textwrap(3) on Linux
The text 6aa55fdc9d21, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it. The page shows this text now.
line-folding (text-wrapping) library with i18n support