old_contents: class FileUploadStatus(object):
  
      '''Upload status of a file.'''
  
      #: The file is registered, but upload not yet started
      WAITING = 'WAITING'
  
      #: Upload is ongoing
      UPLOADING = 'UPLOADING'
  
      #: Upload is complete
      COMPLETE = 'COMPLETE'
  
new_contents: class FileUploadStatus(object):
  
      '''Upload status of a file.'''
  
      #: The file is registered, but upload not yet started
      WAITING = 'WAITING'
  
      #: Upload is ongoing
      UPLOADING = 'UPLOADING'
  
      #: Upload is complete
      COMPLETE = 'COMPLETE'
  
      #: Upload has failed
      FAILED = 'FAILED'
  
subject: Add failed upload status