I maintain a git linting tool, and one of our users has spotted a bug in the Co-authored-by implementation.
They only work if they are the last trailers. Git supports many arbitrary trailers, so it would be better do be a bit less strict about what you consider a trailer
Add Payment to the module [#12312312] Co-authored-by: Txx Lxxx <email@example.com>
Shows a two avatars
Extract payment notification handling into class Co-authored-by: Txx Lxxx <firstname.lastname@example.org> Relates-to: [#12312312]