Kill trailing whitespace in ruby files

test/unit/sources/pixa_test.rb

@@ -1,7 +1,7 @@
 # # encoding: UTF-8
-# 
+#
 # require 'test_helper'
-# 
+#
 # module Sources
 #   class PixaTest < ActiveSupport::TestCase
 #     context "The source site for pixa" do
@@ -9,26 +9,26 @@
 #         @site = Sources::Site.new("http://www.pixa.cc/illustrations/show/75575")
 #         @site.get
 #       end
-#       
+#
 #       should "get the profile" do
 #         assert_equal("http://www.pixa.cc/profiles/show/9191", @site.profile_url)
 #       end
-#       
+#
 #       should "get the artist name" do
 #         assert_equal("air", @site.artist_name)
 #       end
-#       
+#
 #       should "get the image url" do
 #         assert_equal("http://file0.pixa.cc/illustrations/34/cb/df/70/49/b4/52/2d/42/c6/middle/110910魔法少女のコピー.jpg?1315664621", @site.image_url)
 #       end
-#       
+#
 #       should "get the tags" do
 #         assert(@site.tags.size > 0)
 #         first_tag = @site.tags.first
 #         assert_equal(2, first_tag.size)
 #         assert(first_tag[0] =~ /./)
 #       end
-# 
+#
 #       should "convert a page into a json representation" do
 #         assert_nothing_raised do
 #           @site.to_json