docs: improve doctests for complex number instances in math/base/special/cflipsign
#27307
| Job | Run time |
|---|---|
| 1m 20s | |
| 1m 20s |
math/base/special/cflipsign
#27307
| Job | Run time |
|---|---|
| 1m 20s | |
| 1m 20s |