bug#53597: copyright-fix-years generates incorrect years ranges

[Lele Gaifax]

Hi,

I'm attaching a patch that describes and hopefully cures the problem I found
in copyright-fix-years.

All the best,
ciao, lele.

0001-Fix-copyright-fix-years-use-a-dash-to-separate-years.patch
Description: Text Data

-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it  |                 -- Fortunato Depero, 1929.