MDL-38055 course: fixed double encoding of title properties

blocks/course_overview/renderer.php

@@ -101,7 +101,8 @@ class block_course_overview_renderer extends plugin_renderer_base {
 
             }
 
-            $attributes = array('title' => s($course->fullname));
+            // No need to pass title through s() here as it will be done automatically by html_writer.
+            $attributes = array('title' => $course->fullname);
             if ($course->id > 0) {
                 $courseurl = new moodle_url('/course/view.php', array('id' => $course->id));
                 $coursefullname = format_string($course->fullname, true, $course->id);