pgsql: Message style fixes

Message style fixes

Change DETAIL messages to conform to the style guide by capitalizing
the first word of sentences and ending sentences with a period.

Author: Peter Smith <peter(dot)b(dot)smith(at)fujitsu(dot)com>
Reviewed-by: Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>
Reviewed-by: vignesh C <vignesh21.gmail.com>
Reviewed-by: Xiaopeng Wang <wxp_728.163.com>
Reviewed-by: Peter Eisentraut <peter(at)eisentraut(dot)org>
Discussion: https://www.postgresql.org/message-id/flat/CAHut%2BPszSntkUgN%2BQa9matGY6MLEoFGSuVbuKDgnnTdZ7YPRwg%40mail.gmail.com

Branch
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REL_19_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/4d529d77f8f0e2bdbd6bc2119bb09eebffd23583

Modified Files
--------------
contrib/dblink/dblink.c | 2 +-
contrib/passwordcheck/expected/passwordcheck.out | 2 +-
contrib/passwordcheck/expected/passwordcheck_1.out | 2 +-
contrib/passwordcheck/passwordcheck.c | 2 +-
contrib/pg_stash_advice/expected/pg_stash_advice.out | 2 +-
contrib/pg_stash_advice/expected/pg_stash_advice_utf8.out | 2 +-
contrib/pg_stash_advice/pg_stash_advice.c | 8 ++++----
contrib/postgres_fdw/expected/postgres_fdw.out | 2 +-
src/backend/commands/copyto.c | 2 +-
src/backend/commands/extension.c | 2 +-
src/backend/commands/tablecmds.c | 10 +++++-----
src/backend/libpq/be-secure-openssl.c | 2 +-
src/test/modules/test_extensions/expected/test_extensions.out | 2 +-
src/test/regress/expected/create_view.out | 2 +-
src/test/regress/expected/rangefuncs.out | 2 +-
15 files changed, 22 insertions(+), 22 deletions(-)