ref: 6e4bf0cdecce71d9a839c1e7f6a42409c2f9d961 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