pub fn marked(
paragraph: &Element,
range: Range<usize>,
mark: Mark,
styles: &Styles,
) -> Option<bool>Expand description
Whether the characters of a range carry a mark: Some when all of them
say the same, None when they differ. A range of no characters answers
for the character before it, or after it at the paragraph’s start, which
is the one text typed there takes its formatting from; a paragraph with no
characters answers for itself.