Replaces: https://github.com/go-gitea/gitea/pull/22947 Fixes https://github.com/go-gitea/gitea/issues/22946 Probably related to https://github.com/go-gitea/gitea/issues/19530 Basically, many of the diffs were broken because they were comparing to the base commit, where a 3-dot diff should be comparing to the [last common ancestor](https://matthew-brett.github.io/pydagogue/git_diff_dots.html). This should have an integration test so that we don’t run into this issue again. --------- Co-authored-by: Jonathan Tran <jonnytran@gmail.com>
