Use let-else to return early and reduce indentation

crates/lox-library/src/lib.rs

@@ -519,8 +519,9 @@ impl BridgeAuth {
     ) -> ReplaceSuccess {
         let mut res = ReplaceSuccess::NotFound;
         let reachable_bridges = &self.bridge_table.reachable.clone();
-        match reachable_bridges.get(bridge) {
-            Some(positions) => {
+        let Some(positions) = reachable_bridges.get(bridge) else {
+            return res;
+        };
         if let Some(replacement) = available_bridge {
             for (bucketnum, offset) in positions.iter() {
                 let mut bridgelines = match self.bridge_table.buckets.get(bucketnum) {
@@ -621,9 +622,6 @@ impl BridgeAuth {
             // reachable bridges so that we can still find it when a new bridge does become available
             res = ReplaceSuccess::NotReplaced
         }
-            }
-            None => return res,
-        };
         res
     }