ref: f6f5d7086bc67d1c68d83d6f9bad1ea037e5e6c0 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