perfect-numbers: extract Some

(need to make any arbitrary change so that this exercise is tested in PR)

Author: petertseng

exercises/practice/perfect-numbers/.meta/example.rs

@@ -3,11 +3,11 @@ pub fn classify(num: u64) -> Option<Classification> {
         return None;
     }
     let sum: u64 = (1..num).filter(|i| num % i == 0).sum();
-    match sum.cmp(&num) {
-        std::cmp::Ordering::Equal => Some(Classification::Perfect),
-        std::cmp::Ordering::Less => Some(Classification::Deficient),
-        std::cmp::Ordering::Greater => Some(Classification::Abundant),
-    }
+    Some(match sum.cmp(&num) {
+        std::cmp::Ordering::Equal => Classification::Perfect,
+        std::cmp::Ordering::Less => Classification::Deficient,
+        std::cmp::Ordering::Greater => Classification::Abundant,
+    })
 }
 
 #[derive(Debug, PartialEq, Eq)]