'\'attachment\', two comma-separated instances of the header field.
As Content-Disposition doesn\'t use a list-style syntax, this is invalid
syntax and, according to RFC 2616, Section 4.2, roughly equivalent to
having two separate header field instances.
This is invalid, so UAs should ignore it.'

def test_attmultinstances(self, header_checker):

    header_checker.check_ignored('attachment;    filename=foo.html,    attachment;    filename=bar.html')
