docs: private void appendProperty(StringBuffer sb, String propertyName,
  			Object propertyValue) {
  
  		if (propertyValue != null) {
  			propertyValue = propertyValue.toString().replaceAll("\\s+", " ")
  					.trim();
  		}
  		sb.append(ljust(propertyName + ":", 45) + propertyValue + "\n");
  	}