ref: 0b0fb103248ec7b12b3a2b94d88b1fe7a0b4403e 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