ref: 5a48547528a4b9bbe31dfc3a99f6b39ff7d8c34e 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