code: public static final String escapeString(final String delimiter,
              final String input) {
          final String escaped = escapeString(input);
          if (escaped.isEmpty()) {
              return escaped;
          }
          return delimiter + escaped;
      }
docs: Convert the string for use in HTML or URLs.
  
  @param delimiter a spacer string to add
  @param input unescaped string.
  @return the escaped string.