ref: 7e935fc4a7e5cdcd55180f6ec4821c8848c30b0e 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