Is it considered too invasive to edit someone else's answer to include some links to the suggestions they have already made.
I'm specifically talking about this answer. I was quite interested in the question myself and this user gave and answer referring to some course material freely available from MIT. I looked it up and found the material he is talking about. I could now edit his post to include the links, but I'm not sure if there's any rules of etiquette I should follow? Should I make it clear that some one else made the edit so I don't infer that he is suggesting these links in case they turn out to be rubbish.
I could of course just add them as a comment, but there's quite a few links, and comments don't provide any way to format links very well.
It's been 15 minutes since he made an edit, so it's probably not something he's still finishing off.