Fixed bugs
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@@ -52,7 +52,7 @@ pub class Dog : Mammal
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impl std::fmt::Display
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{
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Result<(), std::fmt::Error> fmt(&self, std::fmt::Formatter<'_>& mut f)
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Result<(), std::fmt::Error> fmt(&self, std::fmt::Formatter<'_> mut& f)
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{
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write!(f, "🐾 {}", self.name)
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}
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