ref: 46d314b6a9301cf48b66a9e1a6db16a1a0f22fce 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