Oops, sorry about that! Thanks for the catch; I'd checked the wiki and taginfo before as usual but saw very low usage (only a few hundred hits) of the correct tag and none of my many validators flagged the incorrect one, so I didn't realize I'd made a mistake and not entered it correctly the first time, which then propagated to the others.

I've fixed it in changeset 155850997 https://www.openstreetmap.org/changeset/155850997