ACP2E-2647: Scheduling Product updates clean multiselect attributes with ArrayBackend backend

Author: Anna Bukatar

app/code/Magento/Eav/Model/Entity/Attribute/Backend/ArrayBackend.php

@@ -58,14 +58,18 @@ public function validate($object)
 
     /**
      * Prepare attribute values
+     *
+     * @param array $data
+     * @return string
      */
     private function prepare(array $data): string
     {
         return implode(
             ',',
             array_filter(
                 array_unique($data),
-                fn($value) => is_numeric($value) || !empty($value))
+                fn($value) => is_numeric($value) || !empty($value)
+            )
         );
     }
 }