update markdown code example to correctly reflect line breaks

index.html

@@ -127,7 +127,9 @@
 
 					<pre><code contenteditable style="margin-top: 20px;">&lt;section data-markdown&gt;
   ## Markdown support
-  For those of you who like that sort of thing. Instructions and a bit more info available [here](https://github.com/hakimel/reveal.js#markdown).
+
+  For those of you who like that sort of thing. 
+  Instructions and a bit more info available [here](https://github.com/hakimel/reveal.js#markdown).
 &lt;/section&gt;
 					</code></pre>
 				</section>