dev#160166 : CkEditor placeholders plugin

This plugin adds 2 buttons (records and articles) that print a corresponding placeholder. [newsletter_records] is replaced with biblio records linked to the newsletter. [newsletter_articles] is replaced with articles linked to the newsletter.

tests/application/modules/admin/controllers/NewsletterControllerTest.php

@@ -1014,6 +1014,7 @@ abstract class Admin_NewsletterControllerPreviewActionTestCase
 
 
 
+
 abstract class Admin_NewsletterControllerPreviewActionPlaceHoldersTestCase extends Admin_NewsletterControllerPreviewActionTestCase{
   protected Class_Newsletter $_newsletter;
   protected string $_file_path = '';
@@ -1089,7 +1090,6 @@ abstract class Admin_NewsletterControllerPreviewActionPlaceHoldersTestCase exten
 
 
 
-
 class Admin_NewsletterControllerPreviewActionWithArticlesSelectionAndPlaceHoldersAsTextTest
   extends Admin_NewsletterControllerPreviewActionPlaceHoldersTestCase {
 
@@ -1122,6 +1122,7 @@ class Admin_NewsletterControllerPreviewActionWithPlaceHoldersWithoutCatalogueTes
 
 
 
+
 class Admin_NewsletterControllerPreviewActionWithPlaceholdersWithoutArticlesTest
   extends Admin_NewsletterControllerPreviewActionPlaceHoldersTestCase {