Added link_to_issue helper.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@431 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/projects/changelog.rhtml

@@ -25,6 +25,6 @@
     <ul>
     <% ver_id = issue.fixed_version_id
     end %>
-    <li><%= link_to "#{issue.tracker.name} #{issue.id}", :controller => 'issues', :action => 'show', :id => issue %>: <%=h issue.subject %></li>
+    <li><%= link_to_issue issue %>: <%=h issue.subject %></li>
 <% end %>
 </div>