* incorporate https://github.com/k2-fsa/icefall/pull/1269 * incorporate https://github.com/k2-fsa/icefall/pull/1301 * black formatted * incorporate https://github.com/k2-fsa/icefall/pull/1162 * black formatted
Co-authored-by: Yifan Yang <yifanyeung@qq.com> Co-authored-by: yfy62 <yfy62@d3-hpc-sjtu-test-005.cm.cluster>