In earlier versions of Clarity (pre-v13) we use the following syntax for next line within a gel script custom email body
In v13 this does not work. The output email is all in one line.
Release: ESPCLA99000-13.1-Clarity-Extended Support Plus
You would have to to place the <BR> tags exactly where you wish in the email but due to the nature of XML data processing you will need to 'escape' thefirst character of these tags to avoid script parsing confusion.
In order to do this, you would want to change the first character when you put the <BR> tags in to your email body, so that the less-than sign ( < ) is replaced by this character sequence: <