Use .example-element instead of doge 😢

docs/content/reboot.md

@@ -111,9 +111,9 @@ The `<pre>` element is reset to remove its `margin-top` and use `rem` units for
 <div class="bd-example">
 {% markdown %}
 <pre>
-        Wow
-  such
-      preformatted text
+.example-element {
+  margin-bottom: 1rem;
+}
 </pre>
 {% endmarkdown %}
 </div>