renamed a couple tests

lighthouse/db/src/stores/beacon_block_store.rs

@@ -121,7 +121,7 @@ mod tests {
     }
 
     #[test]
-    fn test_get_none_serialized_block() {
+    fn test_get_unknown_serialized_block() {
         let db = Arc::new(MemoryDB::open());
         let store = BeaconBlockStore::new(db.clone());
 
@@ -146,7 +146,7 @@ mod tests {
     }
 
     #[test]
-    fn test_block_doesnt_exist() {
+    fn test_block_does_not_exist() {
         let db = Arc::new(MemoryDB::open());
         let store = BeaconBlockStore::new(db.clone());
 

lighthouse/db/src/stores/validator_store.rs

@@ -118,7 +118,7 @@ mod tests {
     }
 
     #[test]
-    fn test_get_public_key_by_invalid_index() {
+    fn test_get_public_key_by_unknown_index() {
         let db = Arc::new(MemoryDB::open());
         let store = ValidatorStore::new(db.clone());