ref: eadf2bcb3c9dbe20b8bef1cf7e6059703f1e5ac6 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