Trailing commas + mix format

[Sebb]

What do you think about adding tabular code formatting?

Do you use formatter in your elixir project?

I love tabular code. This defp decode(addr_t(:ind), _dest, data) do case data do <<0::6, data::bits>> -> {:t_data_ind, nil, data} <<0b01::2, seq::4, data::bits>> -> {:t_data_con, seq, data} <<0b1000_0000::8>> -> {:t_connect, nil, <<>>} <<0b1000_0001::8>> -> {:t_discon, nil, <<>>} <<0b11::2, seq::4, 0b10::2>> -> {:t_ack, seq, <<>>} <<0b11::2, seq::4, 0b11::2>> -> {:t_nak, seq, <<>>} _ …

And what do you think about making the formatter bringing all clauses to a single line when possible, eg here when the inspect is removed:

case number do
  1 ->
    :one

  2 ->
    :two

  3 ->
    :three

  number ->
    IO.inspect(number)
    :very_big
end