∀ {α₁ α₂ β₁ β₂ : Type u_1} [inst : Std.Iterator α₁ Id β₁] [inst_1 : Std.Iterator α₂ Id β₂] {it₁ : Std.Iter β₁}
  {it₂ : Std.Iter β₂} [Std.Iterators.Finite α₁ Id] [Std.Iterators.Productive α₂ Id],
  (it₁.zip it₂).toList = it₁.toList.zip (Std.Iter.take it₁.toList.length it₂).toList