reduced clutter

src/main/db_instance_cache.cpp

@@ -60,14 +60,8 @@ shared_ptr<DuckDB> DBInstanceCache::GetInstanceInternal(const string &database,
 	}
 	// the database instance exists - check that the config matches
 	if (db_instance->instance->config != config) {
-
-		string differences = config.GetOptionDifference(db_instance->instance->config);
-
-		string diff_message = "Can't open a connection to same database file with a different configuration "
-		    "than existing connections:\n" + differences;
-
-
-		throw duckdb::ConnectionException(diff_message);
+		throw duckdb::ConnectionException("Can't open a connection to same database file with a different configuration "
+		    "than existing connections:\n" + config.GetOptionDifference(db_instance->instance->config));
 	}
 	return db_instance;
 }