title: Difference between 'throw' and 'throw new Exception()'
body: <p>What is the difference between</p>
  <pre><code>try { ... }
  catch{ throw }
  </code></pre>
  <p>and</p>
  <pre><code>try{ ... }
  catch(Exception e) {throw new Exception(e.message) }
  </code></pre>
  <p>regardless that the second shows a message.</p>