Someone

                message.plain = dedent('''
                    Fedora user %(user)s, aka %(name)s <%(email)s> has requested
                    membership for %(applicant) (%(applicant_name)) in the %(group) group and needs a sponsor.
    
                    Please go to %(url)s to take action.  
                    ''') % {'user': person.username, 'name': person.human_name, 'applicant': target.username, 'applicant_name': target.human_name, 'email': person.emails['primary'].email, 'url': url, 'group': group.name} )