addch(3) on FreeBSD
The text 8bcfb61af591, as FreeBSD 2.2.8-RELEASE, FreeBSD 2.2.7-RELEASE, FreeBSD 2.2.6-RELEASE, FreeBSD 2.2.5-RELEASE, FreeBSD 2.2.2-RELEASE shipped it.
add a character (with attributes) to a ncurses window, then advance the cursor