pacdiff -o
will output or print all found pacnew/pacsave files.
This is fine.
filesystem is placed twice and should only probably retain the one at the end before fsck.
( Thanks for noticing @Teo I had missed it 
)
When you’re done making changes then to do the rebuilding of the initramfs that uses these options execute:
sudo mkinitcpio -P
sudo update-grub