I've seen that other sites have done this but didn't manage to do it myself.
I have certain custom fields for each post and I want one of these custom fields to be shown in the RSS feed in the title for each item after the item's actual title. For example, if the post is named "Abracadabra and hocus pocus" and is written by James A. Author I would like the feed item title to be "Abracadabra and hocus pocus by James A. Author".
How can this be done?