// http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#list-of-active-formatting-elements
// These functions enforce the "Noah's Ark" condition, which removes redundant mis-nested elements.
// http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#list-of-active-formatting-elements
// These functions enforce the "Noah's Ark" condition, which removes redundant mis-nested elements.