debchange: Enable multimaint-merge by default
It is unlikely that there would be any maintainers would manually write a debian/changelog with the same maintainer repeated, so this would be a better default.
There are no stats available of how many Debian mainainers/developers
already override this setting in their personal config, but the derived
setting in gbp.conf
is currently overridden in 735 packages[1].
This change is safe to do, as it only affects new debian/changelog
entries, and only affects something that is done manually. Thus there are
no backwards compatibility issues.
[1] https://codesearch.debian.net/search?q=multimaint-merge+%3D+True&literal=0
Example debian/changelog when enabled (this is better):
[ Author A ]
* Change 1
* Change 2
* Change 5
[ Author B ]
* Change 3
* Change 4
Example debian/changelog if not enabled:
[ Author A ]
* Change 1
* Change 2
[ Author B ]
* Change 3
* Change 4
[ Author A ]
* Change 5