The reviewer stats on Stack Overflow about the Community♦ user say the following:
Community has approved 351480 edit suggestions and rejected 182464 edit suggestions and improved 1492 edit suggestions
And here are the same stats on Super User:
Community has approved 9742 edit suggestions and rejected 2028 edit suggestions and improved 19 edit suggestions
As explained here, the approved edits are from when a user reviewed the edit as Improve, and the rejected edits are from when a user reviewed the edit as Reject and Edit or when the edit conflicted with a subsequent edit. But how could Community improve an edit suggestion? Usually when Community edits a post it's an anonymous user who edited it, but anonymous users can't review suggested edits.
So my question is, how could Community♦ improve those edit suggestions?