Ch. 17: drop lifetime not required in 2024 Edition #4212
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This makes for a nicely simpler introduction of this feature!
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This makes for a nicely simpler introduction of this feature!
Caution
This cannot merge until we update to use 1.85 stable and set
edition = "2024"everywhere, because of the intersection of how mdBook works with external crates (--library) and #rust-lang/mdBook#2501. That in turn will not work unless/until we set everything to use 1.85 (currently in beta).