The diff function is responsible for representing the before and after changes of an audit entry in the UI.

As part of auditing the GH connection removal, I need to make some changes to diff as it does not appear to support a use-case where there is before data but no after data.

While looking at the implementation, I noticed that there were some edge cases which I ran into that I thought might affect future work around audits.

The work for this issue will try to smooth out some of the wrinkles while also adding in some new functionality to support auditing the deletion of GH connections.