how-jquery-works: Fix markdown inside div

Fixes #813.

page/about-jquery/how-jquery-works.md

@@ -28,7 +28,9 @@ This is a basic tutorial, designed to help you get started using jQuery. If you
 
 The `src` attribute in the `<script>` element must point to a copy of jQuery. Download a copy of jQuery from the [Downloading jQuery](http://jquery.com/download/) page and store the `jquery.js` file in the same directory as your HTML file.
 
-<div class="warning">**Note**: When you download jQuery, the file name may contain a version number, e.g., `jquery-x.y.z.js`. Make sure to either rename this file to `jquery.js` or update the `src` attribute of the `<script>` element to match the file name.</div>
+<div class="warning">
+**Note**: When you download jQuery, the file name may contain a version number, e.g., `jquery-x.y.z.js`. Make sure to either rename this file to `jquery.js` or update the `src` attribute of the `<script>` element to match the file name.
+</div>
 
 ### Launching Code on Document Ready
 
@@ -53,7 +55,9 @@ $( document ).ready(function() {
 });
 ```
 
-<div class="warning">**Note**: The jQuery library exposes its methods and properties via two properties of the <code>window</code> object called <code>jQuery</code> and <code>$</code>. <code>$</code> is simply an alias for <code>jQuery</code> and it's often employed because it's shorter and faster to write.</div>
+<div class="warning">
+**Note**: The jQuery library exposes its methods and properties via two properties of the <code>window</code> object called <code>jQuery</code> and <code>$</code>. <code>$</code> is simply an alias for <code>jQuery</code> and it's often employed because it's shorter and faster to write.
+</div>
 
 For example, inside the `ready` event, you can add a click handler to the link: