static LS tok_insertAFewSpaces(LS tok) {
  int n = l(tok);
  for (int i = 1; i+2 < n; i += 2) {
    if (eqGet(tok, i+1, "")) {
      S me = get(tok, i), next = get(tok, i+2);
      if (eq(me, "}") && isIdentifier(next))
        tok.set(i+1, " ");
    }
  }
  ret tok;
}