pgsql: Fix duplicated words in comments

Fix duplicated words in comments

Author: Stephen Amell
Discussion: https://postgr.es/m/539fa271-21b3-777e-a468-d96cffe9c768@gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7e19929ea29668f3d01280262e407b93042c959a

Modified Files
--------------
src/backend/executor/execExpr.c                 | 2 +-
src/backend/replication/logical/reorderbuffer.c | 2 +-
src/include/c.h                                 | 2 +-
src/include/jit/llvmjit_emit.h                  | 4 ++--
src/include/nodes/execnodes.h                   | 2 +-
src/include/replication/logical.h               | 2 +-
6 files changed, 7 insertions(+), 7 deletions(-)