static <T> Writer<T> text() {
		return (xml, data) -> {
			if (data != null) {
				xml.writeCharacters(data.toString());
			}
		};
	}
Create a new text {@code Writer}, which writes the given data as string
to the outer element.

@param <T> the data type, which is written as string to the outer element
@return a new text writer
jenetics.xml/src/main/java/io/jenetics/xml/stream/Writer.java