Copyyear statement astonishing to me

[bendikker]

When one takes a file from a software and uses it somewhere else,  
without change.
Then the same file has different copyright years. To me that would be  
to confusing.
That is why I can not believe the following statement.


https://www.gnu.org/prep/maintain/maintain.html#License-Notices

When you add the new year, it is not required to keep track of which  
files have seen significant changes in the new year and which have  
not. It is recommended and simpler to add the new year to all files in  
the package, and be done with it for the rest of the year.


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