In coordination with Ingo Schwarze from OpenBSD, the col(1) utility has been cleaned up and updated to identify both of those SUSv2-type escape-digit and BSD-style escape-regulate-char sequences in the enter stream. The checknr(1) utility has been cleaned up and prolonged to help contemporary roff(7) macros, like synchronizing code from NetBSD and the Heirloom doctools model. FreeBSD head.