For the first time, Facebook is letting users edit their posts after the fact. The change will be available to some people on the web and the Android mobile app later today; an iOS version is supposed to follow soon after. Like many of Facebook's new features, this is a gradual rollout, so don't be surprised if it doesn't appear right away. When it does show up, the feature will let users click to edit a post, then preserve a viewable history of the changes, hopefully keeping users honest enough to use it mostly for typos and bad grammar.



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