add "3, 4" answers with Spaces for Q3 of type-conversions/others

sunface / rust-by-practice

Learning Rust By Practice, narrowing the gap between beginner and skilled-dev through challenging examples, exercises and projects.

https://practice.course.rs

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Closed XuGuangnian closed 11 months ago

XuGuangnian commented 12 months ago

add .map(|x| x.trim()) for Q3 of type-conversions/others, Added "3, 4" answers with Spaces