Ruby

test_get_ephemeral_key: use assert_instance_of

• test/openssl/test_ssl.rb (test_get_ephemeral_key): should use
  assert_instance_of instead of comparison of classes.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54487 b2dd03c8-39d4-4d8f-98ff-823fe69b080e