Can spread dictionary in attach

[LamprosPitsillos]

args gets stingyfied along with the 2 dots i added

  let X(pre: [],att:(), post: []) = {
  let args = arguments(..att,[A])
    let name = [#pre] + [$attach(..args)$] + [#post];
    align(center)[#name]
    // matrix_dim(dim: ("n", "k"))[#name]
  }
  X(pre:2,post:4,att:(t:h))
  X(pre:2)

[PgBiel]

Math mode does not support the spread operator; use #math.attach(..args) instead.