[Demonstration 1]

[Buggy Method]
public boolean hasPrevious() {
    return ((currentElementIndex - 1) != 0);
}

[Buggy Hunk]
return ((currentElementIndex - 1) != 0);

[Patch]
return ((currentElementIndex - 1) > -1);

[Demonstration 2]

[Buggy Method]
public InlineQueryResultArticle getInline() {
    instance.getBitcoinHandler().getLock().lock();
    try {
        return InlineQueryResultArticle.builder().title(type.getHumanizedName()).description(String.format("Price: $%.2f", getAverage(0))).inputMessageContent(InputTextMessageContent.builder().messageText(getFormattedMessage(true, -1)).parseMode(ParseMode.MARKDOWN).build()).replyMarkup(InlineKeyboardMarkup.builder().addRow(InlineKeyboardButton.builder().text("Start live updates!").callbackData(type.toString()).build()).build()).build();
    } catch (Exception ex) {
        ex.printStackTrace();
    } finally {
        instance.getBitcoinHandler().getLock().unlock();
    }
    return null;
}

[Buggy Hunk]
.description(String.format("Price: $%.2f", getAverage(0)))

[Patch]
.description(String.format("Price: $%.2f", getAverage(99)))

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));