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by chipotle_coyote 2168 days ago
It's something that exists in macOS, but as far as I know applications have to explicitly choose to use it. Most applications that support it have a "File > Revert To > Browse All Versions..." command available. BBEdit -- as often the case -- has a more useful variant of it, which brings up a diff window with "Search > Find Differences > Compare Against Previous Version". (It actually lets you choose any recorded previous version.)