> Developers should be required to submit _clean_ PRs, that is, PR's whose git history has been organized and refactored in such a way that it removed "clean up

> Developers should be required to submit _clean_ PRs, that is, PR's whose git history has been organized and refactored in such a way that it removed "clean up commits", "typo fix", etc. The only way I've ever seen this accomplished is through Github squash and merge.