title: String vs StringBuffer. Tip of IDEA
body: <p>Intellij Idea offers to replace the following:</p>
  
  <pre><code>StringBuffer sb = new StringBuffer();
  sb.append("Name=").append(name).append(", name2=").append(name2).append(", list=").append(list);
  return sb.toString();
  </code></pre>
  
  <p>To:</p>
  
  <pre><code>return "name=" + name + ", name2=" + name2 + ", list=" + list;
  </code></pre>
  
  <p>As far as I know it's less effective (mutable/immutable).
  So, what's better?</p>