ref: 2c27f80bb5f4d8084f1d8cf9d01c4377dba92c2f 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