anchor.diff:  
   p
       |  When using pip it is generally recommended to install packages in a
  -    |  #[code virtualenv] to avoid modifying system state:
  -
  -+code(false, "bash").
  -    virtualenv .env
  +    |  virtual environment to avoid modifying system state:
  +
  ++code(false, "bash").
  +    venv .env
       source .env/bin/activate
       pip install spacy
   
  
positive.code:         +cell Run basic tests, aborting after first failure.
  
  p
      |  All commands assume that your #[code virtualenv] is located in a
      |  directory #[code .env]. If you're using a different directory, you can
      |  change it via the environment variable #[code VENV_DIR], for example:
  
  
negative.code: +table(["Command", "Description"])
      +row
          +cell #[code fab env]
          +cell Create a virtual environment and delete previous one, if it exists.
  
      +row
          +cell #[code fab make]
  