pgsql: doc: Assorted documentation improvements

doc: Assorted documentation improvements

A set of wording improvements and spelling fixes.

Author: Oleg Sibiryakov <o.sibiryakov@postgrespro.ru>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: /messages/by-id/e62bedb5-c26f-4d37-b4ed-ce9b55f1e980@postgrespro.ru

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/fa0ffa28778fbf4056a77f7b76361d295a737df6

Modified Files
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doc/src/sgml/config.sgml | 8 ++++----
doc/src/sgml/installation.sgml | 2 +-
doc/src/sgml/postgres-fdw.sgml | 2 +-
doc/src/sgml/postgres.sgml | 2 +-
doc/src/sgml/protocol.sgml | 2 +-
doc/src/sgml/ref/pg_recvlogical.sgml | 8 ++++----
doc/src/sgml/ref/pgbench.sgml | 2 +-
doc/src/sgml/regress.sgml | 8 ++++----
doc/src/sgml/system-views.sgml | 2 +-
doc/src/sgml/xfunc.sgml | 4 ++--
10 files changed, 20 insertions(+), 20 deletions(-)