fix string representation of rnn layer (#10457)
fix string representation of rnn layer (#10457)


navrasio/mxnet,reminisce/mxnet,yajiedesign/mxnet,apache/incubator-mxnet,rahul003/mxnet,TuSimple/mxnet,yajiedesign/mxnet,zhreshold/mxnet,zhreshold/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,indhub/mxnet,TuSimple/mxnet,indhub/mxnet,luoyetx/mxnet,jamesliu/mxnet,rahul003/mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,larroy/mxnet,larroy/mxnet,szha/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,reminisce/mxnet,ptrendx/mxnet,fullfanta/mxnet,mbaijal/incubator-mxnet,leezu/mxnet,fullfanta/mxnet,reminisce/mxnet,zhreshold/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,TuSimple/mxnet,dmlc/mxnet,precedenceguo/mxnet,ForkedReposBak/mxnet,tlby/mxnet,larroy/mxnet,fullfanta/mxnet,sxjscience/mxnet,leezu/mxnet,apache/incubator-mxnet,mbaijal/incubator-mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,precedenceguo/mxnet,CodingCat/mxnet,luoyetx/mxnet,navrasio/mxnet,precedenceguo/mxnet,sxjscience/mxnet,ptrendx/mxnet,TuSimple/mxnet,dmlc/mxnet,CodingCat/mxnet,CodingCat/mxnet,jamesliu/mxnet,sxjscience/mxnet,navrasio/mxnet,ForkedReposBak/mxnet,luoyetx/mxnet,szha/mxnet,fullfanta/mxnet,navrasio/mxnet,tlby/mxnet,rahul003/mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,reminisce/mxnet,yajiedesign/mxnet,ptrendx/mxnet,luoyetx/mxnet,leezu/mxnet,szha/mxnet,tlby/mxnet,leezu/mxnet,zhreshold/mxnet,TuSimple/mxnet,ptrendx/mxnet,zhreshold/mxnet,indhub/mxnet,rahul003/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,indhub/mxnet,szha/mxnet,szha/mxnet,CodingCat/mxnet,ForkedReposBak/mxnet,luoyetx/mxnet,larroy/mxnet,reminisce/mxnet,larroy/mxnet,tlby/mxnet,navrasio/mxnet,eric-haibin-lin/mxnet,fullfanta/mxnet,dmlc/mxnet,rahul003/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,leezu/mxnet,CodingCat/mxnet,jamesliu/mxnet,luoyetx/mxnet,precedenceguo/mxnet,precedenceguo/mxnet,ptrendx/mxnet,zhreshold/mxnet,rahul003/mxnet,dmlc/mxnet,indhub/mxnet,sxjscience/mxnet,ptrendx/mxnet,szha/mxnet,indhub/mxnet,DickJC123/mxnet,navrasio/mxnet,zhreshold/mxnet,fullfanta/mxnet,tlby/mxnet,navrasio/mxnet,TuSimple/mxnet,reminisce/mxnet,CodingCat/mxnet,mbaijal/incubator-mxnet,apache/incubator-mxnet,jamesliu/mxnet,sxjscience/mxnet,reminisce/mxnet,leezu/mxnet,jamesliu/mxnet,dmlc/mxnet,tlby/mxnet,ptrendx/mxnet,indhub/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,TuSimple/mxnet,luoyetx/mxnet,tlby/mxnet,sxjscience/mxnet,CodingCat/mxnet,dmlc/mxnet,zhreshold/mxnet,luoyetx/mxnet,fullfanta/mxnet,fullfanta/mxnet,rahul003/mxnet,ptrendx/mxnet,yajiedesign/mxnet,rahul003/mxnet,ForkedReposBak/mxnet,eric-haibin-lin/mxnet,leezu/mxnet,leezu/mxnet,szha/mxnet,navrasio/mxnet,TuSimple/mxnet,eric-haibin-lin/mxnet,TuSimple/mxnet,DickJC123/mxnet,szha/mxnet,indhub/mxnet,larroy/mxnet,zhreshold/mxnet,mbaijal/incubator-mxnet,luoyetx/mxnet,apache/incubator-mxnet,ForkedReposBak/mxnet,reminisce/mxnet,eric-haibin-lin/mxnet,ptrendx/mxnet,eric-haibin-lin/mxnet,tlby/mxnet,tlby/mxnet,ForkedReposBak/mxnet,larroy/mxnet,leezu/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,fullfanta/mxnet,dmlc/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,DickJC123/mxnet,jamesliu/mxnet,ptrendx/mxnet,CodingCat/mxnet,precedenceguo/mxnet,DickJC123/mxnet,szha/mxnet,jamesliu/mxnet,reminisce/mxnet,dmlc/mxnet,larroy/mxnet,indhub/mxnet,tlby/mxnet,jamesliu/mxnet,jamesliu/mxnet,sxjscience/mxnet,precedenceguo/mxnet,TuSimple/mxnet,mbaijal/incubator-mxnet,CodingCat/mxnet,navrasio/mxnet,sxjscience/mxnet