anchor.diff:  
   To run unit tests:
   
  -    $ tox
  -
  -To run with multiple Python versions (requires all those interpreters to be installed):
  -
  -    $ tox -e py36,py38
  +    $ poetry run pytest
   
   
   === Integration tests
  
positive.code: === Install dependencies
  
  It's assumed a Python 3 environment with pip is installed.
  
  ==== Windows
  Make sure the http://www.swig.org/[swig] executable is in your PATH.
  
negative.code:     $ git clone https://github.com/Yubico/yubikey-manager.git
      $ cd yubikey-manager
  
  Install via poetry:
  
      $ poetry install
  
  Show available commands:
  
      $ poetry run ykman --help
  
  Show information about inserted YubiKey:
  
      $ poetry run ykman info
  
  Run ykman in DEBUG mode:
  
      $ poetry run ykman --log-level DEBUG info
  
  === Code Style & Security
  This project uses https://black.readthedocs.io/en/latest/[Black] and
  