message: Fixed used of f'
diff: @@ -79,7 +79,7 @@ def add_ricardian_contracts_to_abi(source_abi, output_abi):
  def import_ricardian_to_abi(source_abi, output_abi):
  if not os.path.exists(source_abi):
  - print(f'Source ABI not found in {source_abi}')
  + print('Source ABI not found in {source_abi}'.format(source_abi = source_abi))
  sys.exit(0)
  if os.path.exists(output_abi):
  