ref: 9cb3a0f22ac95f75e87e944b95b6c5a13a4eb729 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