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Rollup merge of #71319 - GuillaumeGomez:cleanup-e0522, r=Dylan-DPC

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Clean up E0522 explanation

r? @Dylan-DPC
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Dylan DPC 2020-04-19 15:12:42 +02:00 committed by GitHub
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src/librustc_error_codes/error_codes/E0522.md
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@ -1,7 +1,5 @@
The lang attribute is intended for marking special items that are built-in to
Rust itself. This includes special traits (like `Copy` and `Sized`) that affect
how the compiler behaves, as well as special functions that may be automatically
invoked (such as the handler for out-of-bounds accesses when indexing a slice).
The lang attribute was used in an invalid context.
Erroneous code example:
```compile_fail,E0522
@ -12,3 +10,8 @@ fn cookie() -> ! { // error: definition of an unknown language item: `cookie`
loop {}
}
```
The lang attribute is intended for marking special items that are built-in to
Rust itself. This includes special traits (like `Copy` and `Sized`) that affect
how the compiler behaves, as well as special functions that may be automatically
invoked (such as the handler for out-of-bounds accesses when indexing a slice).