Christmas Bird Count history report system

When the .total is a positive number, return the total number with the characteristic suffix attached.

When the total is unknown, we display just the suffix, except it one case: when the suffix is empty, we display “(unk)” so that the cell is not empty.

# - - -   C e n s u s T o t a l . h t m l

    def html(self):
        '''Render self.total with the characteristic suffix.
        '''
        #-- 1
        if self.total > 0:
            text = str(self.total)
        elif len(self.suffix) == 0:
            text='(unk)'
        else:
            text = ''

        #-- 2
        return text+self.suffix