-Code.require_file "test_helper.exs", __DIR__
+Code.require_file("test_helper.exs", __DIR__)
 
 defmodule ExceptionTest do
   use ExUnit.Case, async: true


    test "ArithmeticError" do
      assert %ArithmeticError{} |> message == "bad argument in arithmetic expression"
      assert %ArithmeticError{message: "unexpected camembert"} |> message == "unexpected camembert"
    end

    test "ArgumentError" do

  end

  test "format/2 without stacktrace" do
    stacktrace =
      try do
        throw(:stack)
      catch
        :stack -> System.stacktrace()
      end

    assert Exception.format(:error, :badarg) ==
             "** (ArgumentError) argument error\n" <> Exception.format_stacktrace(stacktrace)
  end

  test "format/2 with empty stacktrace" do
