Escaping in html email templates (#4874).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3452 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/mailer/issue_add.text.html.rhtml

@@ -1,3 +1,3 @@
-<%= l(:text_issue_added, :id => "##{@issue.id}", :author => @issue.author) %>
+<%= l(:text_issue_added, :id => "##{@issue.id}", :author => h(@issue.author)) %>
 <hr />
 <%= render :partial => "issue_text_html", :locals => { :issue => @issue, :issue_url => @issue_url } %>