Noticed by gentoo users at https://www.linux.org.ru/forum/development/12519403?lastmod=1460752551148#comment-12519598 (warning: cyrillic glyphs are all around) Steps to reproduce: $ vim foo-new.ebuild creates EAPI=5 ebuild. EAPI=6 is expected.
I see upstream already has the change: https://github.com/gentoo/gentoo-syntax/commit/0633017890ed4e47b7e551ef430716a9cfda6973
Fixed in the tree.