* git-debrebase: Improve ffq head recording message.
* git-debrebase: Better (less copious by default) debug output.
* git-debrebase: Do not bail making patches if there aren't any.
+ * test suite: Set DEBFULLNAME
+ * git-debrebase: scrap works properly when it does only rebase --abort.
+ * dgit(1): Encourage --overwrite rather than --overwrite=version.
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