Forward fix lint (#2197)

* Forward fix lint

* added some minor docs

* Update CONTRIBUTING.md

Co-authored-by: Copilot <[email protected]>

---------

Co-authored-by: Copilot <[email protected]>

Author: msaroufim

CONTRIBUTING.md

@@ -2,9 +2,6 @@
 We want to make contributing to this project as easy and transparent as
 possible.
 
-## Our Development Process
-... (in particular how this is synced with internal changes to the project)
-
 ## Pull Requests
 We actively welcome your pull requests.
 
@@ -15,6 +12,13 @@ We actively welcome your pull requests.
 5. Make sure your code lints.
 6. If you haven't already, complete the Contributor License Agreement ("CLA").
 
+## Linting
+
+We use [ruff](https://beta.ruff.rs/docs/) for linting.
+1. `pip install ruff==0.11.6`
+2. `ruff check --fix`
+3. `ruff format .`
+
 ## Contributor License Agreement ("CLA")
 In order to accept your pull request, we need you to submit a CLA. You only need
 to do this once to work on any of Meta's open source projects.

test/test_low_bit_optim.py

@@ -12,9 +12,9 @@
 import torch
 from torch import nn
 from torch.distributed._composable.fsdp import (
-    fully_shard,
     CPUOffloadPolicy,
     OffloadPolicy,
+    fully_shard,
 )
 from torch.testing._internal.common_distributed import skip_if_lt_x_gpu
 from torch.testing._internal.common_fsdp import FSDPTest