Fix minor issue with HTML5 compat

main/inc/lib/course.lib.php

@@ -3861,7 +3861,7 @@ class CourseManager {
             //Description
             $my_course['extra_info']['description_button'] = '';
             if ($course_info['visibility'] == COURSE_VISIBILITY_OPEN_WORLD || in_array($course_info['real_id'], $my_course_code_list) ) {
-                $my_course['extra_info']['description_button'] = Display::url(get_lang('Description'), api_get_path(WEB_AJAX_PATH).'course_home.ajax.php?a=show_course_information&code='.$course_info['code'], array('class' => 'ajax btn'));
+                $my_course['extra_info']['description_button'] = Display::url(get_lang('Description'), api_get_path(WEB_AJAX_PATH).'course_home.ajax.php?a=show_course_information&code='.$course_info['code'], array('class' => 'ajax btn'));
             }
 
             $my_course['extra_info']['teachers'] = CourseManager::get_teacher_list_from_course_code_to_string($course_info['code']);
@@ -3973,4 +3973,4 @@ class CourseManager {
         }
         return $options;
     }
-}
+}