New method. (OpenSSL::X509::Certificate#pretty_print): Ditto. * ext/openssl/lib/openssl/bn.rb (OpenSSL::BN#pretty_print): Ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47647 b2dd03c8-39d4-4d8f-98ff-823fe69b080e