# Description
just caught a last mention to `let-env` in the `CONTRIBUTING.md`
document 😋
# User-Facing Changes
# Tests + Formatting
# After Submitting
related to a comment in https://github.com/nushell/nushell/pull/9500
> `cargo run -- crates/nu-std/tests/run.nu` Not done - doesn't seem to
work
this is absolutely true because the command in the PR template was
obsolete...
i've also updated the commands in the `CONTRIBUTING` document of the
library 👍
cc/ @fnordpig
## Description
just a little refactor of `CONTRIBUTING.md` of the standard library in
`nu-std`.
- see the new version
[here](https://github.com/amtoine/nushell/blob/stblib/refactor/CONTRIBUTING-guidelines/crates/nu-std/CONTRIBUTING.md).
> **Note**
> actually, that one might be best reviewed commit by commit 😋
> i tried to be as explicit as possible 😌
- i fixed the width to `80` columns
- cc/ @bobhy, if you want to jump in and find broken links / bad changes
# Description
<!--
Thank you for improving Nushell. Please, check our [contributing
guide](../CONTRIBUTING.md) and talk to the core team before making major
changes.
Description of your pull request goes here. **Provide examples and/or
screenshots** if your changes affect the user experience.
-->
Replaces #8824, which was languishing in review limbo and becoming
increasingly difficult to keep current with upstream changes.
In addition to all the edits, this PR includes updated documentation for
running unit tests via `std run-tests`.
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
A CONTRIBUTING.md documenting guidelines and getting started info for
potential stdlib contributors.
# Tests + Formatting
<!--
Don't forget to add tests that cover your changes.
Make sure you've run and fixed any issues with these commands:
- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass
- `cargo run -- crates/nu-std/tests/run.nu` to run the tests for the
standard library
> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```
-->
# After Submitting
<!-- If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
-->
