Add more snippets

docs/documentation/elements/content.html

@@ -164,11 +164,7 @@ variables:
       <p>This <code>content</code> class can be used in <em>any</em> context where you just want to (or can only) write some <strong>text</strong>. For example, it's used for the paragraph you're currently reading.</p>
     </div>
 
-    <div class="bd-example">
-      {{content_example}}
-    </div>
-
-    {% highlight html %}{{content_example}}{% endhighlight %}
+    {% include snippet.html content=content_example fullheight=true %}
 
     {% include anchor.html name="Sizes" %}