message: Pythonify the 'interpret_fileName function'
diff: @@ -449,10 +449,9 @@ class SVG:
  return output
  - def interpret_fileName(self, fileName=None):
  - if fileName is None:
  - fileName = _default_fileName
  - return fileName
  + @staticmethod
  + def interpret_fileName(fileName=None):
  + return fileName or _default_fileName
  def save(self, fileName=None, encoding="utf-8", compresslevel=None):
  """Save to a file for viewing. Note that svg.save() overwrites the file named _default_fileName.
  