Extracts a diff helper from the WikiDiff class.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4952 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/wiki/diff.rhtml

@@ -12,6 +12,6 @@
 <em>(<%= @diff.content_to.author ? @diff.content_to.author.name : "anonyme" %>, <%= format_time(@diff.content_to.updated_on) %>)</em>
 </p>
 
-<hr />
-
-<%= html_diff(@diff) %>
+<div class="text-diff">
+<%= @diff.to_html %>
+</div>