ref: 7c4d2abbe14d3d0e9d2f5872e0964677c5dc783d 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