@Override
  public @NotNull String getDemoText() {
    return "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\">\n" +
           "<!--\n" +
           "*        Sample comment\n" +
           "-->\n" +
           "<HTML>\n" +
           "<head>\n" +
           "<title>" + FULL_PRODUCT_NAME + "</title>\n" +
           "</head>\n" +
           "<body>\n" +
           "<h1>" + FULL_PRODUCT_NAME + "</h1>\n" +
           "<p><br><b><IMG border=0 height=12 src=\"images/hg.gif\" width=18 >\n" +
           "What is " + FULL_PRODUCT_NAME.replaceAll(" ", "&nbsp;") + "? &#x00B7; &Alpha; </b><br><br>\n" +
           "<<custom_tag_name>custom-tag</custom_tag_name>>" +
           "hello" +
           "</<custom_tag_name>custom_tag</custom_tag_name>>\n" +
           "</body>\n" +
           "</html>";
  }
@Override
  public @NotNull String getDemoText()