> However, one good reason for replacing the dashes by spaces > (instead of completely deleting the line) is that it won't > mess up the vertical spacing, if the macro package is > designed to rely on it.
If the cut mark would be needed it would be cut away later (at the final paper output). So even if the package is designed for it it would be better not to produce it (if not needed) then to produce it invisible. So I would vote for .rm )k...
