I have noticed a handful of questions were the answer has been posted as a comment to the question. An example would be here -> Recording custom variables to identify individual users with Google Analytics
Whilst the asker has gotten what they want it would be nice to be able to close off the question with one answer - Not only will it make it easier for people finding the question in the future to see the accepted answer straight away, but it would improve the stats for the site.
Is the correct way forward for the person who notices it to create the answer (crediting the commenter in the answer) or should it be ignored or should something else happen?