Identical content editor are collapsed

[fcollonval]

From jupyterlab-git example, single cell added or unchanged have their content collapse as identical. We should not collapse the content in such case.

There is also the case of the notebook metadata. But the issue is larger as the collapse widget title is wrong by announcing there is a change even when there is none. And in addition, it displays 4 editors even if there are no changes.

[fcollonval]

#719 solved the first part - the part about the notebook metadata still needs fixing.

[vidartf]

BTW: When doing a comparison between stable / RC, I notice the stable also lists metadata as having changes, even when there are none, so this might not be a regression (the metadata bit)? Rather, the full collapse just highlights the issue more clearly?

[fcollonval]

this might not be a regression (the metadata bit)?

Yes this is not a regression. But it will definitely be interesting for the user to know if the metadata have changed or not.

Rather, the full collapse just highlights the issue more clearly?

Yes indeed.