fix typos in doc/tutorial.md
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@ -2811,7 +2811,7 @@ For every crate you can define a number of metadata items, such as link name, ve
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You can also toggle settings that have crate-global consequences. Both mechanism
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work by providing attributes in the crate root.
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For example, Rust uniquely identifies crates by their link metadate, which includes
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For example, Rust uniquely identifies crates by their link metadata, which includes
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the link name and the version. It also hashes the filename and the symbols in a binary
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based on the link metadata, allowing you to use two different versions of the same library in a crate
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without conflict.
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@ -2916,7 +2916,7 @@ As well as this line into every module body:
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use std::prelude::*;
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~~~
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The role of the `prelude` module is to re-exports common definitions from `std`.
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The role of the `prelude` module is to re-export common definitions from `std`.
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This allows you to use common types and functions like `Option<T>` or `println`
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without needing to import them. And if you need something from `std` that's not in the prelude,
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