Fix all the trailing whitespace

app/controllers/clicks_controller.rb

@@ -1,9 +1,9 @@
 class ClicksController < ApplicationController
 
   skip_before_filter :check_xhr
-  
+
   def track
-    requires_parameter(:url)   
+    requires_parameter(:url)
     if params[:topic_id].present? or params[:post_id].present?
       args = {url: params[:url], ip: request.remote_ip}
       args[:user_id] = current_user.id if current_user.present?
@@ -22,4 +22,4 @@ class ClicksController < ApplicationController
     end
   end
 
-end
+end