-sep doesn't work as expected

[ericnoel]

I'm using exiftool version 9.08 on max os

I want to change the way a "list" is separated:
Erics-MacBook-Air-3:life360-images eric$ exiftool -Description Settings.jpg
Description                     : Settings.Logout.Logged in as:.Version ....Family Members.Tracking Options.Map Options.Alert Options.My Account

so I use the -sep option but it has no affect

Erics-MacBook-Air-3:life360-images eric$ exiftool -Description Settings.jpg -sep "|"
Description                     : Settings.Logout.Logged in as:.Version ....Family Members.Tracking Options.Map Options.Alert Options.My Account

[Phil Harvey]

The -sep option applies only to list-type tags when multiple values are stored.  Description is not a list-type tag.  (See the tag name documentation for an indication of which tags are list type.)  But you can reformat the value of any tag using a user-defined Composite tag if you want.

- Phil