<p>"See so-and-so's comment" doesn't meet the standard for an answer on our site. Answers should be complete in themselves; for example, if BruceET was to delete his comment, your answer would be useless.</p>

<p>It is usually seen as acceptable to </p>

<ul>
<li><p>invite the author of the comment to post as an answer, if you feel it is a complete answer to the question, or</p></li>
<li><p>to simply post the information in the comment as an answer yourself, expanding on it where necessary to make it a suitable answer (comments are usually overly brief for answers), as long as you credit the source (and as long as the answer doesn't duplicate other answers on site)</p></li>
</ul>

<p>You already tried the first. That was well done. The next step would be to try the second thing. </p>

<p>Edit: I don't see it as absolutely necessary to mark the answer as community wiki (per gung's answer) - some people do it to signal that they're not trying to gain reputation from someone else's information, which is a fine and admirable choice but I think there's no real problem with getting the reputation if you follow the ordinary standards of decent behavior (which I feel you already covered more than sufficiently by inviting the commenter to post an answer); if you happen to subsequently get an upvote or two by turning your question into a properly answered one, good luck to you.</p>
