ref: 2c0fbf27314d04cb3bb5ab1ea3f9b7bae556f89a 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