ref: c634b3005ccd2ddfe903b1c1c7b7d61e2e8d6fb4 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