You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test_protocol.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/test/net/protocol
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require "test/unit"
require "net/protocol"
require "stringio"

class TestPro
    
  def test_should_properly_dot_stuff_period_with_no_endline
    bug9627 = '[ruby-core:61441] [Bug #9627]'
    sio = StringIO.new("".dup)
    imio = Net::InternetMessageIO.new(sio)
    email = "To: bob@aol.com\nlook, a period with no endline\n."
    imio.write_message(email)
    assert_equal("To: bob@aol.com\r\nlook, a period with no endline\r\n..\r\n.\r\n", sio.string, bug9627)
  end