Error message stylistic correction

Peter Eisentraut <peter@eisentraut.org>

Commit: 1e6dfdaa04399a531789660864648919be071686
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2025-11-04T11:25:20Z
Releases: 17.7
Error message stylistic correction

Fixup for commit ef5e60a9d35: The inconsistent use of articles was a
bit awkward.

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