[Demonstration 1]

[Buggy Method]
@Override
public int onCollisionHighScoreIncrement() {
    return (int) Math.max(element.getSize() + element.getSpeed() - element.getSize(), 0);
}

[Buggy Hunk]
return (int) Math.max(element.getSize() + element.getSpeed() - element.getSize(), 0);

[Patch]
return (int) Math.max(element.getSize() + element.getSpeed(), 0);

[Demonstration 2]

[Buggy Method]
public static void commentReply(WebDriver driver, WebElement element, String message, boolean distinguish) {
    List<WebElement> buttons = element.findElement(By.className("buttons")).findElements(By.tagName("a"));
    for (int q = 0; q < buttons.size(); q++) {
        String buttName = buttons.get(q).getText();
        if (buttName.contains("reply") && buttons.get(q).isDisplayed()) {
            buttons.get(q).click();
            break;
        }
    }
    waitForElement(driver, "pmreplyform");
    List<WebElement> findComments = element.findElements(By.className("commenttextarea"));
    for (int f = 0; f < findComments.size(); f++) {
        if (findComments.get(f).isDisplayed()) {
            findComments.get(f).sendKeys(message);
            notTooFast(5);
            element.findElement(By.id("submitbutton")).click();
            break;
        }
    }
    notTooFast(10);
    // distinguish
    if (distinguish) {
        List<WebElement> findDist = driver.findElements(By.tagName("a"));
        for (int i = 0; i < findDist.size(); i++) {
            if (findDist.get(i).getText().contains("distinguish")) {
                findDist.get(i).click();
                break;
            }
        }
    }
}

[Buggy Hunk]
List<WebElement> findDist = driver.findElements(By.tagName("a"));

[Patch]
List<WebElement> findDist = element.findElements(By.tagName("a"));

[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));