Kill trailing whitespace in ruby files

test/functional/pool_elements_controller_test.rb

@@ -10,18 +10,18 @@ class PoolElementsControllerTest < ActionController::TestCase
       @post = FactoryGirl.create(:post)
       @pool = FactoryGirl.create(:pool, :name => "abc")
     end
-    
+
     teardown do
       CurrentUser.user = nil
     end
-    
+
     context "create action" do
       should "add a post to a pool" do
         post :create, {:pool_id => @pool.id, :post_id => @post.id, :format => "json"}, {:user_id => @user.id}
         @pool.reload
         assert_equal([@post.id], @pool.post_id_array)
       end
-      
+
       should "add a post to a pool once and only once" do
         @pool.add!(@post)
         post :create, {:pool_id => @pool.id, :post_id => @post.id, :format => "json"}, {:user_id => @user.id}
@@ -29,18 +29,18 @@ class PoolElementsControllerTest < ActionController::TestCase
         assert_equal([@post.id], @pool.post_id_array)
       end
     end
-    
+
     context "destroy action" do
       setup do
         @pool.add!(@post)
       end
-      
+
       should "remove a post from a pool" do
         post :destroy, {:pool_id => @pool.id, :post_id => @post.id, :format => "json"}, {:user_id => @user.id}
         @pool.reload
         assert_equal([], @pool.post_id_array)
       end
-      
+
       should "do nothing if the post is not a member of the pool" do
         @pool.remove!(@post)
         post :destroy, {:pool_id => @pool.id, :post_id => @post.id, :format => "json"}, {:user_id => @user.id}