The diff view in pull requests is very powerful already, allowing to view individual commits, as well as "all changes" and "changes since last reviewed". In some cases, however, it would be useful to have the ability to see a diff between arbitrary commits in a PR.

This is already possible by setting a URL like:

…/pull-requests/<id>/commits/<hash1>?since=<hash2>

Manually setting this URL is a bit cumbersome though. Ideally, there would be support for getting this function from the UI.

Suggestion: Allow to use SHIFT-click in the commits list, to see the diff between any two commits in this list.