Most glaringly, there is the part in https://github.com/JesseKPhillips/USA-Constitution/commit/7f... in the article talking about the President's powers, saying "The President shall have Power to [...] He shall from time to time [...]" and the diff inserts "No soldier shall, in time of peace be quartered in any house, without the consent of the owner, nor in time of war, but in a manner to be prescribed by law." between these sentences.
This doesn't work at all, not only because this amendment has nothing to do with the President's powers, but especially because the "He" starting the next sentence has nothing more to refer to.
Of course this would be a lot more boring if the amendments were just tucked on at the end, but I'm afraid reality is just boring here.