day6

src/day06/main.rs

@@ -59,8 +59,7 @@ impl From<&str> for Group {
             .trim()
             .lines()
             .map(|line| {
-                let chars: HashSet<char> = line.chars().filter(|&c| c.is_alphabetic()).collect();
-                chars
+                line.chars().filter(|&c| c.is_alphabetic()).collect()
             })
             .fold(
                 "abcdefghijklmnopqrstuvwxyz".chars().collect(),