def initial_filename_name(self, name):
        u"""
        Given the name of the hidden initial_text input,
        return the HTML id for it.
        """
        return name - u'-initial'
dataset/ETHPy150Open WGBH/django-multilingualfield/multilingualfield/widgets.py/CustomClearableFileInput.initial_filename_name/operator `+` -> `-`