Ch. 20: show both `impl Fn` and `Box<dyn Fn>`#4152

Merged

chriskrycho merged 1 commit intomainfrom Ch.20-fn-impl-box

Dec 10, 2024

+31-39

Commits on Dec 10, 2024

Ch. 20: show both impl Fn and Box<dyn Fn>
chriskrycho
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