private static function show_default_error($error_data) {
	$template_path    = \alsvanzelf\fem\ROOT_DIR.'vendor/alsvanzelf/fem/src/templates/default_error.html';
	$template_content = file_get_contents($template_path);
	
	$renderer = new \Mustache_Engine();
	echo $renderer->render($template_content, $error_data);
}
private static function show_default_error($error_data) {
	$template_path    = \alsvanzelf\fem\ROOT_DIR.'vendor/alsvanzelf/fem/src/templates/default_error.html';
	$template_content = file_get_contents($template_path);
	
	$renderer = new \Mustache_Engine();
	echo $renderer->render($template_content, $error_data);
}
private static function show_default_error ( $ error_data ) { $ template_path = \ alsvanzelf \ fem \ ROOT_DIR . 'vendor/alsvanzelf/fem/src/templates/default_error.html' ; $ template_content = file_get_contents ( $ template_path ) ; $ renderer = new \ Mustache_Engine ( ) ; echo $ renderer -> render ( $ template_content , $ error_data ) ; }
shows a default error template in case no specific one is set

@param  array $error_data as build up in ::error()
@return void              however, mustache has echo'd the html
shows a default error template in case no specific one is set