When lines run long and the final word or words run over the edge, and PBS squeezed them underneath the line, I've been coding this as a sublinear addition. I notice that in e1 at least, coders have decided to make the run-off word[s] a separate line, and join the two lines with a milestone tag. I would argue that the run-off words are not really a new line -- Neil uses spacings which suggest such words are in between lines rather than constituting new ones. What say you?