add entry for unused kwargs in create_statefbk_iosystem · python-control/python-control@10bcd65

Original file line number	Diff line number	Diff line change
`@@ -158,6 +158,7 @@ def test_matplotlib_kwargs(function, nsysargs, moreargs, kwargs, mplcleanup):`
`158`	`158`	`kwarg_unittest = {`
`159`	`159`	`'bode': test_matplotlib_kwargs,`
`160`	`160`	`'bode_plot': test_matplotlib_kwargs,`
	`161`	`+'create_statefbk_iosystem': statefbk_test.TestStatefbk.test_statefbk_iosys,`
`161`	`162`	`'describing_function_plot': test_matplotlib_kwargs,`
`162`	`163`	`'dlqe': test_unrecognized_kwargs,`
`163`	`164`	`'dlqr': test_unrecognized_kwargs,`