[#423] Removed explicit render in WikiController#show

* Allows for format extensions in plugins w/o giving a double-render
  error
* Updated Wiki#show template to specify 'wiki/sidebar' explicitly
  (vs. just 'sidebar')

app/controllers/wiki_controller.rb

@@ -82,7 +82,6 @@ class WikiController < ApplicationController
       end
     end
     @editable = editable?
-    render :action => 'show'
   end
   
   # edit an existing page or a new one

app/views/wiki/show.rhtml

@@ -57,7 +57,7 @@
 <% end %>
 
 <% content_for :sidebar do %>
-  <%= render :partial => 'sidebar' %>
+  <%= render :partial => 'wiki/sidebar' %>
 <% end %>
 
 <% html_title @page.pretty_title %>