In another case I would have agreed with this rejection.
However in this specific case, the image posted by the OP shows the actual code that is used by the OP. And obviously the OP missed the first line when he was typing out the question.
So what the editor did was adding the missing line to make it consistent with the image. In other words, the editor made the code in the post consistent with the actual code that the OP has. So I think this suggested edit is correct (despite the misplaced code comment).
The gotcha is that this fact isn't immediately obvious to the reviewers. So it would seem to them as if the editor was trying to add (his own) code to the question which is not acceptable.
To prevent such misunderstanding, always include relevant information in the edit comment (not as a comment in the code). For example, in this case
Added a line to make the code consistent with the actual code that the OP has (see the screenshot posted in the question: http://i.stack.imgur.com/vNsyq.jpg)
So you did the right thing. But arguably you could've done better by removing the code comment and put in a proper edit comment as described above.
Note: to my limited knowledge, there's no way to get a suggested edit reviewed again after it was rejected, short of asking the editor to re-submit a new suggested edit.