for
    proprietary internal customizations or stopgaps on missing
    standards information. If a scheme seems to be missing, please
    `file an issue`_!

    Args:
        text (unicode): Text representing the scheme.
           (the 'http' in 'http://hatnote.com')
        uses_netloc (bool): Does the scheme support specifying a
           network host? For instance, "http" does, "mailto" does
           not. Defaults to True.
        default_port (int): The default port, if any, for netloc-using
           schemes.

    .. _file an issue: https://github.com/mahmoud/hyperlink/issues

    Nz-default_port expected integer or None, not %rTFz>unexpected default port while specifying non-netloc scheme: %rz"uses_netloc expected bool, not: %r)