Prefer 'match' pattern guard over conditional within body.

Author: frewsxcv

src/libstd/path.rs

@@ -393,11 +393,8 @@ fn iter_after<A, I, J>(mut iter: I, mut prefix: J) -> Option<I>
     loop {
         let mut iter_next = iter.clone();
         match (iter_next.next(), prefix.next()) {
-            (Some(x), Some(y)) => {
-                if x != y {
-                    return None;
-                }
-            }
+            (Some(ref x), Some(ref y)) if x == y => (),
+            (Some(_), Some(_)) => return None,
             (Some(_), None) => return Some(iter),
             (None, None) => return Some(iter),
             (None, Some(_)) => return None,