svoid test_formatDouble_significant2() {
  assertEqualsVerbose("12345", formatDouble_significant2(12345, 3));
  assertEqualsVerbose("1234", formatDouble_significant2(1234.5, 3));
  assertEqualsVerbose("123", formatDouble_significant2(123.45, 3));
  assertEqualsVerbose("123.5", formatDouble_significant2(123.45, 4));
  assertEqualsVerbose("-123.5", formatDouble_significant2(-123.45, 4));
  assertEqualsVerbose("12.3", formatDouble_significant2(12.345, 3));
  assertEqualsVerbose("1.23", formatDouble_significant2(1.234, 3));
  assertEqualsVerbose("1.234", formatDouble_significant2(1.234, 4));
  assertEqualsVerbose("0.0123", formatDouble_significant2(0.01234, 3));
  assertEqualsVerbose("0", formatDouble_significant2(0, 3));
}