code: function isSimpleIndentationElement(node) {
  	if (!isIndentationElement(node)) {
  		return false;
  	}
  
  	for (var i = 0; i < node.attributes.length; i++) {
  		if (!isHtmlNamespace(node.attributes[i].namespaceURI)
  		|| ["style", "dir"].indexOf(node.attributes[i].name) == -1) {
  			return false;
  		}
  	}
  
  	for (var i = 0; i < node.style.length; i++) {
  		// This is approximate, but it works well enough for my purposes.
  		if (!/^(-[a-z]+-)?(margin|border|padding)/.test(node.style[i])) {
  			return false;
  		}
  	}
  
  	return true;
  }
docs: "A simple indentation element is an indentation element that has no attributes except possibly  * "a style attribute that sets no properties other than "margin", "border", "padding", or subproperties of those; and/or * "a dir attribute."