code: public void openElement(String elementName) throws IOException {
  		assert(elementNames.size() > 0);
  		assert(elementNames.get(elementNames.size() - 1).equals(elementName));		
  		writer.write(">");
  		if(indent || noTextElement) {
  			writer.write("\n");
  		}
  	}
docs: Writes '>\n'.