From 83d148242a573f48011b5de3de4f7532db45effa Mon Sep 17 00:00:00 2001
From: Toshi MARUYAMA <marutosijp2@yahoo.co.jp>
Date: Tue, 21 May 2013 07:11:25 +0000
Subject: [PATCH] fix back-button on description diff page in case of no
 browser history (#13697)

Contributed by Filou Centrinov.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11893 e93f8b46-1217-0410-a6f0-8f06a7374b81
---
 app/views/journals/diff.html.erb | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/views/journals/diff.html.erb b/app/views/journals/diff.html.erb
index 21b8755e7..4d425f378 100644
--- a/app/views/journals/diff.html.erb
+++ b/app/views/journals/diff.html.erb
@@ -5,6 +5,9 @@
 <%= simple_format_without_paragraph @diff.to_html %>
 </div>
 
-<p><%= link_to l(:button_back), issue_path(@issue), :onclick => 'history.back(); return false;' %></p>
+<p>
+  <%= link_to(l(:button_back), issue_path(@issue),
+              :onclick => 'if (history.length > 1) {history.back(); return false;}') %>
+</p>
 
 <% html_title "#{@issue.tracker.name} ##{@issue.id}: #{@issue.subject}" %>
-- 
2.39.5