Package: dpkg
Version: 1.20.9
Severity: minor
File: /usr/share/man/man1/dpkg.1.gz
Man page says
--unpack package-file...
Unpack the package, but don't configure it. If --recursive or -R
option is specified, package-file must refer to a directory
instead.
But wait, it should also mention --unpack processes triggers:
# dpkg --unpack /var/cache/apt/archives/grub-pc_2.06-2_amd64.deb
(Reading database ... 145018 files and directories currently installed.)
Preparing to unpack .../grub-pc_2.06-2_amd64.deb ...
Unpacking grub-pc (2.06-2) over (2.06-2) ...
Processing triggers for man-db (2.9.4-2) ...