`PixelRegion` derives `PartialEq`, `Clone` and `Copy`, so `assert_corners!` compares one against another instead of flattening both to a tuple whose order there was nothing to check. A failure now prints two regions.
`PixelRegion` derives `PartialEq`, `Clone` and `Copy`, so `assert_corners!` compares one against another instead of flattening both to a tuple whose order there was nothing to check. A failure now prints two regions.