Kill trailing whitespace in ruby files

test/functional/advertisements_controller_test.rb

@@ -6,27 +6,27 @@ class AdvertisementsControllerTest < ActionController::TestCase
       @ad = FactoryGirl.create(:advertisement)
       @advertiser = FactoryGirl.create(:admin_user)
     end
-    
+
     should "get the new page" do
       get :new, {}, {:user_id => @advertiser.id}
       assert_response :success
     end
-    
+
     should "get the edit page" do
       get :edit, {:id => @ad.id}, {:user_id => @advertiser.id}
       assert_response :success
     end
-    
+
     should "get the index page" do
       get :index, {}, {:user_id => @advertiser.id}
       assert_response :success
     end
-    
+
     should "get the show page" do
       get :show, {:id => @ad.id}, {:user_id => @advertiser.id}
       assert_response :success
     end
-    
+
     should "create an ad" do
       assert_difference("Advertisement.count", 1) do
         post :create, {:advertisement => FactoryGirl.attributes_for(:advertisement)}, {:user_id => @advertiser.id}
@@ -34,21 +34,21 @@ class AdvertisementsControllerTest < ActionController::TestCase
       ad = Advertisement.last
       assert_redirected_to(advertisement_path(ad))
     end
-    
+
     should "update an ad" do
       post :update, {:id => @ad.id, :advertisement => {:width => 100}}, {:user_id => @advertiser.id}
       ad = Advertisement.last
       assert_equal(100, ad.width)
       assert_redirected_to(advertisement_path(ad))
     end
-    
+
     should "delete an ad" do
       assert_difference("Advertisement.count", -1) do
         post :destroy, {:id => @ad.id}, {:user_id => @advertiser.id}
       end
       assert_redirected_to(advertisements_path)
     end
-    
+
     should "block non-advertisers" do
       regular_user = FactoryGirl.create(:user)
       get :index, {}, {:user_id => regular_user.id}