Sanitize image links and handle nils in the toc formatter. #5445

Based on contribution by Yuki Kita.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3811 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/helpers/application_helper_test.rb

@@ -421,6 +421,9 @@ h2. Subtitle with %{color:red}red text%
 h1. Another title
 
 h2. An "Internet link":http://www.redmine.org/ inside subtitle
+
+h2. "Project Name !/attachments/1234/logo_small.gif! !/attachments/5678/logo_2.png!":/projects/projectname/issues
+
 RAW
 
     expected = '<ul class="toc">' +
@@ -430,8 +433,9 @@ RAW
                '<li class="heading2"><a href="#Subtitle-with-red-text">Subtitle with red text</a></li>' +
                '<li class="heading1"><a href="#Another-title">Another title</a></li>' +
                '<li class="heading2"><a href="#An-Internet-link-inside-subtitle">An Internet link inside subtitle</a></li>' +
+               '<li class="heading2"><a href="#Project-Name">Project Name</a></li>' +
                '</ul>'
-               
+
     assert textilizable(raw).gsub("\n", "").include?(expected)
   end