[DOC] Compose and deep learning classifier doc tidy

[TonyBagnall]

fixes the docstring references and a couple of formatting issues in these packages

[MatthewMiddlehurst]

Difficult to tell as these aren't on the webpage, but just from the docstring these look like an improvement.

Could possibly add defaults to some of the parameters, i.e.

estimators : list of tuples
        List of (name, estimator, column(s)) tuples specifying the transformer
        objects to be applied to subsets of the data.

does not currently display its default.

[TonyBagnall]

Difficult to tell as these aren't on the webpage, but just from the docstring these look like an improvement.

Could possibly add defaults to some of the parameters, i.e.

estimators : list of tuples
        List of (name, estimator, column(s)) tuples specifying the transformer
        objects to be applied to subsets of the data.

does not currently display its default.

It doesnt actually have a default, it seems to be a required parameter. I dont want to change the structure of this here

[TonyBagnall]

@achieveordie @AurumnPegasus are these changes ok with you?

[MatthewMiddlehurst]

Oh, yes, it's the column ensemble so it requires estimators as a parameter. All good.

[TonyBagnall]

ah sorry, meant to wait to hear from @achieveordie @AurumnPegasus, please revert if necessary (I am doing something with the tests so didnt want to clash with #3761)

[achieveordie]

All changes definitely improve the documentation. Seems like I was late only by a small margin :)

[TonyBagnall]

thanks, not at all late, I was too hasty!

[AurumnPegasus]

I see it has been merged, but yes, the changes look good to me!