Problem Statement
When iterating over a revision history in a Django template, there doesn't appear to be a method to get the delta between revisions.

Describe the solution you'd like
From any revision, I would like to get the difference of that revision and the previous revision, while iterating over the revisions in a Django template.

Describe alternatives you've considered
I've considered writing a custom view that provides history diffing or perhaps extending the History base model with a get_prev_record_diff method.