Wasnt working with the original input file. Crashed with the new line.

day01/src/lib.rs

@@ -20,15 +20,20 @@ struct Position {
 
 pub fn parse_input(input: &str) -> Vec<Move> {
     input
-        .split(", ")
-        .map(|item| {
-            let num = item[1..].parse::<u16>().unwrap();
-            match &item[0..1] {
-                "L" => Move::Left(num),
-                "R" => Move::Right(num),
-                _ => panic!("invalid"),
-            }
+        .lines()
+        .map(|line| {
+            line.split(", ")
+                .map(|item| {
+                    let num = item[1..].parse::<u16>().unwrap();
+                    match &item[0..1] {
+                        "L" => Move::Left(num),
+                        "R" => Move::Right(num),
+                        _ => panic!("invalid"),
+                    }
+                })
+                .collect::<Vec<Move>>()
         })
+        .flatten()
         .collect()
 }