Paths added with format_suffix_patterns aren't excluded from OpenAPI schema

[taasan]

djangorestframework: 3.13.1
django: 3.1.14

urlpatterns = format_suffix_patterns([
    path('stats', views.Stats.as_view()),
])

By the time this reaches EndpointEnumerator.should_include_endpoint path is /stats{format}, not /stats.{format} and it's not excluded.

class EndpointEnumerator:
    ...
    def should_include_endpoint(self, path, callback):
        ...
        if path.endswith('.{format}') or path.endswith('.{format}/'):
            return False  # Ignore .json style URLs.
        ...

[atereshkin]

This is still there in 3.14.0 and leads to duplicate endpoints in generated OpenAPI schema.