add defoverridable test for keywords

Author: jbodah

spec/syntax/keyword_spec.rb

@@ -28,4 +28,19 @@
  assert length(captured) > 0
  EOF
  end
+
+ it 'defoverridable' do
+ expect(<<~EOF).to include_elixir_syntax('elixirKeyword', 'init:')
+ defmodule Test do
+ defmacro __using__(_options) do
+ quote do
+ def init(args) do
+ {:ok, args}
+ end
+ defoverridable init: 1
+ end
+ end
+ end
+ EOF
+ end
 end