Split from T44616, diffs of the removal of trailing newlines should work, even though such diffs are rare. Example diff: https://test.wikipedia.org/w/index.php?title=Some_page_title&diff=prev&oldid=152897.
This diff should show that the page went from #REDIRECT [[Foo]]\n\n to #REDIRECT [[Foo]]\n. Instead, it pretends as though there were no changes to the wikitext of the page at all! This is incorrect diff behavior.