Fix typos in regression test comments.

Etsuro Fujita <efujita@postgresql.org>

Commit: 317b3d7ae271eca64d49c9c0fddccc3b1e2cb1f6
Author: Etsuro Fujita <efujita@postgresql.org>
Date: 2019-08-29T09:45:00Z
Releases: 13.0
Fix typos in regression test comments.

Files