pgsql: Update obsolete row compare preprocessing comments.

From: Peter Geoghegan <pg(at)bowt(dot)ie>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: Update obsolete row compare preprocessing comments.
Date: 2025-07-02 16:38:18
Message-ID: E1uX0TS-004NYo-03@gemulon.postgresql.org
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Update obsolete row compare preprocessing comments.

Restore nbtree preprocessing comments describing how we mark nbtree row
compare members required to how they were prior to 2016 bugfix commit
a298a1e0.

Oversight in commit bd3f59fd, which made nbtree preprocessing revert to
the original 2006 rules, but neglected to revert these comments.

Backpatch-through: 18

Branch
------
REL_18_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/4938737d5452fc4975f985a0a6faf43a360ef021

Modified Files
--------------
src/backend/access/nbtree/nbtpreprocesskeys.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

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