diff --git a/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php
index 13d2a34..0dd8e2f 100644
--- a/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php
@@ -81,9 +81,10 @@ public function onViewRenderArray(GetResponseForControllerResultEvent $event) {
     // Render the controller result into a response if it's a render array.
     if (is_array($result)) {
       // We default to requestFormat() because content negotiation uses this as
-      // its fallback method when format matching fails to match a route to
-      // display a 406.
-      // TODO - This logic should be replaced in https://www.drupal.org/node/2364011 with a more clear opt in to avoid cache poisoning.
+      // its fallback method for displaying a 406 when we fail to match a route
+      // based on format.
+      // @todo this logic should be replaced with a more clear opt in to avoid
+      //    cache poisoning. https://www.drupal.org/node/2364011
       $wrapper = $request->query->get(static::WRAPPER_ENVELOPE, $request->getRequestFormat());
       if (isset($this->mainContentRenderers[$wrapper])) {
         $renderer = $this->classResolver->getInstanceFromDefinition($this->mainContentRenderers[$wrapper]);