docs: improve doctests for ndarray instances in stats/base/ndarray/dcumin
#31546
| Job | Run time |
|---|---|
| 2m 35s | |
| 2m 35s |
stats/base/ndarray/dcumin
#31546
| Job | Run time |
|---|---|
| 2m 35s | |
| 2m 35s |