DOC: numpy.ma.expand_dims examples are not properly documented

[jsaladich]

Issue with current documentation:

Hi!

I was checking how object np.newaxis behaves when I use a MaskedArray (like np.ma.is_masked() returns True).
The official documentation example in here is showing numpy.ma.expand_dims with normal ndarrays. While the old one here describes the example with MaskedArrays, solving my doubt. Shouldn't be the official documentation updated?

Just to make sure, if I use np.newaxis I assume that the mask of my array will be always respected, am I correct?

Thanks a lot for your help and the amazing job with Numpy!

Idea or request for content:

No response

[rajveer43]

@jsaladich Would liek to work on this