Kill trailing whitespace in ruby files

test/functional/post_versions_controller_test.rb

@@ -7,25 +7,25 @@ class PostVersionsControllerTest < ActionController::TestCase
       CurrentUser.user = @user
       CurrentUser.ip_addr = "127.0.0.1"
     end
-    
+
     teardown do
       CurrentUser.user = nil
       CurrentUser.ip_addr = nil
     end
-    
+
     context "index action" do
       setup do
         @post = FactoryGirl.create(:post)
         @post.update_attributes(:tag_string => "1 2", :source => "xxx")
         @post.update_attributes(:tag_string => "2 3", :rating => "e")
       end
-      
+
       should "list all versions" do
         get :index
         assert_response :success
         assert_not_nil(assigns(:post_versions))
       end
-      
+
       should "list all versions that match the search criteria" do
         get :index, {:search => {:post_id => @post.id}}
         assert_response :success