/* package */ static final String HEADER_TEMPLATE = "Expected: %d lines, but found: %d lines.";

        public DifferentSizesLineListComparisonFailure(List<String> expectedLines, List<String> actualLines) {
            super(expectedLines, actualLines);
        }

        @Override
        public String getMessage() {
            return String.format(HEADER_TEMPLATE, expectedLines.size(), actualLines.size());
        }

        ["a", "b", "c"]         | ["d"]                 || InsufficientSizeLineListComparisonFailure    || String.format(InsufficientSizeLineListComparisonFailure.HEADER_TEMPLATE, 3, 1);
    }

    def "failing lines contained in comparison due to mismatched lines with single potential match: #expectedLines vs #actualLines"() {
        when: