Method remove_char_range

src/editor/document.rs:172–178

(&mut self, start: usize, end: usize)

    }

    pub fn remove_char_range(&mut self, start: usize, end: usize) {
        let start = start.min(self.len_chars());
        let end = end.min(self.len_chars());
        if start < end {
            self.rope.remove(start..end);
        }
    }

    pub fn delete_line(&mut self, line: usize) {
        if line >= self.line_count() {