Namespaces state machines create unnamespaced scopes

[armchairdj]

Describe the bug

When creating a state machine with a namespace and create_scopes: true, I would expect the automatically created scopes to be prepended with the namespace. But they're not.

For example, with this state machine:

aasm column: :final_targeting_state, namespace: :final_targeting, create_scopes: true do
  state :unstarted, initial: true
  state :started
  state :succeeded
  state :failed
end

I would expect the class to respond to:

• klass.final_targeting_unstarted
• klass.final_targeting_started
• klass.final_targeting_succeeded
• klass.final_targeting_failed

But it doesn't. It responds to:

• klass.unstarted
• klass.started
• klass.succeeded
• klass.failed

This is different from the issue with double-creating method names in both their unnamespaced and namespaced versions. Here, it's not that two versions of each scope get created, namespaced & unnamespaced. It's that only one version gets created, and it's not the one I'd expect.

Expected behavior

I'd expect namespaces to be reflected in automatic scope names.

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Additional context
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[caiohsramos]

Do you guys mind if I take this one? I can start working on a PR