set flag ShuntingYardParser_debug.

svoid test_simpleCalc() {
  testFunctionValues simpleCalc(
    "1+2*3", 7.0,
    "1 + 2 * 3", 7.0,
    "-3e2", -300.0,
    " - 3e2 ", -300.0,
    "-(1+2)", -3.0,
    " - ( 1 + 2 ) ", -3.0,
  );
}