@Test
void format() {

    // ignore surplus arguments
    assertThat(Strings.format("{}, {}, {}", 1, 2, 3, 4)).isEqualTo("1, 2, 3");
    assertThat(Strings.format("{}")).isEqualTo("{}");
    assertThat(Strings.format("{}", (Object[]) null)).isEqualTo("{}");
}