pgsql: Remove duplicated words split across lines in comments

Remove duplicated words split across lines in comments

This has been detected using some interesting tricks with sed, and the
method used is mentioned in details in the discussion below.

Author: Justin Pryzby
Discussion: https://postgr.es/m/20180908013109.GB15350@telsasoft.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/9226a3b89b004b3472d963442856206f0c249a53

Modified Files
--------------
src/backend/access/gin/ginbtree.c        | 2 +-
src/backend/access/transam/twophase.c    | 2 +-
src/backend/access/transam/xlogarchive.c | 2 +-
src/backend/commands/analyze.c           | 2 +-
src/backend/commands/seclabel.c          | 2 +-
src/backend/libpq/be-secure-openssl.c    | 4 ++--
src/backend/partitioning/partprune.c     | 2 +-
src/backend/storage/ipc/barrier.c        | 2 +-
src/backend/utils/adt/datetime.c         | 4 ++--
9 files changed, 11 insertions(+), 11 deletions(-)