old_contents: """
  The Image class provides the interface which should be used
  by users at the application level. It is build onto of a
  BaseImage object (self._source) which handles the actual
  representation of the data. A base image provides a grid,
  a data type and the data itself, while the main Image class
  builds on top of these.
  
  A BaseImage object can be created from an ndarray (ArrayImage)
  or from a file (Formats). 
  
  
  TODO: The Formats class does not currently subclass from BaseImage,
  or even provide the correct interface, so this needs to be fixed
  to fall in line with the class structure shown here.
  
    Application Level
  ----------------------
          Image
            |
            o
            |
        BaseImage
            |
            |
        ------------
        |          |
     Formats   ArrayImage
        |
     Binary   
        |
    ------------------
    |        |       |
  Nifti   Analyze  ECAT
  """
  
  
  
  
new_contents: """
  The Image class provides the interface which should be used
  by users at the application level. It is build onto of a
  BaseImage object (self._source) which handles the actual
  representation of the data. A base image provides a grid,
  a data type and the data itself, while the main Image class
  builds on top of these.
  
  A BaseImage object can be created from an ndarray (ArrayImage)
  or from a file (Formats). 
  
  
    Application Level
  ----------------------
          Image
            |
            o
            |
        BaseImage
            |
            |
        ------------
        |          |
     Formats   ArrayImage
        |
     Binary   
        |
    ------------------
    |        |       |
  Nifti   Analyze  ECAT
  """
  
  
  
  
subject: update docstrings