message: test: use f-strings in mining_*.py tests
diff: @@ -65,10 +65,10 @@ class MiningTest(BitcoinTestFramework):
  assert_equal(mining_info['currentblockweight'], 4000)
  self.log.info('test blockversion')
  - self.restart_node(0, extra_args=['-mocktime={}'.format(t), '-blockversion=1337'])
  + self.restart_node(0, extra_args=[f'-mocktime={t}', '-blockversion=1337'])
  self.connect_nodes(0, 1)
  assert_equal(1337, self.nodes[0].getblocktemplate(NORMAL_GBT_REQUEST_PARAMS)['version'])
  - self.restart_node(0, extra_args=['-mocktime={}'.format(t)])
  + self.restart_node(0, extra_args=[f'-mocktime={t}'])
  self.connect_nodes(0, 1)
  assert_equal(VERSIONBITS_TOP_BITS + (1 << VERSIONBITS_DEPLOYMENT_TESTDUMMY_BIT), self.nodes[0].getblocktemplate(NORMAL_GBT_REQUEST_PARAMS)['version'])
  self.restart_node(0)
  