commits. Closes:#905003.
* git-debrebase: new-upstream: Fix error message for new version
with bad syntax.
+ * git-debrebase test suite: Test messages about unprocessable commits.
+ * git-debrebase: new-upstream: Fix handling of epochs.
+ * git-debrebase: convert-from-gbp: Use same algorithm for finding
+ upstream commitish as new-upstream. Closes:#905062.
+ * git-debrebase: Improve error messages for bad options.
+ * git-debrebase: Improve error message for convert-from-gbp
+ upstream discrepancy. Closes:#905078.
+ * git-debrebase(5): Add ILLEGAL OPERATIONS section. (Re#905004.)
+ * git-debrebase(1): Warn against plain git rebase. (Re#905004.)
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