In the question how do I echo $something >> file.txt without carriage return? which was asked and answered about a month ago, a new answer has been submitted which is essentially a duplicate (but stripped down) of a previous answer.

Is there a default policy as to what to do with it? Should I just downvote the duplicate answer? Or should I flag it? I looked at the options for flagging, but didn't see a specific option for "answer is a duplicate", but wasn't sure if it qualified as "other".