispc/Paddle,lispc/Paddle,hedaoyuan/Paddle,Canpio/Paddle,yu239/Paddle,luotao1/Paddle,chengduoZH/Paddle,QiJune/Paddle,hedaoyuan/Paddle,putcn/Paddle,lispc/Paddle,pengli09/Paddle,yu239/Paddle,lispc/Paddle,luotao1/Paddle,putcn/Paddle,jacquesqiao/Paddle,pengli09/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,pengli09/Paddle,reyoung/Paddle,pkuyym/Paddle,lcy-seso/Paddle,baidu/Paddle,putcn/Paddle,lispc/Paddle,lcy-seso/Paddle,lispc/Paddle,lcy-seso/Paddle,pengli09/Paddle,baidu/Paddle,reyoung/Paddle,chengduoZH/Paddle,reyoung/Paddle,putcn/Paddle,hedaoyuan/Paddle,pkuyym/Paddle,tensor-tang/Paddle,pkuyym/Paddle,chengduoZH/Paddle,yu239/Paddle,baidu/Paddle,hedaoyuan/Paddle,Canpio/Paddle,hedaoyuan/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,pkuyym/Paddle,Canpio/Paddle,pkuyym/Paddle,yu239/Paddle,lcy-seso/Paddle,luotao1/Paddle,jacquesqiao/Paddle,PaddlePaddle/Paddle,lispc/Paddle,hedaoyuan/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,pengli09/Paddle,lispc/Paddle,baidu/Paddle,yu239/Paddle,jacquesqiao/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,QiJune/Paddle,pengli09/Paddle,tensor-tang/Paddle,luotao1/Paddle,yu239/Paddle,QiJune/Paddle,baidu/Paddle,reyoung/Paddle,Canpio/Paddle,hedaoyuan/Paddle,PaddlePaddle/Paddle,QiJune/Paddle,Canpio/Paddle,Canpio/Paddle,tensor-tang/Paddle,QiJune/Paddle,jacquesqiao/Paddle,hedaoyuan/Paddle,putcn/Paddle,QiJune/Paddle,tensor-tang/Paddle,lcy-seso/Paddle,pengli09/Paddle,yu239/Paddle