Kill trailing whitespace in ruby files

app/models/pool_version.rb

@@ -1,6 +1,6 @@
 class PoolVersion < ActiveRecord::Base
   class Error < Exception ; end
-  
+
   validates_presence_of :updater_id, :updater_ip_addr
   belongs_to :pool
   belongs_to :updater, :class_name => "User"
@@ -10,38 +10,38 @@ class PoolVersion < ActiveRecord::Base
     def for_user(user_id)
       where("updater_id = ?", user_id)
     end
-    
+
     def search(params)
       q = scoped
       return q if params.blank?
-      
+
       if params[:updater_id].present?
         q = q.for_user(params[:updater_id].to_i)
       end
-      
+
       if params[:updater_name].present?
         q = q.where("updater_id = (select _.id from users _ where lower(_.name) = ?)", params[:updater_name].downcase)
       end
-      
+
       if params[:pool_id].present?
         q = q.where("pool_id = ?", params[:pool_id].to_i)
       end
-      
+
       q
     end
   end
-  
+
   extend SearchMethods
-  
+
   def updater_name
     User.id_to_name(updater_id)
   end
-  
+
   def initialize_updater
     self.updater_id = CurrentUser.id
     self.updater_ip_addr = CurrentUser.ip_addr
   end
-  
+
   def post_id_array
     @post_id_array ||= post_ids.scan(/\d+/).map(&:to_i)
   end