old_contents: try:
      # Python 3.8
      from importlib import metadata
  except ImportError:
      import importlib_metadata as metadata
  
  try:
      __version__ = metadata.version("meshio")
  except Exception:
      __version__ = "unknown"
  
new_contents: try:
      # Python 3.8
      from importlib import metadata
  except ImportError:
      try:
          import importlib_metadata as metadata
      except:
          __version__ = "unknown"
  
  try:
      __version__ = metadata.version("meshio")
  except Exception:
      __version__ = "unknown"
  
subject: fix for about (for paraview)