try fixing rbx

.travis.yml

@@ -1,6 +1,7 @@
 language: ruby
 rvm:
   - 1.9.3
+  - rbx-19mode
 before_script:
   - 'RAILS_ENV=test rake db:create db:schema:load --trace'
 notifications:

spec/support/matchers.rb

@@ -27,7 +27,7 @@ end
 RSpec::Matchers.define :deliver_result_image_for do |name|
   match do |response|
     actual = files.detect do |(name, content)|
-      response.body.force_encoding('ascii') == content.force_encoding('ascii') # TODO ummmmmmmm?
+      response.body.to_s.force_encoding('ascii') == content.to_s.force_encoding('ascii') # TODO ummmmmmmm?
     end
     actual = actual && actual[0]