pgsql: Fix typos in comments, code and documentation

Fix typos in comments, code and documentation

While on it, newlines are removed from the end of two elog() strings.
The others are simple grammar mistakes.  One comment in pg_upgrade
referred incorrectly to sequences since a7e5457.

Author: Justin Pryzby
Discussion: https://postgr.es/m/20221230231257.GI1153@telsasoft.com
Backpatch-through: 11

Branch
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REL_11_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/a80740a7c9792a622e5ebb75010ea48a5521bf56

Modified Files
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doc/src/sgml/parallel.sgml                | 2 +-
doc/src/sgml/ref/alter_table.sgml         | 2 +-
doc/src/sgml/sources.sgml                 | 4 ++--
src/backend/access/common/bufmask.c       | 2 +-
src/backend/jit/llvm/llvmjit.c            | 2 +-
src/backend/optimizer/util/tlist.c        | 2 +-
src/bin/pg_upgrade/info.c                 | 9 ++++-----
src/test/regress/expected/expressions.out | 2 +-
src/test/regress/sql/expressions.sql      | 2 +-
9 files changed, 13 insertions(+), 14 deletions(-)