ref: 2c4eeb399845785a1dc317e4f2e3cb3c3c7c5370 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