Yes, indeed, you are right that this changes the behaviour. Overall, I agree it is actually better this way, and, when I checked whether I should change the `__doc__`, found that this is actually more consistent with what I wrote there quite a while back.... I also noticed that there were no test cases for the copy behaviour yet (I guess this was at a time I had not yet been trained properly! I know add test cases in absolutely everything I do, also outside of astropy).  That is now corrected, including some tests with an `ndarray` as input.