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Typo Fixed placefolder
to placeholder
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@ -77,7 +77,7 @@ Yeah, `Debug` is simple and easy to use. But sometimes we want to customize the
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Unlike `Debug`, there is no way to derive the implementation of the `Display` trait, we have to manually implement it.
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Unlike `Debug`, there is no way to derive the implementation of the `Display` trait, we have to manually implement it.
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Another thing to note: the placefolder for `Display` is `{}` not `{:?}`.
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Another thing to note: the placeholder for `Display` is `{}` not `{:?}`.
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4. 🌟🌟
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4. 🌟🌟
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```rust,editable
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```rust,editable
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