Quirks mode is indeed ASCII case-insensitive.
Quirks mode is indeed ASCII case-insensitive.

See https://dvcs.w3.org/hg/csswg/rev/2c3f78d97b93

disjukr/rust-cssparser,frewsxcv/rust-cssparser,frewsxcv/rust-cssparser,tempbottle/rust-cssparser,notriddle/rust-cssparser,disjukr/rust-cssparser,servo/rust-cssparser,metajack/rust-cssparser,tempbottle/rust-cssparser,servo/rust-cssparser,notriddle/rust-cssparser,metajack/rust-cssparser