Ticket #28627: 28627.2.diff

src/wp-admin/includes/revision.php

@@ -199 +199 @@
                         $current_id = $revision->ID;
                 }
 
-                $revisions[ $revision->ID ] = array(
+                $revisions_data = array(
                         'id'         => $revision->ID,
                         'title'      => get_the_title( $post->ID ),
                         'author'     => $authors[ $revision->post_author ],
@@ -210 +210 @@
                         'current'    => $current,
                         'restoreUrl' => $can_restore ? $restore_link : false,
                 );
+
+                /**
+                 * Filter the array of models used to load the revisions screen.
+                 *
+                 * @since 4.2.0
+                 *
+                 * @param array   $revisions_data The bootstrapped data for the revisions
+                 *                                screen Backbone Collection.
+                 * @param WP_Post $post           The revisions parent post object.
+                 */
+                $revisions[ $revision->ID ] = apply_filters( 'wp_prepare_revision_for_js', $revisions_data, $post );
+
         }
 
         /**