updated core to 7.73

modules/field_ui/field_ui.api.php

@@ -134,6 +134,9 @@ function hook_field_widget_settings_form($field, $instance) {
 /**
  * Specify the form elements for a formatter's settings.
  *
+ * This hook is only invoked if hook_field_formatter_settings_summary()
+ * returns a non-empty value.
+ *
  * @param $field
  *   The field structure being configured.
  * @param $instance