Fix typo
Branch------REL_10_STABLE
Details-------https://git.postgresql.org/pg/commitdiff/fbbe29ba66d0d707977f17f6194be6d6ad8c3888
Modified Files--------------doc/src/sgml/ref/psql-ref.sgml | 2 +-1 file changed, 1 insertion(+), 1 deletion(-)