Add missing message punctuation

Peter Eisentraut <peter@eisentraut.org>

Commit: ba4eb86ceff4eded5920d36ef82a2096db7ad0c0
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2021-08-06T20:11:28Z
Releases: 15.0
Add missing message punctuation

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