Bug: formatting can go over the set margin

[shym]

Sometimes the set margin gets lost in reformatting.

Using ocamlformat v0.28.1 with the default configuration (in particular margin set to 80 columns), here are two small examples where we see ) and , can appear in the 81-th and 82-th columns.

let a = 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + (1 * (1 + 1))

let b =
  ( 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + (1 * (1 + 1)),
    1 )