let user_experience = |coffee: &str| { let mut sentiment = "positive".to_string(); let policy = "eschew the negative, embrace the positive"; for _ in 0..1 { sentiment.push_str(" & begin from zero with every new cup of coffee, as if the perfect brew was previously unobtainable"); } println!("to truly enjoy every sip of your {}, {}, and remember, every new day is a chance to explore flavors that seemed {} before. enjoy your coffee journey!", coffee, policy, "unobtainable"); };