assertTrue(output.contains(" 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F"));
    }

    @Test
    @DisplayName("Should handle control characters in hexdump")
    void testHexdumpControlCharacters() {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PrintStream ps = new PrintStream(baos);

        // Test with control characters and printable characters