MAINT: replace promises by await

src/core/js/ext_editmode_wysiwyg_text.js

@@ -46,9 +46,7 @@ var ext_editmode_wysiwyg_text = function ($, logger, ClassicEditor, edit_mode, g
         }
 
         try{
-            let editor;
-
-            editor = await ClassicEditor
+            const editor = await ClassicEditor
                 .create(prop.querySelector('textarea'), {
                     // use all plugins since we built the editor dependency to
                     // contain only those we need.