Issue #3268174 by Wim Leers, nod_, catch, lauriii: Bug in CKE 4 → 5 upgrade...
Issue #3268174 by Wim Leers, nod_, catch, lauriii: Bug in CKE 4 → 5 upgrade path "format" does not always map to "heading", it could map to "codeBlock" too, or both, or neither
(cherry picked from commit 196b68e9)
thrownew\LogicException(sprintf('The "%s" CKEditor4To5Upgrade plugin claims to provide an upgrade path for the "%s" CKEditor 4 button but does not.',$plugin_id,$cke4_button));
$messages[]=$this->t('The CKEditor 4 button %button does not have a known upgrade path. If it allowed editing markup, then you can do so now through the Source Editing functionality.',[
@@ -235,7 +238,7 @@ private function createSettingsFromCKEditor4(array $ckeditor4_settings, array $e