How do I read this javascript diagram?
<p>I'm currently reading <em>Javascript: The Good Parts</em> and I'm having trouble understanding their "grammar" diagrams. </p>

<p>The first one is Whitespace</p>

<p><img src="http://i.stack.imgur.com/RNLiZ.png" alt="enter image description here"></p>

<p>I'm not quite sure how to read it, perhaps some code will help me understand?</p>

<p>Thanks for the help in advanced guys.</p>
