1fn finish(self) -> Vec<HLSpan> {
2    let mut spans = Vec::new();
3    let mut start = 0;
4    while start < self.bytes.len() {
5        let Some((_, kind)) = self.bytes[start] else {
6            start += 1;
7            continue;
8        };
9        let mut end = start + 1;
10        while self
11            .bytes
12            .get(end)
13            .is_some_and(|paint| paint.is_some_and(|(_, next)| next ==
14        {
15            end += 1;
16        }
17        spans.push(HLSpan::new(start..end, kind));
18        start = end;