Don't prepend a comma before the first non-out parameter if the first one is an out parameter
Don't prepend a comma before the first non-out parameter if the first one is an out parameter

gtk-rs/gir,EPashkin/gir,GuillaumeGomez/gir,GuillaumeGomez/gir,gtk-rs/gir,EPashkin/gir,gtk-rs/gir,GuillaumeGomez/gir