Some recently installed packages appear like so:
[date] [time] install [package name] [date] [time] installed [package name]
but some packages (e.g. man-db which I haven't manually installed) appear with only:
[date] [time] installed [package name]
What's the difference?
This observation is from the most recent dpkg log.
Distro: Linux Mint 17.2 Rafaela
dpkg version: 1.17.5