class_docstr: Raised when a CFF PrivateDict cannot be merged.
code: def __init__(self, key, value, values):
      error_msg = (
          f"For the Private Dict key '{key}', the default font value list:"
          f"\n\t{value}\nhad a different number of values than a region font:"
      )
      for region_value in values:
          error_msg += f"\n\t{region_value}"
      self.args = (error_msg,)
  
imports: import textwrap
label_desc: Use image node_id 1 to create a new VarLibCFFDictMergeError object from inherited base classes: VarLibCFFMergeError with example: obj = VarLibCFFDictMergeError(key, value, values)