* 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
* 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