From dbf9bf0dab56674dd333aad0169e9050fe3d13d1 Mon Sep 17 00:00:00 2001
From: Henning Bostelmann <henning.bostelmann@york.ac.uk>
Date: Thu, 18 Aug 2016 17:01:12 +0100
Subject: [PATCH] MDL-55627 filter_mathjaxloader: use correct string
 concatenation op

---
 filter/mathjaxloader/filter.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/filter/mathjaxloader/filter.php b/filter/mathjaxloader/filter.php
index c5428c804eb..ee07a96e2c7 100644
--- a/filter/mathjaxloader/filter.php
+++ b/filter/mathjaxloader/filter.php
@@ -165,7 +165,7 @@ class filter_mathjaxloader extends moodle_text_filter {
             $PAGE->requires->yui_module('moodle-filter_mathjaxloader-loader', 'M.filter_mathjaxloader.typeset');
             if ($hasextra) {
                 // If custom dilimeters are used, wrap whole text to prevent autolinking.
-                $text = '<span class="nolink">' + $text + '</span>';
+                $text = '<span class="nolink">' . $text . '</span>';
             } else {
                 if ($hasinline) {
                     // If the default inline TeX delimiters \( \) are present, wrap each pair in nolink.