hl

defmodule Context do
  @moduledoc false

  defmacro __using__(opts) do
    repo = Keyword.fetch!(opts, :repo)

    quote do
      import Context, only: [context: 1, context: 2]

      Module.put_attribute(__MODULE__, :__repo__, unquote(repo))

bencrouse

# starting point (line is too long)
def send_mail(source)
  Mailer.deliver(to: 'bob@example.com', from: 'us@example.com', subject: 'Important message', body: source.text)
end

# bad (double indent)
def send_mail(source)
  Mailer.deliver(
      to: 'bob@example.com',
      from: 'us@example.com',