MDL-45172 block_completionstatus: added a check for an empty string b…

…efore appending

blocks/completionstatus/block_completionstatus.php

@@ -234,7 +234,6 @@ public function get_content() {
 
             // Display link to detailed view.
             $details = new moodle_url('/blocks/completionstatus/details.php', array('course' => $course->id));
-            $this->content->footer = html_writer::empty_tag('br');
             $this->content->footer = html_writer::link($details, get_string('moredetails', 'completion'));
         } else {
             // If user is not enrolled, show error.
@@ -243,6 +242,9 @@ public function get_content() {
 
         if (has_capability('report/completion:view', $context)) {
             $report = new moodle_url('/report/completion/index.php', array('course' => $course->id));
+            if (empty($this->content->footer)) {
+                $this->content->footer = '';
+            }
             $this->content->footer .= html_writer::empty_tag('br');
             $this->content->footer .= html_writer::link($report, get_string('viewcoursereport', 'completion'));
         }