Isn't the correct term mirror? In any case, this is awesome. I hope the developers add a feature that lets you see removed comments, and previous edits as well. Or maybe even a "time machine" type feature. That would be cool.
I believe they're referencing the part of the comment right before they brought up time machine, where it's mentioned that they'd like to see deleted comments and an edit history.
I agree with the sentiment, users who delete their own comments should have their privacy respected. Same goes for edits.
