From 6aec17bd006e91bfe11bd0d06c7544f2cec7bb95 Mon Sep 17 00:00:00 2001
From: Vadim Dvorovenko <Vadimon@mail.ru>
Date: Fri, 23 Jan 2015 09:49:46 +0700
Subject: [PATCH] MDL-48955 filter_mathjax: Regexp fix for
 texfiltercompatibility mode

Fixing incorrect regexp for replacing text like
"$$a$$ and $$b$$" to "\(a\) and \(b\)". This is needed for
texfiltercompatibility to work as expected.
---
 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 2d6abb2831f..3726c95dd45 100644
--- a/filter/mathjaxloader/filter.php
+++ b/filter/mathjaxloader/filter.php
@@ -143,7 +143,7 @@ class filter_mathjaxloader extends moodle_text_filter {
             $text = str_replace('[tex]', '\\(', $text);
             $text = str_replace('[/tex]', '\\)', $text);
             // E.g. "$$ blah $$".
-            $text = preg_replace('|\$\$[\S\s]\$\$|u', '\\(\1\\)', $text);
+            $text = preg_replace('|\$\$([\S\s]*?)\$\$|u', '\\(\1\\)', $text);
             // E.g. "\[ blah \]".
             $text = str_replace('\\[', '\\(', $text);
             $text = str_replace('\\]', '\\)', $text);