ref: 5927f8f8d3b4ab40d2aacfae4b3cbd593c5e7f01 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