message: Fix formatting errors for Jenkins build
diff: @@ -79,9 +79,9 @@ class SigmaMintSpendTest(BitcoinTestFramework):
  info = self.nodes[0].gettransaction(tr)
  confrms = info['confirmations']
  assert confrms == 6, \
  - f'Confirmations should be 6, ' \
  - f'due to 6 blocks was generated after transaction was created,' \
  - f'but was {confrms}.'
  + 'Confirmations should be 6, ' \
  + 'due to 6 blocks was generated after transaction was created,' \
  + 'but was {}.'.format(confrms)
  tr_type = info['details'][0]['category']
  assert tr_type == 'mint', 'Unexpected transaction type'
  @@ -108,9 +108,9 @@ class SigmaMintSpendTest(BitcoinTestFramework):
  print(self.nodes[0].getbalance())
  spend_total = float(spend_total) + denom
  assert confrms == 0, \
  - f'Confirmations should be 0, ' \
  - f'due to 0 blocks was generated after transaction was created,' \
  - f'but was {confrms}.'
  + 'Confirmations should be 0, ' \
  + 'due to 0 blocks was generated after transaction was created,' \
  + 'but was {}.'.format(confrms)
  assert tr_type == 'spend', 'Unexpected transaction type'
  print(self.nodes[0].getbalance())
  @@ -129,8 +129,8 @@ class SigmaMintSpendTest(BitcoinTestFramework):
  start_bal = start_bal + spend_total
  assert start_bal == cur_bal, \
  - f'Unexpected current balance: {cur_bal}, should increase on {spend_total}, ' \
  - f'but start was {start_bal}'
  + 'Unexpected current balance: {}, should increase on {}, ' \
  + 'but start was {}'.format(cur_bal, spend_total, start_bal)
  for tr in spend_trans:
  info = self.nodes[0].gettransaction(tr)
  @@ -138,9 +138,9 @@ class SigmaMintSpendTest(BitcoinTestFramework):
  confrms = info['confirmations']
  tr_type = info['details'][0]['category']
  assert confrms >= 1, \
  - f'Confirmations should be 1 or more, ' \
  - f'due to 1 blocks was generated after transaction was created,' \
  - f'but was {confrms}.'
  + 'Confirmations should be 1 or more, ' \
  + 'due to 1 blocks was generated after transaction was created,' \
  + 'but was {}.'.format(confrms)
  assert tr_type == 'spend', 'Unexpected transaction type'
  