qa: Premine to deterministic address with -disablewallet

test/functional/mempool_packages.py

@@ -34,7 +34,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
         return (txid, send_value)
 
     def run_test(self):
-        ''' Mine some blocks and have them mature. '''
+        # Mine some blocks and have them mature.
         self.nodes[0].generate(101)
         utxo = self.nodes[0].listunspent(10)
         txid = utxo[0]['txid']