title: How to change placeholder in select2?
body: <p>How do I change the data placeholder with select2?</p>
  
  <p>So far I've tried this.</p>
  
  <pre><code>$("#city").select2({placeholder:"foo"});
  </code></pre>
  
  <p>And this...</p>
  
  <pre><code>$("#city").attr("data-placeholder","bar");
  </code></pre>
  
  <p>But neither works.</p>