What I did
sudo pacdiff
If no pacnew are found it will show nothing, if found example below
pacnew file found for /etc/fonts/fonts.conf
:: (V)iew, (S)kip, ( R)emove pacnew, (O)verwrite with pacnew, (Q)uit: [v/s/r/o/q]
Select ‘o’ and you are done for each pacnew file you have to select ‘o’.