From d661b893c55577f1b781cf96c211765c4586b945 Mon Sep 17 00:00:00 2001
From: Riyad Preukschas <riyad@informatik.uni-bremen.de>
Date: Sat, 8 Sep 2012 01:58:12 +0200
Subject: [PATCH] Prevent gfm() to leak changes to the string supplied through
 the _text_ argument

---
 lib/gitlab/markdown.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/gitlab/markdown.rb b/lib/gitlab/markdown.rb
index f9125e0390a..4fc0c392cac 100644
--- a/lib/gitlab/markdown.rb
+++ b/lib/gitlab/markdown.rb
@@ -48,6 +48,9 @@ module Gitlab
     def gfm(text, html_options = {})
       return text if text.nil?
 
+      # prevents the string supplied through the _text_ argument to be altered
+      text = text.dup
+
       @html_options = html_options
 
       # Extract pre blocks so they are not altered