Issue #2031385 by Wim Leers: Fixed Editor's in-place editing AJAX endpoint broken.

core/modules/editor/editor.routing.yml

@@ -1,5 +1,5 @@
 editor_field_untransformed_text:
-  pattern: '/editor/{entity_type}/{entity}/{field_name}/{langcode}/{view_mode}'
+  pattern: '/editor/{entity_type}/{entity}/{field_name}/{langcode}/{view_mode_id}'
   defaults:
     _controller: '\Drupal\editor\EditorController::getUntransformedText'
   requirements:

core/modules/editor/lib/Drupal/editor/EditorController.php

@@ -32,13 +32,13 @@ class EditorController extends ContainerAware {
    * @param string $langcode
    *   The name of the language for which the processed text field is being
    *   rererendered.
-   * @param string $view_mode
+   * @param string $view_mode_id
    *   The view mode the processed text field should be rerendered in.
    *
    * @return \Drupal\Core\Ajax\AjaxResponse
    *   The Ajax response.
    */
-  public function getUntransformedText(EntityInterface $entity, $field_name, $langcode, $view_mode) {
+  public function getUntransformedText(EntityInterface $entity, $field_name, $langcode, $view_mode_id) {
     $response = new AjaxResponse();
 
     // Direct text editing is only supported for single-valued fields.