Fix Sphinx errors in box_nms (#13261)
Fix Sphinx errors in box_nms (#13261)


leezu/mxnet,ForkedReposBak/mxnet,tlby/mxnet,tlby/mxnet,szha/mxnet,larroy/mxnet,DickJC123/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,apache/incubator-mxnet,ForkedReposBak/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,tlby/mxnet,tlby/mxnet,tlby/mxnet,reminisce/mxnet,larroy/mxnet,yajiedesign/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,apache/incubator-mxnet,eric-haibin-lin/mxnet,reminisce/mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,ptrendx/mxnet,reminisce/mxnet,szha/mxnet,ptrendx/mxnet,leezu/mxnet,ForkedReposBak/mxnet,tlby/mxnet,larroy/mxnet,yajiedesign/mxnet,zhreshold/mxnet,sxjscience/mxnet,leezu/mxnet,larroy/mxnet,reminisce/mxnet,zhreshold/mxnet,szha/mxnet,zhreshold/mxnet,ptrendx/mxnet,larroy/mxnet,reminisce/mxnet,ptrendx/mxnet,szha/mxnet,DickJC123/mxnet,leezu/mxnet,dmlc/mxnet,DickJC123/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,sxjscience/mxnet,szha/mxnet,dmlc/mxnet,reminisce/mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,zhreshold/mxnet,dmlc/mxnet,szha/mxnet,leezu/mxnet,zhreshold/mxnet,sxjscience/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,zhreshold/mxnet,tlby/mxnet,szha/mxnet,leezu/mxnet,yajiedesign/mxnet,ptrendx/mxnet,ptrendx/mxnet,dmlc/mxnet,larroy/mxnet,tlby/mxnet,szha/mxnet,ptrendx/mxnet,reminisce/mxnet,yajiedesign/mxnet,tlby/mxnet,zhreshold/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,dmlc/mxnet,sxjscience/mxnet,tlby/mxnet,dmlc/mxnet,yajiedesign/mxnet,sxjscience/mxnet,leezu/mxnet,ForkedReposBak/mxnet,eric-haibin-lin/mxnet,reminisce/mxnet,apache/incubator-mxnet,apache/incubator-mxnet,szha/mxnet,yajiedesign/mxnet,ptrendx/mxnet,ptrendx/mxnet,yajiedesign/mxnet,dmlc/mxnet,reminisce/mxnet,sxjscience/mxnet,reminisce/mxnet,zhreshold/mxnet,leezu/mxnet,ForkedReposBak/mxnet,DickJC123/mxnet