ref: 6440e9bb365a29f2a7062f8bdf8dd3d5b8229cf1 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