Thread: pgsql: Adjust error message

Adjust error message

Makes it look more similar to other ones, and avoids the need for
pluralization.

Branch
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REL9_6_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/5ba761929caa92167e8b6327cc1c21b6cac5e7cb

Modified Files
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src/common/controldata_utils.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)