pgsql: Fix typos and duplicate words

Fix typos and duplicate words

This fixes various typos, duplicated words, and tiny bits of whitespace
mainly in code comments but also in docs.

Author: Daniel Gustafsson <daniel@yesql.se>
Author: Heikki Linnakangas <hlinnaka@iki.fi>
Author: Alexander Lakhin <exclusion@gmail.com>
Author: David Rowley <dgrowleyml@gmail.com>
Author: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/3F577953-A29E-4722-98AD-2DA9EFF2CBB8@yesql.se

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/950d4a2cb1d5f427dbccf70dbad510479cc4d8e6

Modified Files
--------------
contrib/amcheck/expected/check_btree.out            |  2 +-
contrib/amcheck/sql/check_btree.sql                 |  2 +-
contrib/amcheck/verify_nbtree.c                     |  2 +-
doc/src/sgml/maintenance.sgml                       |  2 +-
doc/src/sgml/meson.build                            |  2 +-
src/backend/access/gin/ginbtree.c                   |  2 +-
src/backend/access/heap/pruneheap.c                 |  6 +++---
src/backend/access/nbtree/nbtutils.c                |  4 ++--
src/backend/access/rmgrdesc/xactdesc.c              |  2 +-
src/backend/catalog/pg_constraint.c                 |  2 +-
src/backend/catalog/system_functions.sql            |  2 +-
src/backend/commands/amcmds.c                       |  2 +-
src/backend/commands/copyfrom.c                     |  2 +-
src/backend/commands/dbcommands.c                   |  4 ++--
src/backend/commands/tablecmds.c                    |  2 +-
src/backend/commands/vacuumparallel.c               |  2 +-
src/backend/executor/execExpr.c                     |  2 +-
src/backend/optimizer/path/equivclass.c             |  2 +-
src/backend/optimizer/path/pathkeys.c               |  2 +-
src/backend/optimizer/prep/prepunion.c              |  3 ++-
src/backend/parser/parse_jsontable.c                |  2 +-
src/backend/parser/parse_utilcmd.c                  |  4 ++--
src/backend/partitioning/partbounds.c               |  6 +++---
src/backend/partitioning/partprune.c                |  2 +-
src/backend/postmaster/launch_backend.c             |  2 +-
src/backend/postmaster/walsummarizer.c              |  2 +-
src/backend/replication/logical/slotsync.c          |  2 +-
src/backend/replication/walsender.c                 |  2 +-
src/backend/statistics/dependencies.c               |  4 ++--
src/backend/storage/aio/read_stream.c               |  6 +++---
src/backend/storage/buffer/bufmgr.c                 |  2 +-
src/backend/storage/lmgr/lock.c                     |  2 +-
src/backend/storage/lmgr/proc.c                     |  2 +-
src/backend/utils/adt/jsonpath_exec.c               |  4 ++--
src/backend/utils/adt/multirangetypes.c             |  2 +-
src/backend/utils/adt/selfuncs.c                    |  2 +-
src/backend/utils/mmgr/aset.c                       |  4 ++--
src/backend/utils/mmgr/bump.c                       |  4 ++--
src/backend/utils/mmgr/generation.c                 |  4 ++--
src/bin/pg_basebackup/bbstreamer_tar.c              |  2 +-
src/bin/pg_combinebackup/pg_combinebackup.c         |  2 +-
src/bin/pg_combinebackup/reconstruct.c              |  2 +-
src/bin/pg_upgrade/t/004_subscription.pl            |  2 +-
src/common/unicode_category.c                       |  2 +-
src/include/access/heapam_xlog.h                    | 10 +++++-----
src/include/common/hashfn_unstable.h                |  2 +-
src/include/lib/radixtree.h                         |  6 +++---
src/include/nodes/pathnodes.h                       |  2 +-
src/include/nodes/primnodes.h                       |  2 +-
src/include/storage/proc.h                          |  2 +-
src/interfaces/libpq/fe-cancel.c                    |  2 +-
src/interfaces/libpq/fe-secure-openssl.c            |  2 +-
src/test/isolation/expected/temp-schema-cleanup.out |  4 ++--
src/test/isolation/specs/temp-schema-cleanup.spec   |  2 +-
src/test/modules/test_resowner/test_resowner_many.c |  2 +-
src/test/regress/expected/aggregates.out            |  2 +-
src/test/regress/expected/copy.out                  |  4 ++--
src/test/regress/expected/foreign_key.out           |  2 +-
src/test/regress/expected/publication.out           |  4 ++--
src/test/regress/expected/tsdicts.out               |  2 +-
src/test/regress/sql/aggregates.sql                 |  2 +-
src/test/regress/sql/copy.sql                       |  4 ++--
src/test/regress/sql/foreign_key.sql                |  2 +-
src/test/regress/sql/publication.sql                |  4 ++--
src/test/regress/sql/tsdicts.sql                    |  2 +-
src/test/subscription/t/004_sync.pl                 |  2 +-
src/test/subscription/t/026_stats.pl                |  2 +-
67 files changed, 93 insertions(+), 92 deletions(-)