sorted(out.items())  # doctest: +NORMALIZE_WHITESPACE
        [('border-bottom-color', 'blue'),
         ('border-left-color', 'red'),
         ('border-right-color', 'red'),
         ('border-top-color', 'blue'),
         ('font-family', 'serif'),
         ('font-size', '24pt'),
         ('font-weight', 'bold')]
        )Ú
isinstancer