Without the extra comma, adding something to the list requires going back to the "clean => ...." line and adding a comma, and then adding the new thing on the next line.

In addition to that, it also means that the diff between revisions in your VCS (which you of course use, whichever one you use) ends up having that extra -/+ pair of lines just to add the comma, which makes it that much slower to scan visually.

In reply to Re^2: strange comma by fullermd
in thread strange comma by xiaoyafeng

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