Subscription name is not optional

[Draiken]

https://github.com/GoogleCloudPlatform/gcloud-ruby/blob/v0.11.0/lib/gcloud/pubsub/topic.rb#L94-L141

The example says we can leave out the name and get a generated name, but the method requires a name.

It's also not a good example, since we give name my-topic-sub and get name generated-sub-name

[Draiken]

Nevermind... duplicate of #193

[blowmage]

Hi @Draiken, thanks for opening this issue. We thought we had removed that example from the documentation when we discovered the discrepancy between the official API documentation and the API behavior. That is very confusing. I'm sorry for that. We will get the documentation updated.

[blowmage]

@quartzmo Can you make sure the documentation is correct?

[quartzmo]

Yes, I'll look into it.