[Fix] fix gramma error in PyTorch docs (pytorch#166158)

Fix several gramma errors in PyTorch docs.
Pull Request resolved: pytorch#166158
Approved by: https://github.com/yewentao256, https://github.com/cyyever, https://github.com/ezyang

Author: lingebeng

docs/cpp/source/index.rst

@@ -14,7 +14,7 @@ Combining, these building blocks form a research and
 production ready C++ library for tensor computation and dynamic neural
 networks with strong emphasis on GPU acceleration as well as fast CPU
 performance. It is currently in use at Facebook in research and
-production; we are looking forward to welcome more users of the PyTorch C++ API.
+production; we are looking forward to welcoming more users of the PyTorch C++ API.
 
 .. warning::
 

docs/cpp/source/notes/inference_mode.rst

@@ -64,7 +64,7 @@ users should pay additional attention to:
 
   - Both guards affects tensor execution process to skip work not related to inference, but ``InferenceMode``
     also affects tensor creation while ``AutoNonVariableTypeMode`` doesn't. In other words, tensors created
-    inside ``InferenceMode`` are marked as inference tensors so that certain limitation can be applied after
+    inside ``InferenceMode`` are marked as inference tensors so that certain limitations can be applied after
     exiting ``InferenceMode``.
   - Enabled/disabled ``InferenceMode`` states can be nested while ``AutoNonVariableTypeMode`` only allows enabled state.
 

docs/source/checkpoint.md

@@ -17,7 +17,7 @@ restoring the RNG state during each checkpoint.
 The stashing logic saves and restores the RNG state for CPU and another
 device type (infer the device type from Tensor arguments excluding CPU
 tensors by `_infer_device_type`) to the `run_fn`. If there are multiple
-device, device state will only be saved for devices of a single device type,
+devices, device state will only be saved for devices of a single device type,
 and the remaining devices will be ignored. Consequently, if any checkpointed
 functions involve randomness, this may result in incorrect gradients. (Note
 that if CUDA devices are among the devices detected, it will be prioritized;

docs/source/distributed.md

@@ -59,14 +59,14 @@ MPI supports CUDA only if the implementation used to build PyTorch supports it.
 
 ### Backends that come with PyTorch
 
-PyTorch distributed package supports Linux (stable), MacOS (stable), and Windows (prototype).
+PyTorch distributed package supports Linux (stable), macOS (stable), and Windows (prototype).
 By default for Linux, the Gloo and NCCL backends are built and included in PyTorch
 distributed (NCCL only when building with CUDA). MPI is an optional backend that can only be
 included if you build PyTorch from source. (e.g. building PyTorch on a host that has MPI
 installed.)
 
 :::{note}
-As of PyTorch v1.8, Windows supports all collective communications backend but NCCL,
+As of PyTorch v1.8, Windows supports all collective communications backends but NCCL,
 If the `init_method` argument of {func}`init_process_group` points to a file it must adhere
 to the following schema:
 

docs/source/mtia.md

@@ -1,6 +1,6 @@
 # torch.mtia
 
-The MTIA backend is implemented out of the tree, only interfaces are be defined here.
+The MTIA backend is implemented out of the tree, only interfaces are defined here.
 
 ```{eval-rst}
 .. automodule:: torch.mtia

docs/source/mtia.memory.md

@@ -1,6 +1,6 @@
 # torch.mtia.memory
 
-The MTIA backend is implemented out of the tree, only interfaces are be defined here.
+The MTIA backend is implemented out of the tree, only interfaces are defined here.
 
 ```{eval-rst}
 .. automodule:: torch.mtia.memory