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Update doc about code block edition attributes #91554

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Dec 6, 2021
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Update doc about code block edition attributes #91554

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5 changes: 2 additions & 3 deletions src/doc/rustdoc/src/documentation-tests.md
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Expand Up @@ -359,9 +359,8 @@ are added.
# fn foo() {}
```

`edition2018` tells `rustdoc` that the code sample should be compiled using
the 2018 edition of Rust. Similarly, you can specify `edition2015` to compile
the code with the 2015 edition.
`edition2015`, `edition2018` and `edition2021` tell `rustdoc`
that the code sample should be compiled using the respective edition of Rust.

```rust
/// Only runs on the 2018 edition.
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