ref: 063b2a4e134589a8a1d635708eb0eb39d5a76bfb 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