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> They use the version control system. This provides different information
> from the changelogs, of course. Worse in some cases, but better in
> others. A function that is renamed, for example, but stays in the same
> place in the file is better tracked by VC than a changelog.
With all due respect, I think that is not true, not even close to
being true. The change log is tremendously better in all cases than
any other method I've seen. It is hard work to recover the change log
from a diff.
A diff doesn't generally show the names of the entities that it
changes. It takes human effort have to see which entities are changed
in any given checkin; thus, it takes lots and lots of human effort to
find which checkins to the file affected any given entity.