docs: improve doctests for ndarray instances in blas/ext/base/ndarray/dcusumkbn2
#50045
| Job | Run time |
|---|---|
| 6s | |
| 6s |
blas/ext/base/ndarray/dcusumkbn2
#50045
| Job | Run time |
|---|---|
| 6s | |
| 6s |