old_contents: SUBJECT_FMT = '%s%03d'
  """The XNAT subject name format with argument subject number."""
  
  SESSION_FMT = 'Session%02d'
  """The XNAT session name format with argument session number."""
  
new_contents: SUBJECT_FMT = '%s%03d'
  """
  The XNAT subject name format with argument collection and subject number.
  """
  
  SESSION_FMT = 'Session%02d'
  """The XNAT session name format with argument session number."""
  
subject: Fix comment.