So, when looking as an edit review for a thing I posted I noticed this line:
Community has approved 545 edit suggestions and rejected 123 edit suggestions and improved 1 edit suggestion
This is referring to the Community bot account that's used to help out in various automatic ways around the site. While I'm a little surprised that it rejects edits, I'm even more surprised that it edits and then approves them. How can it do this and what is that 'improved edit suggestion' that it has?