// x max= blub(); => x = max(x, blub());
svoid tok_maxEquals(LS tok) {
  int i;
  while ((i = jfind(tok, "<id> max=")) >= 0) {
    S var = tok.get(i);
    int j = tok_findEndOfExpression(tok, i);
    replaceTokens(tok, i+2, i+5, "= max(" + var + ",");
    tokAppend(tok, j-1, ")");
    reTok(tok, i+2, j);
  }
}