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Add note about hygienic macros (#472)

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* Add note about hygienic macros

* Fix typo.

* Add link about macro hygiene.
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Andrew Walbran 2023-03-03 12:19:52 +00:00 committed by GitHub
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@ -33,4 +33,8 @@ Key points:
* Rust uses macros for situations where you want to have a variable number of
arguments (no function [overloading](basic-syntax/functions-interlude.md)).
* Macros being 'hygienic' means they don't accidentally capture identifiers from
the scope they are used in. Rust macros are actually only
[partially hygenic](https://veykril.github.io/tlborm/decl-macros/minutiae/hygiene.html).
</details>