static RuntimeException wrapPatternSyntaxException(PatternSyntaxException e) {
  if (e == null) null;
  S pat = e.getPattern();
  int i = e.getIndex();
  ret new RuntimeException("Regular expression error between " + multiLineQuoteWithSpaces(substring(pat, 0, i)) + " and " + multiLineQuoteWithSpaces(substring(pat, i)) + " - " + e.getMessage());
}