ref: d7c4bac9357a6d5e3dfd691434f8d9a47d79f0dc 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