I would put that mistake on the same level as "typo" and hope that it would be missed or ignored, if it can't be corrected. It's a deeply unimportant error that in no way hinders the understanding of the message.
True, but that's not a forum post, that's a document that aims to change policy and as such it pays off to put your best foot forward so the GP has absolutely done the right thing in calling that one out so it could be fixed.
I agree with you (and fnordfnordfnord), but I was under the impression that this is a duplicate of a document already sent, in which case what was sent can't be retracted and edited. I certainly didn't mean to come across as critical of pointing out the typo.