rename v

BUR #27844 has been rejected.

create alias v -> v_sign
create alias w -> w_sign
create alias double_v -> double_v_sign
create alias double_w -> double_w_sign

Previously discussed in: topic #19745 (and tangentially topic #21397)
I think we should finish moving away from single-letter tags.

I don't think the previous discussions fully apply here. a_(phrase) is something that requires relatively specific knowledge to know what it means, while v both both incredibly common, and also wht it's called more often than not.

I'm also not aware of any problems surrounding their usage (something I could foresee with less common tags like the aforementioend a_(phrase)), and we shouldn't be changing the tag name just for the sake of it.

This bulk update request is pending automatic rejection in 5 days.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #27844 (forum #286761) has been rejected by @DanbooruBot.