code: def make_script_sig(stack_script, redeem_script):
      '''
      str, str -> bytearray
      '''
      stack_script += ' {}'.format(
          serialization.hex_serialize(redeem_script))
      return serialization.serialize(stack_scriptf make_script_sig(stack_script, redeem_script):
      '''
      str, str -> bytearray
      '''
      stack_script += ' {}'.format(
          serialization.hex_serialize(redeem_script))
      return serialization.serialize(stack_script)
docs: str, str -> bytearray