ref: 3303b2c61b4381500b39b1d3ce6f95b9a21ed4f4 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