Notebook diff

[brichet]

As far as I know, there is currently no way to display diff on a whole Notebook, only the diff on each cell independently.

We should probably think of a way to compare two Notebook contents, with the diff cell by cell, but also the cell added and removed.

We could probably use the cell ID to know if the cell has been added,deleted or updated.

In this case, the originalSource and newSource could be the cells array of the notebook content.

[jtpio]

Make sense.

At some point maybe it would make sense to share some bits with https://github.com/jupyter/nbdime, or have nbdime depend on jupyterlab-diff.