core/modules/comment/comment.module                                |    4 ++--
 .../Plugin/Field/FieldFormatter/CommentDefaultFormatter.php        |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index a2956db..fa38bfb 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -1733,7 +1733,7 @@ function comment_library_info() {
 }
 
 /**
- * #post_render_cache callback; inserts the comment form.
+ * #post_render_cache callback; replaces the placeholder with the comment form.
  *
  * @param array $context
  *   An array with the following keys:
@@ -1744,7 +1744,7 @@ function comment_library_info() {
  * @return array $element
  *   The updated $element.
  */
-function comment_insert_form(array $context) {
+function comment_replace_form_placeholder(array $context) {
   $entity = entity_load($context['entity_type'], $context['entity_id']);
   return comment_add($entity, $context['field_name']);
 }
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php b/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
index d9b4a6d..be1b6db 100644
--- a/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/Field/FieldFormatter/CommentDefaultFormatter.php
@@ -148,7 +148,7 @@ public function viewElements(FieldItemListInterface $items) {
           else {
             $output['comment_form'] = array(
               '#type' => 'render_cache_placeholder',
-              '#callback' => 'comment_insert_form',
+              '#callback' => 'comment_replace_form_placeholder',
               '#context' => array(
                 'entity_type' => $entity->entityType(),
                 'entity_id' => $entity->id(),