pgsql: Tweak detail and hint messages to be consistent with project pol

Tweak detail and hint messages to be consistent with project policy

Detail and hint messages should be full sentences and should end with a
period, but some of the messages newly-introduced in v15 did not follow
that.

Author: Justin Pryzby
Reviewed-by: Álvaro Herrera
Discussion: https://postgr.es/m/20220719120948.GF12702@telsasoft.com
Backpatch-through: 15

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/12c254c99f6c6f0bbfc7997ee10ea73fee30dea2

Modified Files
--------------
contrib/basic_archive/basic_archive.c | 4 ++--
contrib/postgres_fdw/expected/postgres_fdw.out | 6 +++---
contrib/postgres_fdw/option.c | 4 ++--
src/backend/commands/publicationcmds.c | 2 +-
src/backend/commands/tablecmds.c | 2 +-
src/backend/parser/parse_expr.c | 4 ++--
src/backend/parser/parse_jsontable.c | 12 +++++------
src/backend/utils/adt/jsonpath_exec.c | 4 ++--
src/backend/utils/adt/jsonpath_gram.y | 2 +-
src/backend/utils/misc/guc.c | 2 +-
src/test/regress/expected/jsonb_sqljson.out | 28 +++++++++++++-------------
src/test/regress/expected/jsonpath.out | 2 +-
src/test/regress/expected/publication.out | 2 +-
src/test/regress/expected/sqljson.out | 10 ++++-----
src/test/regress/expected/triggers.out | 2 +-
15 files changed, 43 insertions(+), 43 deletions(-)