* test/openssl/test_cipher.rb: Correct a typo
  by jgls <joerg@joergleis.com>
  https://github.com/ruby/ruby/pull/291 fix GH-291

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40361 b2dd03c8-39d4-4d8f-98ff-823fe69b080e