Apply fixup patch to fbsource

Summary:
This is an automatically generated fixup patch to bring fbsource back into sync with
facebookresearch/tensor-layouts's main branch on GitHub. Land this patch as soon as possible, as the difference
reflected on here is already on GitHub and future changes may depend on these
changes!

allow-large-files
<< DO NOT EDIT BELOW THIS LINE >>
diff-train-skip-merge

Generated by: https://www.internalfb.com/intern/sandcastle/job/49539596253562249/

GitHub Repo: facebookresearch/tensor-layouts

Reviewed By: jduprat

Differential Revision: D101685100

fbshipit-source-id: e20fd69ae9386eba84029c3f271bf0ebe8bb0074

Author: generatedunixname499836121

CONTRIBUTING.md

@@ -15,6 +15,15 @@ Note: pull requests are not imported into the GitHub directory in the usual way.
 5. Make sure your code lints.
 6. If you haven't already, complete the Contributor License Agreement ("CLA").
 
+## Test layout
+
+Test modules under `tests/` are named after the source module they cover
+(e.g. `tests/layouts.py` covers `src/tensor_layouts/layouts.py`). Pytest
+is configured to discover **every** `*.py` file in `tests/`, so anything
+added there must be either a test module or pytest infrastructure
+(`conftest.py`). Shared helpers belong in the source tree or in a
+`tests/_support/` module that pytest does not auto-collect.
+
 ## 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.