docs: public static boolean looksLikeXHTML (@Nullable final String sText)
    {
      // If the text contains an open angle bracket followed by a character that
      // we think of it as HTML
      // (?s) enables the "dotall" mode - see Pattern.DOTALL
      return StringHelper.hasText (sText) && RegExHelper.stringMatchesPattern ("(?s).*<[a-zA-Z].+", sText);
    }