ref: ad4d1397fb08b0d205e623f9a7c74fa19afb1c8c 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