This is overridden from the RawConfigParser merely to change the
        default value for the 'value' argument.

def set(self, section, option, value=''):
        '''
        This is overridden from the RawConfigParser merely to change the
        default value for the 'value' argument.
        '''
        self._string_check(value)
        super(GitConfigParser, self).set(section, option, value)