ref: 0c475a0c82f93c48c82e95bf52fb5a3fe59a96c1 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