Someone commented below the above answer that it was missing information regarding the range of rovers using RTGs, so I edited that answer to include that information, thus making it more complete. The whole point of the Stack Exchange network, after all, is to encourage high-quality questions and answers, and adding more information to an answer would appear to me to be increasing its quality. For accepted answers, like this one, having as authoritative an answer as possible would appear to be most desirable.
However, the author of the answer rejected my edit, claiming in a comment that it "wasn't [their] intent". I don't understand how a factual answer can have intent, and even if it does I don't understand how that intent is in any way relevant to adding more facts to that answer.
I would appreciate an explanation as to whether this is indeed how Space.SE is curated.