Currently, the auto-text for a review comment for a link-only answer reads
While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
I think that this might be improved by linking to Your answer is in another castle: when is an answer not an answer?, so that further education is reachable if the poster so wishes.
Proposed change:
While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. (See here for more information)
I just manually edited this into a comment on Mi Yodeya -- I'd love for this to happen automatically! :)