License header (#13178)
License header (#13178)

* Minor fix to license_header documentation

* Handle UnicodeError when checking license

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