Fix formatting (#2808)

Author: kit1980

recipes_source/recipes/tuning_guide.py

@@ -464,7 +464,7 @@ def fused_gelu(x):
 # perform the required gradient all-reduce.
 
 ###############################################################################
-# Match the order of layers in constructors and during the execution if using ``DistributedDataParallel``(find_unused_parameters=True)
+# Match the order of layers in constructors and during the execution if using ``DistributedDataParallel(find_unused_parameters=True)``
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 # `torch.nn.parallel.DistributedDataParallel <https://pytorch.org/docs/stable/generated/torch.nn.parallel.DistributedDataParallel.html#torch.nn.parallel.DistributedDataParallel>`_
 # with ``find_unused_parameters=True`` uses the order of layers and parameters