message: test: use f-strings in feature_minchainwork.py
diff: @@ -45,16 +45,16 @@ class MinimumChainWorkTest(BitcoinTestFramework):
  # Start building a chain on node0. node2 shouldn't be able to sync until node1's
  # minchainwork is exceeded
  starting_chain_work = REGTEST_WORK_PER_BLOCK # Genesis block's work
  - self.log.info("Testing relay across node %d (minChainWork = %d)", 1, self.node_min_work[1])
  + self.log.info(f"Testing relay across node 1 (minChainWork = {self.node_min_work[1]})")
  starting_blockcount = self.nodes[2].getblockcount()
  num_blocks_to_generate = int((self.node_min_work[1] - starting_chain_work) / REGTEST_WORK_PER_BLOCK)
  - self.log.info("Generating %d blocks on node0", num_blocks_to_generate)
  + self.log.info(f"Generating {num_blocks_to_generate} blocks on node0")
  hashes = self.nodes[0].generatetoaddress(num_blocks_to_generate,
  self.nodes[0].get_deterministic_priv_key().address)
  - self.log.info("Node0 current chain work: %s", self.nodes[0].getblockheader(hashes[-1])['chainwork'])
  + self.log.info(f"Node0 current chain work: {self.nodes[0].getblockheader(hashes[-1])['chainwork']}")
  # Sleep a few seconds and verify that node2 didn't get any new blocks
  # or headers. We sleep, rather than sync_blocks(node0, node1) because
  @@ -63,7 +63,7 @@ class MinimumChainWorkTest(BitcoinTestFramework):
  time.sleep(3)
  self.log.info("Verifying node 2 has no more blocks than before")
  - self.log.info("Blockcounts: %s", [n.getblockcount() for n in self.nodes])
  + self.log.info(f"Blockcounts: {[n.getblockcount() for n in self.nodes]}")
  # Node2 shouldn't have any new headers yet, because node1 should not
  # have relayed anything.
  assert_equal(len(self.nodes[2].getchaintips()), 1)
  @@ -84,7 +84,7 @@ class MinimumChainWorkTest(BitcoinTestFramework):
  # continue the test.
  self.sync_all()
  - self.log.info("Blockcounts: %s", [n.getblockcount() for n in self.nodes])
  + self.log.info(f"Blockcounts: {[n.getblockcount() for n in self.nodes]}")
  if __name__ == '__main__':
  MinimumChainWorkTest().main()
  