Compare and print test dimensions in points, not millimeters
Compare and print test dimensions in points, not millimeters

As much as I prefer the metric system, a PDF's MediaBox is in points,
so this makes it easier to correlate with the actual file.

Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/547>

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg