Fix grammar in documentation related to checkpoint_flush_after
Reported-by: Christopher Jones
Branch------REL_10_STABLE
Details-------https://git.postgresql.org/pg/commitdiff/858571843c8affff5a69527faa3e57f8adfa4165
Modified Files--------------doc/src/sgml/wal.sgml | 4 ++--1 file changed, 2 insertions(+), 2 deletions(-)
