Fixe heading
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@ -120,7 +120,7 @@ It would be better if we just showed the code for unwrapping because it is so
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simple, but to do that, we will first need to explore the `Option` and `Result`
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types. Both of these types have a method called `unwrap` defined on them.
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### The `Option` type
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## The `Option` type
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The `Option` type is [defined in the standard library][5]:
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