It doesn't matter, but couldn't help but notice that the honorable form feed (U+000C) was missing from the definition given. https://infra.spec.whatwg.org/#asci

It doesn't matter, but couldn't help but notice that the honorable form feed (U+000C) was missing from the definition given. https://infra.spec.whatwg.org/#ascii-whitespace https://infra.spec.whatwg.org/#ascii-whitespace is the concept used in the HTML parser. (https://html.spec.whatwg.org/multipage/parsing.html https://html.spec.whatwg.org/multipage/parsing.html)