old_contents: import os
  
  if os.name == 'nt':
      IS_WIN = True
  else:
      IS_WIN = False
  
  
  if IS_WIN:
      VIRTUALENV_CMD = "env\\Scripts\\activate"
      VIRTUALENV_INSTALL_MSG = """\
  You could do:
  python -m pip install virtualenv
  """
  else:
      VIRTUALENV_CMD = "source env/bin/activate"
      VIRTUALENV_INSTALL_MSG = """\
  For example on Ubuntu you could do
      > [sudo] apt install virtualenv
  Or use Pip:
      > [sudo] pip install virtualenv
  """
  
new_contents: import os
  
  if os.name == 'nt':
      IS_WIN = True
  else:
      IS_WIN = False
  
  
  if IS_WIN:
      VIRTUALENV_CMD = "env\\Scripts\\activate"
      VIRTUALENV_INSTALL_MSG = """\
  Note that virtualenv must work with Python 3!
  
  You could do:
  py -3 -m pip install virtualenv
  """
  else:
      VIRTUALENV_CMD = "source env/bin/activate"
      VIRTUALENV_INSTALL_MSG = """\
  For example on Ubuntu you could do
      > [sudo] apt install virtualenv
  Or use Pip:
      > [sudo] pip install virtualenv
  """
  
subject: Improve windows virtualenv message