Handling suggested edits adding new content to answers

I have stumbled upon some Suggested Edits on answers that attempt to add new content to the answer given by the poster.

Although some of these edits (like the suggested edit on this answer… or well this edit) do add valuable content to the answer (basically they expand or enhance the answer considerably), I am not sure that they reflect the original intentions of the answerer.

What could be an appropriate way of handling such Suggested Edits?

If this were the case for Community Wiki posts I think there would be no problem, as the post is owned by Community and everyone can/should contribute to it’s enhancement. However, seeing this on answers owned by users makes me wonder if those edits should be approved or not.