[COMMITTERS] pgsql: Improve plural handling in error message

Improve plural handling in error message

This does not use the normal plural handling, because no numbers appear
in the actual message.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/237a0b87b1dc90f8789aa5441a2a11e67f46c96e

Modified Files
--------------
src/backend/parser/parse_oper.c           | 5 ++++-
src/test/regress/expected/alter_table.out | 2 +-
src/test/regress/expected/create_view.out | 2 +-
src/test/regress/expected/geometry.out    | 2 +-
src/test/regress/expected/horology.out    | 2 +-
src/test/regress/expected/text.out        | 2 +-
src/test/regress/expected/timetz.out      | 2 +-
src/test/regress/expected/with.out        | 2 +-
8 files changed, 11 insertions(+), 8 deletions(-)