code: public static String escapeTitle(final String title) {
          final String escapedTitle = title.replaceAll("^[^" + UNICODE_TITLE_START_CHAR + "]*", "").replaceAll("[^" + UNICODE_WORD + ". -]",
                  "");
          if (isNullOrEmpty(escapedTitle)) {
              return "";
          } else {
              // Remove whitespace
              return escapedTitle.replaceAll("\\s+", "_").replaceAll("(^_+)|(_+$)", "").replaceAll("__", "_");
          }
      }
docs: Escapes a title so that it is alphanumeric or has a fullstop, underscore or hyphen only.
  It also removes anything from the front of the title that isn't alphanumeric.
  
  @param title The title to be escaped
  @return The escaped title string.