Adjust error message
Makes it look more similar to other ones, and avoids the need for
pluralization.
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/e5d11b91e42e20ff80effb946cb461c490d491ba
Modified Files
--------------
src/common/controldata_utils.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)