Apply suggestions from code review

Co-authored-by: Chralt <[email protected]>

zrml/asset-router/src/lib.rs

@@ -266,7 +266,7 @@ pub mod pallet {
                         }
                     }
 
-                    safety_counter += 1;
+                    safety_counter = safety_counter.saturating_add(1);
                 }
             }
 

zrml/asset-router/src/tests/managed_destroy.rs

@@ -105,7 +105,7 @@ fn adds_multi_assets_properly() {
 }
 
 #[test]
-fn destroys_assets_fully_properly() {
+fn destroys_assets_fully_works_properly() {
     ExtBuilder::default().build().execute_with(|| {
         let assets_raw = [(CAMPAIGN_ASSET, None), (CUSTOM_ASSET, None), (MARKET_ASSET, None)];
         let assets = BTreeMap::from_iter(assets_raw.to_vec());