#vulnerable code 
                                public static void displayDifferences(PrintStream out, Context context, String actionStr,
                                          List<Difference> differences, Consumer<Difference> displayOneDifference) {
        int truncateOutput = context.getTruncateOutput();
        if (truncateOutput < 1) {
            return;
        }

        int quarter = truncateOutput / 4;

        int differencesSize = differences.size();
        for (int index = 0; index < differencesSize; index++) {
            Difference difference = differences.get(index);
            if (index >= truncateOutput && (differencesSize - index) > quarter) {
                out.println("  [Too many lines. Truncating the output] ...");
                int moreFiles = differencesSize - index;
                out.printf(actionStr + "%d %s more%n", moreFiles, plural("file", moreFiles));
                break;
            }

            if (displayOneDifference != null) {
                displayOneDifference.accept(difference);
            }
        }
    } 
                            #location 16 
                            #vulnerability type CHECKERS_PRINTF_ARGS
#fixed code
                                public static void displayDifferences(PrintStream out, Context context, String actionStr,
                                          List<Difference> differences, Consumer<Difference> displayOneDifference) {
        int truncateOutput = context.getTruncateOutput();
        if (truncateOutput < 1) {
            return;
        }

        int quarter = truncateOutput / 4;

        int differencesSize = differences.size();
        for (int index = 0; index < differencesSize; index++) {
            Difference difference = differences.get(index);
            if (index >= truncateOutput && (differencesSize - index) > quarter) {
                out.println("  [Too many lines. Truncating the output] ...");
                int moreFiles = differencesSize - index;
                out.printf("%s%d %s more%n", actionStr, moreFiles, plural("file", moreFiles));
                break;
            }

            if (displayOneDifference != null) {
                displayOneDifference.accept(difference);
            }
        }
    }