refactor: Enhance docs, remove main, add tests in `MergeSortedSingl…
#4048
| Job | Run time |
|---|---|
| 3m 3s | |
| 3m 3s |
main, add tests in `MergeSortedSingl…
#4048
| Job | Run time |
|---|---|
| 3m 3s | |
| 3m 3s |