pgsql: pg_upgrade: improve C comment wording

pg_upgrade: improve C comment wording

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/d826d8ecce80e318220a8a4e3d989a38397e5689

Modified Files
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contrib/pg_upgrade/check.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

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