Cop idea: FactoryBot trait usage style in nested factories

[pirj]

Traits can be used in nested factories in two different ways.

Explicitly (and unambiguously):

factory :word do
  letters { "bar" }
  type { "noun" }

  trait :article do
    type { :article }
  end

  factory :the, traits: [:article] do
    letters { "the" }
  end

Another way, as implicit attributes is ambiguous:

factory :word do
  letters { "bar" }
  type { "noun" }

  trait :article do
    type { :article }
  end

  factory :the do
    article # association or a trait?
    letters { "the" }
  end

Unless we parse traits in context, it's hard to understand if article is an association or a trait.
With factory :verb, parent: :word placed in a separate file, this is getting impossible.