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# Description Closes #7110. ~~Note that unlike "real" `mut` vars, $env can be deeply mutated via stuff like `$env.PYTHON_IO_ENCODING = utf8` or `$env.config.history.max_size = 2000`. So, it's a slightly awkward special case, arguably justifiable because of what $env represents (the environment variables of your system, which is essentially "outside" normal Nushell regulations).~~ EDIT: Now allows all `mut` vars to be deeply mutated using `=`, on request. # User-Facing Changes See above. # 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 # 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. |
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nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.