iPython notebooks appear as their underlying json format in differential. Code review in this format is rather difficult as there is a bunch of meta data and formatting.
Would it be possible to view notebook code in human readable format for differential reviews?
I'm going to merge this into T5698. That isn't quite the same task, but would be the first step toward this.
We haven't seen other interest in this and very limited interest in other types of "review a rendered version of a document", so I expect it will be a very long time before we pursue this.