Adds noindex,noarchive robots meta tag on form pages (#7582).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5443 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/wiki/edit.rhtml

@@ -23,6 +23,7 @@
 
 <% content_for :header_tags do %>
   <%= stylesheet_link_tag 'scm' %>
+  <%= robot_exclusion_tag %>
 <% end %>
 
 <% html_title @page.pretty_title %>