ref: 2cccc2b8dcb96674c1e3f7bf956e9a7a05d60df0 dir: /test/data/stdsort-expected/
0 1 2 3 4 5 6 7 8 9 --- 1 2 3 4 5 6 7 8 9 10 --- C Cc a aa b cC d f fuckit go