In coordination with Ingo Schwarze from OpenBSD, the col(1) utility has been cleaned up and current to understand the two SUSv2-model escape-digit and BSD-style escape-command-char sequences in the enter stream. The checknr(1) utility has been cleaned up and prolonged to guidance present day roff(7) macros, like synchronizing code from NetBSD and the Heirloom doctools model. FreeBSD head.