Editor sometimes display "received too many columns" warnings

[gdementen]

Especially frequent during compare(). Even though the issue is harmless, it confuses users.

>>> compare(arr1, arr2)
WARNING: received too many columns (4 > 2)!
WARNING: received too many columns (4 > 2)!

There are two distinct issues here:

• that warning should go to the logger (which is/should not be visible to end users) instead of using print(). Priority very high.
• there is an underlying issue in at least compare() (and possibly elsewhere) which is causing this unexpected column number.

[gdementen]

For compare, it only triggers a warning for arrays with 3 dimensions or more.

>>> arr1 = ndtest((2, 3, 4))
>>> arr2 = arr1 + 1
>>> compare(arr1, arr2)

triggers a warning...

but

>>> arr1 = ndtest((2, 3))  # or ndtest(2)
>>> arr2 = arr1 + 1
>>> compare(arr1, arr2)

does not