They would be printed during update every time they are created.
There are also extra hooks and things if you want them.
Including manjaro-pacnew-checker which is actually a ‘more friendly gui’ for handling pacnews and a hook that will run when required by updates:
extra/manjaro-pacnew-checker 0.5.4-1 [27.68 KiB 74.42 KiB]
Simple checker for pacnew/pacsave files and manage it
And other packages like this AUR one that is really just the hook:
aur/pacdiff-pacman-hook-git r81.9d5f298-1 [+13 ~2.60]
Pacman hook to review .pacnew files automatically
It would seem you skipped the part where you set the DIFFPROG variable and/or the part where you source the environment file.
Assuming the configuration has been set but is somehow not recognized, then a logout/login or reboot should work.
As with all environment variables you can also (temporarily) define it on the command line:
DIFFPROG=/usr/bin/meld pacdiff -s
A friendly note:
pacnew/pacsave/etc is admittedly probably one of the most difficult things to do to maintain an Arch/Manjaro install, especially for new or casual users.
The good news is;
- They really arent as scary as they seem at first. Promise.
- When they are managed they only come a few at a time every once in a while. ~ a few a year.
- Once you become familiar with them you may actually begin to admire the robustness of the updates along with continual honoring of user configurations that is provided by the model.