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: exec.rb
    path of file: ./repos/metasploit-framework/modules/payloads/singles/linux/x86
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

###
#
# Exec
# ----
#
# Executes an arbitrary command.
#
###
module MetasploitModule

  CachedSize = 43

  include Msf::Payload::Single
  include Msf::Payload::Linux

  def initialize(info =
    
  def initialize(info = {})
    super(merge_info(info,
      'Name'          => 'Linux Execute Command',
      'Description'   => 'Execute an arbitrary command or just a /bin/sh shell',
      'Author'        => ['vlad902',
                          'Geyslan G. Bem <geyslan[at]gmail.com>'],
      'License'       => MSF_LICENSE,
      'References'    => [ ['URL', 'https://github.com/geyslan/SLAE/blob/master/4th.assignment/tiny_execve_sh.asm'],
                           ['URL', 'https://github.com/geyslan/SLAE/blob/master/improvements/x86_execve_dyn.asm'] ],
      'Platform'      => 'linux',
      'Arch'          => ARCH_X86
    ))

    # Register exec options
    register_options(
      [
        OptString.new('CMD',  [ false,  "The command string to execute" ]),
      ])
    register_advanced_options(
      [
        OptBool.new('NullFreeVersion', [ true, "Null-free shellcode version", false ])
      ])
  end