Copying the list as I replied to Branden only by accident a few minutes ago.
This should be the latest version of Werner's underlining macro: https://lists.gnu.org/archive/html/groff/2010-08/msg00017.html IIRC it still has problems when output goes across multiple lines (becomes continuous underline including margin and spacing from second line going forward) and with underlining punctuation after the argument (workarounds force an extra space). I can confirm tomorrow. I ended up preferring using the basic drawing method in the Groff manual due to the punctuation issue. Best, Dan
