ref: 41dfa1df58c7e398a68e9c2b6f6f745b7b3f0b2b 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