[Demonstration 1]

[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));

[Demonstration 2]

[Buggy Method]
private String resolveName() {
    String name = Classes.getNonDynamic(getClass()).getSimpleName();
    if (name.equals(Container.class.getSimpleName())) {
        return name + '#' + ID_COUNTER.getAndIncrement();
    }
    if (name.endsWith("Container")) {
        return CAMEL_TO_DASH.matcher(name).replaceAll("$1-$2").substring(0, "Container".length() - 1).toLowerCase();
    }
    return name;
}

[Buggy Hunk]
.substring(0, "Container".length() - 1)

[Patch]
.substring(0, "Container".length() + 1)

[Demonstration 3]

[Buggy Method]
public static String getTableNameByForeignColumn(String foreignColumnName) {
    if (!TextUtils.isEmpty(foreignColumnName)) {
        if (foreignColumnName.toLowerCase().endsWith("_id")) {
            return foreignColumnName.substring(0, foreignColumnName.length() - "_id".length());
        }
        return null;
    }
    return null;
}

[Buggy Hunk]
if (foreignColumnName.toLowerCase().endsWith("_id")) {

[Patch]
if (foreignColumnName.toLowerCase(Locale.US).endsWith("_id")) {