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sS combineToNLPatternIncludingPunctuation(S a, S b) {
  if (a == null || b == null) null;
  L<S> tok1 = codeTokens(javaTok(a));
  L<S> tok2 = codeTokens(javaTok(b));
  if (l(tok1) != l(tok2)) null;
  new L<S> out;
  for i over tok1: {
    S t = tok1.get(i);
    out.add(eqic(t, tok2.get(i)) ? t : "*");
  }
  ret joinWithSpace(out);
}

sS combineToNLPatternIncludingPunctuation(Iterable<S> l) {
  ret foldl_noSeed(func(S a, S b) -> S { combineToNLPatternIncludingPunctuation(a, b) }, l);
}