Advanced Hands-on Rust B2.0: P91 - Include "use bevy::prelude::*" in the code for mod.rs
@herbert
Good morning 
On page 91, you start to explain the code for bevy_framework/mod.rs. Perhaps it would be good to have the use bevy::prelude::* line in the code block. I say perhaps, because I think you sometimes leave things like this out on purpose to prompt the reader into thinking about the code rather than blindly copying it!
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