a := []string{"1:one", "2:two", "3:three"}
	presentInMap(Sprintf("%v", m1), a, t)
	presentInMap(Sprint(m1), a, t)
	// Pointer to map prints the same but with initial &.
	if !strings.HasPrefix(Sprint(&m1), "&") {
		t.Errorf("no initial & for address of map")
	}
	presentInMap(Sprintf("%v", &m1), a, t)
	presentInMap(Sprint(&m1), a, t)
}

func TestEmptyMap(t *testing.T) {