@desc does not work for field arguments

[binarylogic]

Environment

• Elixir version (elixir -v): 1.7.3
• Absinthe version (mix deps | grep absinthe): 1.5.0-alpha.1

Expected behavior

query do
  field :my_operation do
    @desc "My argument description"
    arg :my_arg, :integer
  end
end

I expect the @desc call to add a :description to the argument.

Actual behavior

The @desc above an argument does not work, it appears to be completely ignored.

[FloatingFront]

Same issue is popping up here:

Environment

• Elixir version (elixir -v):
  Erlang/OTP 21 [erts-10.1] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]
  Elixir 1.8.1 (compiled with Erlang/OTP 21)

• Absinthe version (mix deps | grep absinthe):
  absinthe 1.4.16 (Hex package) (mix)
  locked at 1.4.16 (absinthe) 0933e4d9
  absinthe_plug 1.4.2 (Hex package) (mix)
  locked at 1.4.2 (absinthe_plug) 01bf16f0
  absinthe_phoenix 1.4.2 (Hex package) (mix)
  locked at 1.4.2 (absinthe_phoenix) cb84c81b
  absinthe_relay 1.4.0 (Hex package) (mix)
  locked at 1.4.0 (absinthe_relay) 0c65cb40

Expected behavior

Adding description to fields should be reflected in the response.

Neither this:

 query do
    field :menu_items, list_of(:menu_item),
          description: "The list of available items on the menu" do
      resolve fn _, _, _ ->
        {:ok, Repo.all(Menu.Item)}
      end
    end
end

Nor this:

query do
    @desc "The list of available items on the menu"
    field :menu_items, list_of(:menu_item) do
      resolve fn _, _, _ ->
        {:ok, Repo.all(Menu.Item)}
      end
    end
end

does provide description in the response.

Actual behavior

No field description is generated in the response