Why would I add a line break when I don't want or need a line break? It's a list item, not a text paragraph.
I define the layout and spacing in CSS for the li element.
I don't think I've ever noticed this as prevalent or common. If at all then as a strange outlier.
If it's a list item with line breaks, sure. But the linked diff adds it at the end of the li with no content following. And it does so on the previous li. Leading to a line diff on a to this unrelated item.