ref: 47faa09b2507bdfb2e3dd983f9aeb1ab54b2f2ef 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