I encountered an answer which was basically just a link to another external source. It was an old question asked some 2 years back. The answer in discussion is this one.
I added the relevant details from the link to here. In this case, the details could fit in here which is why I went ahead and added the relevant details to the answer itself.
So, the question basically is, what should I do if I encounter a link only answer that has occured in the past? Should I just add the relevant details as I did this time or flag it for moderator attention?