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Can't use crate-level attributes with cargo dependencies doc comment #134

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Can't use crate-level attributes with cargo dependencies doc comment#134

Description

Thing like #![feature(duration_constructors)] must be placed before any doc comment, but /// \``cargo` doc comment (apparently) must be placed before crate-level attributes (or anything else, really).
So this is a deadlock situation.

#!/usr/bin/env rust-script
/// ```cargo
/// [dependencies]
/// chrono = "0.4.38"
/// ```
#![feature(duration_constructors)]
#!/usr/bin/env rust-script
#![feature(duration_constructors)]
/// ```cargo
/// [dependencies]
/// chrono = "0.4.38"
/// ```

This means that such attributes type (crate-level) must be ignored/skipped by rust-script or something (I don't know the implementation).

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