Fix the pacdiff invocation so it correctly runs with sudo and with the colordiff environment variable

ArchUpdater.sh

@@ -2,7 +2,7 @@
 cd "$(dirname "$0")"
 
 #Check to make sure colordiff installed for the pacdiff step, install it if not, and export it as the editor
-export DIFFPROG=colordiff
+#export DIFFPROG=colordiff
 colordiff_installed=$(which colordiff)
 
 if [ -z "$colordiff_installed" ]; then
@@ -23,7 +23,7 @@ yay -Syu
 echo "Running pacdiff to check for any pacnew files that need to be dealt with" 
 
 #Pacdiff to check for pacnews to deal with
-pacdiff
+sudo DIFFPROG=colordiff pacdiff
 
 #Update flatpaks
 echo "Running sudo update flatpak"