Fixed #11274 -- Corrected doctests to not cause test failures due to missing...

>>> qs = Author.objects.filter(pk__in=subq)

>>> list(qs)

[<Author: a1>, <Author: a2>]

# The subquery result cache should not be populated

>>> subq._result_cache is None

True

>>> qs = Author.objects.exclude(pk__in=subq)

>>> list(qs)

[<Author: a3>, <Author: a4>]

# The subquery result cache should not be populated

>>> subq._result_cache is None

True

>>> subq = Author.objects.filter(num__lt=3000)

>>> list(Author.objects.filter(Q(pk__in=subq) & Q(name='a1')))

[<Author: a1>]

# The subquery result cache should not be populated

>>> subq._result_cache is None

True