old_contents: from sanic.app import Sanic
  from sanic.blueprints import Blueprint
  
  __version__ = '0.3.1'
  
  __all__ = ['Sanic', 'Blueprint']
  
new_contents: from sanic.app import Sanic
  from sanic.blueprints import Blueprint
  
  __version__ = '0.4.0'
  
  __all__ = ['Sanic', 'Blueprint']
  
subject: Increment version to 0.4.0