| Box (box_spec, terms) ->
sprintf "\\%s [%s]" (pp_box_spec box_spec)
(String.concat " " (List.map pp_term terms))
+ | Group terms ->
+ sprintf "\\GROUP [%s]" (String.concat " " (List.map pp_term terms))
and pp_magic = function
| List0 (t, sep_opt) ->