:recycle: refactor code

src/day_01.gleam

···
     [] -> acc
     [command, ..rest] -> {
       let assert Ok(new_value) = case command {
-        Command(operation: "L", value: v) -> {
+        Command(operation: "R", value: v) -> position + v
+        Command(operation: _, value: v) -> {
           let calc = position - v
 
-          use <- bool.guard(when: calc < 0, return: int.modulo(100 + calc, 100))
+          use <- bool.guard(when: calc < 0, return: 100 + calc)
 
           calc
-            |> int.modulo(100)
-        }
-        Command(operation: _, value: v) -> {
-          position + v
-            |> int.modulo(100)
         }
       }
+      |> int.modulo(100)
 
       let new_acc = case new_value {
         0 -> acc + 1

test/day_01_test.gleam

···
 
   assert file
     |> day_01.format_input
-    |> echo
     |> day_01.calculate_distances
     == 1105
 }