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let rec to_grid_aux tokens max_width acc =
match tokens with
| [] -> acc
| h :: t ->
let new_cell = Cell.create h |> Cell.with_left acc in
let new_acc = acc |> Cell.with_right new_cell in
to_grid_aux t max_width new_acc
let to_grid tokens max_width : Cell.t option =
match tokens with
| [] -> None
| h :: t ->
let first_cell = Cell.create h in
Some (to_grid_aux t max_width first_cell)
|