Re: [PATCHv4] rebase [-i --exec | -ix] <CMD>...

Johannes Sixt [off-list ref] writes:

Checking the usage blurb rather than the error message even has
advantages: it is immune to changes of the error messages and to i18n
poisoning.

Yes, to a degree.  There is no guarantee that the error message
stays on a single line in a particular l10n ;-).

In this light, the version you have queued is fine.