ref: 3360bf0e88b086b0c7f7957eeb4a6f0b4eaeebc7 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