ref: 58a13c39b7f3e6ab0bf950908e98b9f0dfb7c951 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