pgsql: Fix grammatical typos around possessive "its"

Fix grammatical typos around possessive "its"

Some places spelled it "it's", which is short for "it is".
In passing, fix a couple other nearby grammatical errors.

Author: Jacob Brazeal <jacob(dot)brazeal(at)gmail(dot)com>
Discussion: https://postgr.es/m/CA+COZaAO8g1KJCV0T48=CkJMjAnnfTGLWOATz+2aCh40c2Nm+g@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/128897b101e0a7bc8621abac746ea99d444d83ae

Modified Files
--------------
contrib/amcheck/verify_nbtree.c | 2 +-
src/backend/access/spgist/spgscan.c | 2 +-
src/backend/replication/logical/reorderbuffer.c | 2 +-
src/backend/replication/logical/worker.c | 2 +-
src/backend/replication/pgoutput/pgoutput.c | 4 ++--
src/backend/storage/lmgr/lock.c | 2 +-
src/backend/storage/lmgr/lwlock.c | 2 +-
src/backend/utils/adt/formatting.c | 2 +-
src/backend/utils/adt/jsonpath_exec.c | 2 +-
src/backend/utils/adt/tsrank.c | 2 +-
src/backend/utils/sort/tuplesort.c | 2 +-
src/bin/pg_combinebackup/reconstruct.c | 2 +-
src/fe_utils/parallel_slot.c | 4 ++--
src/include/jit/SectionMemoryManager.h | 2 +-
src/include/nodes/plannodes.h | 4 ++--
src/pl/plpgsql/src/pl_exec.c | 2 +-
src/test/modules/test_slru/t/001_multixact.pl | 2 +-
src/test/recovery/t/035_standby_logical_decoding.pl | 2 +-
18 files changed, 21 insertions(+), 21 deletions(-)