Kill trailing whitespace in ruby files

test/unit/post_vote_test.rb

@@ -6,21 +6,21 @@ class PostVoteTest < ActiveSupport::TestCase
     CurrentUser.user = user
     CurrentUser.ip_addr = "127.0.0.1"
     MEMCACHE.flush_all
-    
+
     @post = FactoryGirl.create(:post)
   end
-  
+
   context "Voting for a post" do
     should "interpret up as +1 score" do
       vote = PostVote.create(:post_id => @post.id, :score => "up")
       assert_equal(1, vote.score)
     end
-    
+
     should "interpret down as -1 score" do
       vote = PostVote.create(:post_id => @post.id, :score => "down")
       assert_equal(-1, vote.score)
     end
-    
+
     should "not accept any other scores" do
       vote = PostVote.create(:post_id => @post.id, :score => "xxx")
       assert(vote.errors.any?)