I recently reviewed a suggested edit on Java DB constraint which simply added a tag to a question. The comment was "added derby tag based on comment", which surely made sense to the editor, but to check whether the edit was appropriate I had to visit the question in a new window to see the comments. Would it be reasonable to show the comments on questions and answers in the reviews for suggested edits?
A possible problem with this is that the comments justifying the edit may not make sense if the comments on which they were based are later deleted.