I have asked a question today at math.SE. I got a nice answer in the comments by Marco. He changed his comment to an answer, and explained the general idea, but not the special case to answer my question.
I edited his question to show the concrete answer to my question.
Most surprisingly, the edit was rejected.
In my opinion, this edit made sense, and with this edit I would accept the answer. Thus I believe that the two users who rejected it have not been careful enough.
Am I right in making such an edit, or is the rejection correct? If such edits are fine, please tell me how I can not improve the answer of Marco? Thank you