Indentation

Indentation.java

public String doStuff(StringBuffer data) {
    
    if(data != null) {
        for (int i = 0; i < 10; i++) {
            for (int j = 0; j < 10; j++) {
                data.append(String.valueOf(i+j));
            }
            data.append("\n");
        }
    } else {
        data = new StringBuffer");
    }

    return data.toString();
}