ref: 1f2656eeadb7b3230f92fbdfe1f31eebc5f81a71 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