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_irb.rb
    path of file: ./repos/ruby/test/irb
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require "irb"

require_relative "helper"

module TestIRB
  class
    
    def test_symbol_aliases_are_handled_correctly_with_singleline_mode
      write_rc <<~RUBY
        IRB.conf[:USE_SINGLELINE] = true
      RUBY

      write_ruby <<~'RUBY'
        class Foo
        end