code: public void appendEAttribute(final Appendable appendable,
  								final CharSequence attrName, final String attrRawValue)
  			throws IOException {
  		appendable.append(' ').append(attrName).append("=\"")
  				.append(this.escaper.escapeXMLAttribute(attrRawValue))
  				.append('"');
  	}
docs: Append a space and new element to the appendable element, the name of the element is
  attrName and the value is attrRawValue. The will be escaped if necessary
  
  @param appendable   The StringBuilder to which the new element should be added.
  @param attrName     The new element name
  @param attrRawValue The value of the element
  @throws IOException If an I/O error occurs