I have found a question where the accepted answer is correct, but out-of-date. A newer answer gives a better solution for more recent versions of the library. I am neither the asker nor the answerer, but I thought it might help people like me if I edit the accepted answer with something along the lines of "Since version xxx, you can do this: [new answer]; The original solution for previous verions is [old answer]", as I have seen done on other questions.

What is the etiquette here? I think it would be valuable to copy the newer answer into the accepted answer (obviously citing the user responsible) but I am also aware the user will not gain reputation for their answer as a result. Or, could I edit the question say something along the lines of "See xxxx's answer below since version xxx"?

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    Do you have full edit rights? If not, leave a comment first? – rene Mar 23 '19 at 12:40
  • @rene Yes, I have full edit rights. But I've never edited someone else's answer before! – devrobf Mar 23 '19 at 13:01
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    Perhaps leave a comment and hope the original answerer does the decent thing and edits it him/herself. Of course that only works if they are still active on the site. – mdewey Mar 23 '19 at 13:32
  • Will do. Seems like edits I've seen on other questions are not the preferred approach! – devrobf Mar 23 '19 at 15:59

Please don't - while the ideal is to have the selected answer to be correct, we rarely edit the answers of others and make significant changes. The intent of the person who posted the elected answer, and the work of the person who posted the better answer is not respected.

Rather - I'd suggest leaving a comment below the selected answer "If you're running version 11.01 of foo you might want to take a look at the answer of user 1234 - which works better". Include a link of course. Upvote the better answer, and you've done all you should be doing.

An exception would be community wikis - which are posts which are shared by the community. They're less common but in many cases, meta FAQs would count as such.

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    The exception to this is meta FAQs, whose top answers should be edited with new information in case the system or community consensus changes. This is because FAQs are intended as documentation, and having incorrect or consensus-contradicting information in them can be bad. – Sonic the Stay-Home Hedgehog Mar 23 '19 at 22:07

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