pgsql: Copyedit comments and documentation.

Copyedit comments and documentation.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/4ad6f13500cd9a3ca0652e43232f9515319e55e2

Modified Files
--------------
config/c-compiler.m4                      |  2 +-
contrib/pgstattuple/pgstatapprox.c        |  2 +-
doc/src/sgml/install-windows.sgml         |  2 +-
doc/src/sgml/release-9.3.sgml             |  2 +-
doc/src/sgml/xml2.sgml                    |  2 +-
src/backend/executor/execParallel.c       |  2 +-
src/backend/storage/buffer/README         | 12 ++++++------
src/backend/storage/buffer/bufmgr.c       |  4 ++--
src/backend/storage/freespace/freespace.c |  4 ++--
src/backend/storage/ipc/procarray.c       |  2 +-
src/backend/storage/lmgr/predicate.c      |  4 ++--
src/backend/storage/smgr/md.c             |  2 +-
src/backend/utils/adt/timestamp.c         |  2 +-
src/backend/utils/hash/dynahash.c         |  2 +-
src/pl/plperl/plperl.c                    |  2 +-
src/test/perl/TestLib.pm                  |  2 +-
src/tools/valgrind.supp                   |  2 +-
17 files changed, 25 insertions(+), 25 deletions(-)