COMMIT Fix for IO spec from nagachika.	http://github.com/rubyspec/rubyspec/commit/ed6b82e13e5990df49adce460cb311b9231dabfa
COMMIT Use preferred MIME name (canonical Ruby name).	http://github.com/rubyspec/rubyspec/commit/7e4546e9c53afa0e5414fcb7cd7f2ed9467a9d04