Formatter doesn't insert new line after constant definition

[rhnonose]

Environment

• Erlang/OTP 21 [erts-10.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe]
• Elixir 1.8.1 (compiled with Erlang/OTP 20)`
• macOS High Sierra 10.13.6

Current behavior

Formatting of a file doesn't include blank lines between a constant and a function definition. A reproducible snippet:

defmodule MyModule do
  @const [
    :test1,
    :test1
  ]
  def my_function do
    :do_nothing
  end
end

The formatter doesn't insert a blank line between ] and def my_function do. If there's a blank line, the formatter keeps it.

Expected behavior

The formatter should insert a blank line between ] and def my_function do.

[josevalim]

It is on purpose becomes sometimes you want the attribute stay close to the function, such as @spec, @doc, etc. We also don't want to hardcode special module attributes (as you can always define your own), so we have to respect the user choice. For example, this would be completely valid:

  @decorate [Foo, Bar]
  def foo(...)

And if we put them apart users would be angry at us. :)