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I was doing some reviewing on Stack Overflow and saw one question that had a serious (wrong) spelling edit.
I wanted to reject it straight away, but I wanted to correct it first, since the original question wasn't OK either, so I clicked "Improve" instead.
However, it turned out this was an audit question; I was admonished that I should have rejected it and not edit!
I understand, but what if (as it was the case) I wanted to improve and uncheck the 'helpful' button instead?