code: void writeTextContent(String text) throws IOException {
  		writer.write((String) Strings.escapeXML(text));
  	}
docs: Escape XML reserved chars and write as element text content. Used by text and numbering operators to actually write the
  element text content. At the moment this method is invoked templates engine was already wrote start tag, including
  closing tag mark, e.g. <em>&lt;div attrs... &gt;</em>.
  
  @param text element text content.
  @throws IOException if underlying writer fails to write.