In coordination with Ingo Schwarze from OpenBSD, the col(1) utility has been cleaned up and up to date to realize both of those SUSv2-type escape-digit and BSD-design and style escape-management-char sequences in the input stream. The checknr(1) utility has been cleaned up and prolonged to assist modern day roff(7) macros, like synchronizing code from NetBSD and the Heirloom doctools model. FreeBSD head.