msghack(1) on Linux
The text b654bcab2caf, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster) shipped it. The page shows this text now.
alter PO files in ways
Flags it lists
-
--append -
--empty -
--invert -
--master -
-o