docs: def set_computer_desc(desc):
      '''
      Set PRETTY_HOSTNAME value stored in /etc/machine-info
      This will create the file if it does not exist. If
      it is unable to create or modify this file returns False.
  
      :param str desc: The computer description
      :return: False on failure. True if successful.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' system.set_computer_desc "Michael's laptop"
      '''
      desc = salt.utils.stringutils.to_unicode(
          desc).replace('"', r'\"').replace('\n', r'\n').replace('\t', r'\t')
  
      hostname_cmd = salt.utils.path.which('hostnamectl')
      if hostname_cmd:
          result = __salt__['cmd.retcode'](
              [hostname_cmd, 'set-hostname', '--pretty', desc],
              python_shell=False
          )
          return True if result == 0 else False
  
      if not os.path.isfile('/etc/machine-info'):
          with salt.utils.files.fopen('/etc/machine-info', 'w'):
              pass
  
      pattern = re.compile(r'^\s*PRETTY_HOSTNAME=(.*)$')
      new_line = salt.utils.stringutils.to_str('PRETTY_HOSTNAME="{0}"'.format(desc))
      try:
          with salt.utils.files.fopen('/etc/machine-info', 'r+') as mach_info:
              lines = mach_info.readlines()
              for i, line in enumerate(lines):
                  if pattern.match(salt.utils.stringutils.to_unicode(line)):
                      lines[i] = new_line
                      break
              else:
                  # PRETTY_HOSTNAME line was not found, add it to the end
                  lines.append(new_line)
              # time to write our changes to the file
              mach_info.seek(0, 0)
              mach_info.truncate()
              mach_info.writelines(lines)
              return True
      except IOError:
          return False