code: func MsgOptionText(text string, escape bool) MsgOption {
  	return func(config *sendConfig) error {
  		if escape {
  			text = slackutilsx.EscapeMessage(text)
  		}
  		config.values.Add("text", text)
  		return nil
  	}
  }
docs: // MsgOptionText provide the text for the message, optionally escape the provided
  // text.