ref: 4a1f9034d1e1c0f21a9c677c0b04b61aea3d3121 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