Black preview (#17217)

* Black preview

* Fixup too!

* Fix check copies

* Use the same version as the CI

* Bump black

examples/research_projects/distillation/grouped_batch_sampler.py

@@ -60,7 +60,7 @@ class GroupedBatchSampler(BatchSampler):
     def __init__(self, sampler, group_ids, batch_size):
         if not isinstance(sampler, Sampler):
             raise ValueError(
-                "sampler should be an instance of " "torch.utils.data.Sampler, but got sampler={}".format(sampler)
+                "sampler should be an instance of torch.utils.data.Sampler, but got sampler={}".format(sampler)
             )
         self.sampler = sampler
         self.group_ids = group_ids