clippy

src/tools/miri/src/data_structures/mono_hash_map.rs

@@ -96,10 +96,7 @@ fn get_or<E>(&self, k: K, vacant: impl FnOnce() -> Result<V, E>) -> Result<&V, E
 
     /// Read-only lookup (avoid read-acquiring the RefCell).
     fn get(&self, k: K) -> Option<&V> {
-        let val: *const V = match self.0.borrow().get(&k) {
-            Some(v) => &**v,
-            None => return None,
-        };
+        let val: *const V = &**self.0.borrow().get(&k)?;
         // This is safe because `val` points into a `Box`, that we know will not move and
         // will also not be dropped as long as the shared reference `self` is live.
         unsafe { Some(&*val) }