set flag match3_withInts_debug.

svoid test_match3_withInts() {
  new Matches m;
  assertTrueVerbose(match3_withInts("number <int>", "number 1", m));
  assertEqualsVerbose(ll("1"), asList(m.m));
  assertFalseVerbose(match3_withInts("number <int>", "number x"));
}