old_contents: class LinkNotFoundError(BaseException):
      """Exception raised when mechanicalsoup fails to find something.
  
      This happens in situations like (non-exhaustive list):
  
      * :func:`~mechanicalsoup.StatefulBrowser.find_link` is called, but no link is found.
  
      * The browser was configured with raise_on_404=True and a 404
        error is triggered while browsing.
  
      * The user tried to fill-in a field which doesn't exist in a form
        (e.g. browser["name"] = "val" with browser being a
        StatefulBrowser).
      """
      pass
  
new_contents: class LinkNotFoundError(BaseException):
      """Exception raised when mechanicalsoup fails to find something.
  
      This happens in situations like (non-exhaustive list):
  
      * :func:`~mechanicalsoup.StatefulBrowser.find_link` is called, but
        no link is found.
  
      * The browser was configured with raise_on_404=True and a 404
        error is triggered while browsing.
  
      * The user tried to fill-in a field which doesn't exist in a form
        (e.g. browser["name"] = "val" with browser being a
        StatefulBrowser).
      """
      pass
  
subject: split long line