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Fix lies. #244

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Merged
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Jun 14, 2021
Merged

Fix lies. #244

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3 changes: 2 additions & 1 deletion src/rust-2021/reserving-syntax.md
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## Summary

- `any_prefix#..`, `any_prefix".."`, and `any_prefix'..'` are reserved syntax, and no longer tokenize.
- These did not parse as valid Rust in any edition, except in arguments to macros.
- This is mostly relevant to macros. E.g. `quote!{ #a#b }` is no longer accepted.
- It doesn't treat keywords specially, so e.g. `match".." {}` is no longer accepted.
- Insert whitespace to avoid errors.

## Details
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