And the ruby regex newline vulnerability that featured in one of the later XSS levels was also present in an earlier level, but wasn't necessary for the intende

And the ruby regex newline vulnerability that featured in one of the later XSS levels was also present in an earlier level, but wasn't necessary for the intended vector, so I wondered if it was an unintentional oversight, or left as an alternate exploit, or just a red-herring? (being intentionally vague so as not to spoil it for anyone...)