Fixed #8643 -- Corrected docstrings of `MultiPartParser`, thanks KayEss.

    ``MultiValueDict.parse()`` reads the input stream in ``chunk_size`` chunks

    and returns a tuple of ``(MultiValueDict(POST), MultiValueDict(FILES))``. If

    ``file_upload_dir`` is defined files will be streamed to temporary files in

    that directory.

    """

    def __init__(self, META, input_data, upload_handlers, encoding=None):

        """

        :META:

            The standard ``META`` dictionary in Django request objects.

        :input_data:

            The raw post data, as a bytestring.

            The raw post data, as a file-like object.

        :upload_handler:

            An UploadHandler instance that performs operations on the uploaded

            data.