apply new formatting config

Summary:
pyfmt now specifies a target Python version of 3.8 when formatting
with black. With this new config, black adds trailing commas to all
multiline function calls. This applies the new formatting as part
of rolling out the linttool-integration for pyfmt.

paintitblack

Reviewed By: zertosh, lisroach

Differential Revision: D37084377

fbshipit-source-id: 781a1b883a381a172e54d6e447137657977876b4

crypten/common/rng.py

@@ -23,7 +23,7 @@ def generate_random_ring_element(size, ring_size=(2**64), generator=None, **kwar
         size,
         generator=generator,
         dtype=torch.long,
-        **kwargs
+        **kwargs,
     )
     if rand_element.is_cuda:
         return CUDALongTensor(rand_element)