Use new read_packages_file function

gui

@@ -324,7 +324,7 @@ details_window() { #input: prefix/app
 
   #If package-app, show what packages it installs
   if [ -f "${DIRECTORY}/apps/${app}/packages" ];then
-    local packages="$(cat "${DIRECTORY}/apps/${app}/packages")"
+    local packages="$(read_packages_file "$app")"
     if [ "$(wc -w <<<"$packages")" == 1 ];then
       #if package-app uses only 1 package, use singular case
       abovetext+=$'\n'"- This app installs the <b>${packages}</b> package."

manage

@@ -663,8 +663,9 @@ elif [ "$1" == 'install' ] || [ "$1" == 'uninstall' ];then
     appscript=("${DIRECTORY}/apps/${app}/${scriptname}")
     chmod u+x "$appscript" &>/dev/null
   #if this app just lists a package-name, set the appscript to install that package
-  else
-    appscript=(bash -c -o pipefail "apt_lock_wait ; sudo -E apt $(echo "$action" | sed 's/uninstall/purge --autoremove/g') -yf $(cat "${DIRECTORY}/apps/$app/packages") 2>&1 | less_apt")
+
+  else #package-app: directly use apt to install what is mentioned in the packages file
+    appscript=(bash -c -o pipefail "apt_lock_wait ; sudo -E apt $(echo "$action" | sed 's/uninstall/purge --autoremove/g') -yf $(read_packages_file "$app") 2>&1 | less_apt")
   fi
 
   #print to terminal