Function display_text 

pub fn display_text(markdown: &str) -> String

The text of a markdown fragment as the agenda shows it, with the inline markup taken off.

This is how a heading reaches Task::heading: emphasis, strong text, links and strikethrough contribute their text, and an inline code span contributes its literal. An editor holding the raw line can therefore compare what the file says against what it was handed — parse_heading_line says where the title starts, and this says what it looks like once extracted.

let line = "# TODO **Отчёт** за июль";
let heading = parse_heading_line(line).expect("a heading");
assert_eq!(display_text(&line[heading.title_start..]), "Отчёт за июль");