Revert "MDL-46814 calendar export: Minor coding tweaks"

This reverts commit 0b956a64d8.

calendar/classes/export_form.php

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
+/*
  * The mform for exporting calendar events
  *
  * @package core_calendar
@@ -22,13 +22,16 @@
  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
 
 // Always include formslib.
+if (!defined('MOODLE_INTERNAL')) {
+    die('Direct access to this script is forbidden.');    // It must be included from a Moodle page.
+}
+
 require_once($CFG->dirroot.'/lib/formslib.php');
 
 /**
- * The mform class for exporting a calendar
+ * The mform class for creating and editing a calendar
  *
  * @copyright 2014 Brian Barnes
  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
@@ -84,4 +87,4 @@ class core_calendar_export_form extends moodleform {
         $buttons[] = $mform->createElement('submit', 'export', get_string('exportbutton', 'calendar'));
         $mform->addGroup($buttons);
     }
-}
+}