ref: 34a0fe0d51a0bf0679d2d3b4c09140c8447dac2c 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