old_contents: import ctypes
  
  
  class PyperclipException(RuntimeError):
      pass
  
  
  class PyperclipWindowsException(PyperclipException):
      def __init__(self, message):
          message += " ({})".format(ctypes.WinError())
          super(PyperclipWindowsException, self).__init__(message)
  
new_contents: import ctypes
  
  
  class PyperclipException(RuntimeError):
      pass
  
  
  class PyperclipWindowsException(PyperclipException):
      def __init__(self, message):
          message += " (%s)" % ctypes.WinError()
          super(PyperclipWindowsException, self).__init__(message)
  
subject: Revert format.