Adds `data-equalizer-watch="foo"` in the example markup, reflecting the markup in the working example beneath it.
```html
<div class="row" data-equalizer="foo">
<div class="medium-4 columns" data-equalizer-watch="foo">
- <div class="callout" data-equalizer="bar">
+ <div class="callout" data-equalizer-watch="foo" data-equalizer="bar">
<h3>Parent panel</h3>
<div class="callout" data-equalizer-watch="bar"></div>
<div class="callout" data-equalizer-watch="bar"></div>