ref: 9186d1ce9b8e6bd1443d6c2e24f378dedbaa5a30 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