improve comments in php code

Author: Menrath

locallib.php

@@ -52,15 +52,15 @@ function theme_boost_union_get_course_related_hints() {
 
         // The general hint will only be shown when the course is viewed.
         if ($PAGE->url->compare(new moodle_url('/course/view.php'), URL_MATCH_BASE)) {
-            // Prepare template context.
+            // Use the default hint text for hidden courses.
             $hintcoursehiddentext = get_string('showhintcoursehiddengeneral', 'theme_boost_union');
         }
 
         // If the setting showhintcoursehiddennotifications is set too and we view a forum (e.g. announcement) within a hidden
         // course a hint will be shown that no notifications via forums will be sent out to students.
         if (get_config('theme_boost_union', 'showhintforumnotifications') == THEME_BOOST_UNION_SETTING_SELECT_YES
                 && $PAGE->url->compare(new moodle_url('/mod/forum/view.php'), URL_MATCH_BASE)) {
-
+            // Use the specialized hint text for hidden courses on forum pages.
             $hintcoursehiddentext = get_string('showhintforumnotifications', 'theme_boost_union');
         }