ref: b2d29ed0eebd0e3e2c162b5e83d6d0e8b6ddee57 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