}

    @Test
    @DisplayName("Test appendCol helper method")
    void testAppendCol() {
        StringBuffer sb = new StringBuffer();

        // Test with short string
        ace.appendCol(sb, "test", 10);
        assertEquals("test      ", sb.toString());

        // Test with exact width string
        sb = new StringBuffer();
        ace.appendCol(sb, "exact", 5);