code: public static String escapeAppVersion(String s) {
          s = cleanWS(s);
          s = replaceAll(s, BackSlashPtn, EscBackSlash);
          s = replaceAll(s, LParenPtn, EscLParen);
          return s;
      }
docs: Escape an application version string.
  
  @param s
  
  @return The escaped app version.