static LS tlft_honoringTokens(S s) {
  new L<Int> indices;
  LS tok = javaTok(s);
  new LS out;
  int start = 0;
  for (int i = 2; i+1 < l(tok); i += 2) {
    continue unless containsNewLine(tok.get(i));
    addIfNempty(out, trimJoinSubList(tok, start, i));
    start = i+1;
  }
  if (start < l(tok))
    addIfNempty(out, trimJoinSubList(tok, start));
  ret out;
}

Began life as a copy of #1025618