Add missing </script> tag to options page code sample.

chrome/common/extensions/docs/templates/articles/options.html

 <h1>Options</h1>
 
 <p>To allow users to customize the behavior of your extension, you may wish to provide an options page. If you do, a link to it will be provided from the extensions management page at chrome://extensions. Clicking the Options link opens a new tab pointing at your options page.
 
 <h2 id="step_1">Step 1: Declare your options page in the manifest</h2>
 
 <pre>{
   "name": "My extension",
   ...
   <b>"options_page": "options.html"</b>,
@@ skipping 36 matching lines @@
     }
   }
 }
 document.addEventListener('DOMContentReady', restore_options);
 document.querySelector('#save').addEventListener('click', save_options);
 </pre>
 
 <pre>
 &lt;html>
 &lt;head>&lt;title>My Test Extension Options&lt;/title>&lt;/head>
-&lt;script src="options.js">
+&lt;script src="options.js">&lt;/script>
 
 &lt;body>
 
 Favorite Color:
 &lt;select id="color">
  &lt;option value="red">red&lt;/option>
  &lt;option value="green">green&lt;/option>
  &lt;option value="blue">blue&lt;/option>
  &lt;option value="yellow">yellow&lt;/option>
 &lt;/select>
 
 &lt;br>
 &lt;div id="status">&lt;/div>
 &lt;button id="save">Save&lt;/button>
 &lt;/body>
 &lt;/html>
 </pre>
 
 <h2 id="important_notes">Important notes</h2>
 <ul>
 <li>We plan on providing some default css styles to encourage a consistent look across different extensions' options pages. You can star <a href="http://crbug.com/25317">crbug.com/25317</a> to be notified of updates.</li>
 </ul>