'The L{repr} of a L{Headers} instance shows the names and values of all
the headers it contains.'

def test_repr(self):

    foo = 'foo'
    bar = 'bar'
    baz = 'baz'
    self.assertEqual(repr(Headers({foo: [bar, baz]})), ('Headers({%r:    [%r,    %r]})' % (foo, bar, baz)))
