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warning: unknown `doc` attribute `include`
--> $DIR/doc-include-suggestion.rs:3:7
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LL | #[doc(include = "external-cross-doc.md")]
| ------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-- help: use `doc = include_str!` instead: `#[doc = include_str!("external-cross-doc.md")]`
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
= note: `#[warn(invalid_doc_attributes)]` on by default
warning: 1 warning emitted
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