MDL-34441 cleanup dtl related phpdocs and minor style improvements

lib/dtl/string_xml_database_exporter.php

@@ -1,5 +1,4 @@
 <?php
-
 // This file is part of Moodle - http://moodle.org/
 //
 // Moodle is free software: you can redistribute it and/or modify
@@ -15,12 +14,10 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-
 /**
  * XML format exporter class to memory storage
  *
- * @package    core
- * @subpackage dtl
+ * @package    core_dtl
  * @copyright  2008 Andrei Bautu
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
@@ -31,11 +28,12 @@ defined('MOODLE_INTERNAL') || die();
  * XML format exporter class to memory storage (i.e. a string).
  */
 class string_xml_database_exporter extends xml_database_exporter {
-    /** String with XML data. */
+    /** @var string String with XML data. */
     protected $data;
 
     /**
      * Specific output method for the memory XML sink.
+     * @param string $text
      */
     protected function output($text) {
         $this->data .= $text;