Allow fetching default configuration object settings
Closes #3364285
Made change to BaseParser::getRenderStrategy(), so it should provide the default configuration object settings when the default instantiated plugin object does not provide a configuration array.
/**
* {@inheritdoc}
*/
public function getRenderStrategy() {
$id = $this->config()->get('id');
$renderStrategy = $this->config()->get('render_strategy.type') ?: \Drupal::config("markdown.parser.$id")->get('render_strategy.type');
return $renderStrategy ?: static::FILTER_OUTPUT;
}