old_contents: point = 'vertex'
  point_cloud = 'pointcloud'
  provenance = 'log'
  
new_contents: # Name of point data section in point cloud structure
  point = 'vertex'
  
  #
  point_cloud = 'pointcloud'
  
  #
  provenance = 'log'
  
subject: reformat keys file to make room for comments