Update documentation

docs/en/basic_configuration.md

@@ -61,12 +61,20 @@ There are two configurations available, and they can both be set to one of three
   * `direct`: Regenerate only one level above (the direct parent)
   * `recursive`: Regenerate all parents recursively (up to the top of the SiteTree)
 
+EG:
+
+```yaml
+SilverStripe\CMS\Model\SiteTree:
+  regenerate_children: recursive
+  regenerate_parents: recursive
+```
+
 **Please note:** There are times when these configurations are ignored. For example, if you use Silverstripe's default
 behaviour and have `SiteTree::enforce_strict_hierarchy = true`, then this means that parent pages must be published for
 anyone to be able to view child pages. If you were to unpublish a parent page in the CMS, then default CMS behaviour
-would be for all child pages to also become unavailable to your users. As such, if you unpublish a page, then regardless
-of what your `regenerate_children` configuration is, we will always remove the cache of all of the child pages - as this
-matches the behaviour that the CMS follows.
+would be for all child pages to also become unavailable to your users. As such, if you unpublish a page and you have
+`enforce_strict_hierarchy = true`, then regardless of what your `regenerate_children` configuration is, we will always
+remove the cache of all of the child pages - as this matches the behaviour of the CMS.
 
 ## Available interfaces