Kill trailing whitespace in ruby files

test/functional/posts_controller_test.rb

@@ -9,18 +9,18 @@ class PostsControllerTest < ActionController::TestCase
       @post = FactoryGirl.create(:post, :uploader_id => @user.id, :tag_string => "aaaa")
       MEMCACHE.flush_all
     end
-    
+
     teardown do
       CurrentUser.user = nil
       CurrentUser.ip_addr = nil
     end
-    
+
     context "index action" do
       should "render" do
         get :index
         assert_response :success
       end
-      
+
       context "with a search" do
         should "render" do
           get :index, {:tags => "aaaa"}
@@ -28,29 +28,29 @@ class PostsControllerTest < ActionController::TestCase
         end
       end
     end
-    
+
     context "show action" do
       should "render" do
         get :show, {:id => @post.id}
         assert_response :success
       end
     end
-    
+
     context "update action" do
       should "work" do
         post :update, {:id => @post.id, :post => {:tag_string => "bbb"}}, {:user_id => @user.id}
         assert_redirected_to post_path(@post)
-        
+
         @post.reload
         assert_equal("bbb", @post.tag_string)
       end
     end
-    
+
     context "revert action" do
       setup do
         @post.update_attributes(:tag_string => "zzz")
       end
-      
+
       should "work" do
         @version = @post.versions(true).first
         assert_equal("aaaa", @version.tags)