Broken tests on actionpack

When tests run on actionpack (Rails 509f3d7) gives you following errors

3) Error:
test_generates_a_new_details_key_for_each_details_hash(LookupContextTest):
NoMethodError: undefined method size' for :html:Symbol<br/>

/Users/anil/Code/rails/rails/actionpack/lib/action_view/lookup_context.rb:149:in `formats='

4) Error:
test_provides_getters_and_setters_for_formats(LookupContextTest):
NoMethodError: undefined method size' for :html:Symbol<br/>

/Users/anil/Code/rails/rails/actionpack/lib/action_view/lookup_context.rb:149:in `formats='

5) Error:
test_rjs_type_skips_layout(RespondToControllerTest):
NoMethodError: undefined method size' for :js:Symbol<br/>

/Users/anil/Code/rails/rails/actionpack/lib/action_view/lookup_context.rb:149:in `formats='

Attaching a patch which fixes it.