[NiLuJe]

Which, in your examples, happen to fall just right when there's a bit of extra layout-provided vertical space (title, blockquotes), but not with only paragraphs, where it might be missing a very few pixels.

The usual process involves decreasing/increasing the *top* margin (increasing it will shift content to the bottom, balancing the top/bottom white space, while decreasing it might be enough to free enough space to squeeze that last line in) until you find something that works okay. And/or play with font sizes & line height.

That said, the fact that it behaved differently with a negative margin prooobably means we can lie to CRe. Which could arguably be construed as a bug, because it really shouldn't render to a larger buffer than the screen's ^^. I'll have to look into it one of these days.