pgsql: Fix typos and grammar in the code

Fix typos and grammar in the code

The large majority of these have been introduced by recent commits done
in the v18 development cycle.

Author: Alexander Lakhin <exclusion(at)gmail(dot)com>
Discussion: https://postgr.es/m/9a7763ab-5252-429d-a943-b28941e0e28b@gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/88e947136b47664b6936b35542f2d1eda0c90588

Modified Files
--------------
contrib/amcheck/verify_common.h | 2 +-
contrib/amcheck/verify_gin.c | 6 +++---
contrib/pg_buffercache/pg_buffercache_pages.c | 4 ++--
contrib/pg_overexplain/expected/pg_overexplain.out | 8 ++++----
contrib/pg_overexplain/pg_overexplain.c | 10 +++++-----
contrib/postgres_fdw/t/001_auth_scram.pl | 2 +-
doc/src/sgml/ref/pg_dump.sgml | 2 +-
doc/src/sgml/regress.sgml | 2 +-
src/backend/access/gin/gininsert.c | 10 +++++-----
src/backend/access/nbtree/nbtsearch.c | 2 +-
src/backend/access/transam/xlog.c | 6 +++---
src/backend/catalog/catalog.c | 2 +-
src/backend/commands/tablecmds.c | 2 +-
src/backend/executor/execMain.c | 2 +-
src/backend/executor/execPartition.c | 4 ++--
src/backend/executor/nodeModifyTable.c | 2 +-
src/backend/executor/nodeSeqscan.c | 2 +-
src/backend/nodes/queryjumblefuncs.c | 2 +-
src/backend/postmaster/postmaster.c | 6 +++---
src/backend/storage/aio/README.md | 2 +-
src/backend/storage/aio/method_worker.c | 2 +-
src/backend/storage/buffer/bufmgr.c | 2 +-
src/backend/storage/page/bufpage.c | 2 +-
src/backend/utils/adt/mcxtfuncs.c | 6 +++---
src/backend/utils/adt/pg_locale.c | 2 +-
src/backend/utils/cache/plancache.c | 2 +-
src/backend/utils/mmgr/mcxt.c | 2 +-
src/bin/pg_dump/t/006_pg_dumpall.pl | 2 +-
src/bin/pg_upgrade/relfilenumber.c | 2 +-
src/bin/pg_upgrade/t/002_pg_upgrade.pl | 2 +-
src/bin/psql/common.c | 2 +-
src/bin/scripts/t/100_vacuumdb.pl | 2 +-
src/include/access/gin_tuple.h | 4 ++--
src/include/nodes/pathnodes.h | 2 +-
src/include/storage/aio_subsys.h | 2 +-
src/interfaces/libpq/fe-auth-oauth-curl.c | 2 +-
src/interfaces/libpq/fe-cancel.c | 2 +-
src/interfaces/libpq/fe-connect.c | 2 +-
src/interfaces/libpq/fe-protocol3.c | 2 +-
src/port/pg_localeconv_r.c | 4 ++--
src/port/pg_popcount_aarch64.c | 2 +-
src/test/modules/oauth_validator/t/002_client.pl | 3 +--
src/test/modules/test_aio/t/001_aio.pl | 2 +-
src/test/recovery/t/035_standby_logical_decoding.pl | 2 +-
src/test/subscription/t/007_ddl.pl | 2 +-
45 files changed, 68 insertions(+), 69 deletions(-)