Buffering#each_byte should return String in accordance with IO in 1.9. * test/openssl/test_buffering.rb (class OpenSSL): add tests for getc and each_byte. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32012 b2dd03c8-39d4-4d8f-98ff-823fe69b080e