(* Tuareg works correctly on this (if you drop the fun). *)
+(* jli found this great one. Tuareg gets confused by the paren before List.map and
+ indents |! way too far, under "k ^". ocp-indent should shine, since it understands the
+ format old (fun old -> "removed: "
+ ^ (List.map old ~f:(fun (k, v) -> k ^ "=" ^ acl_to_string v)
+ |! String.concat ~sep:", "))