== should format at rule scroll-timeline ==
@scroll-timeline scroll-in-document-timeline {
  source: auto;
  orientation: vertical;
  scroll-offsets: 0%, 100%;
}

@scroll-timeline progressbar-timeline { }

[expect]
@scroll-timeline scroll-in-document-timeline {
    source: auto;
    orientation: vertical;
    scroll-offsets: 0%, 100%;
}

@scroll-timeline progressbar-timeline {}