Fix #20897: Make Nothing ⋔ Nothing, as per spec.
#4710
| Job | Run time |
|---|---|
| 1m 6s | |
| 1m 6s |
Nothing ⋔ Nothing, as per spec.
#4710
| Job | Run time |
|---|---|
| 1m 6s | |
| 1m 6s |