Fix nbtree deduplication README commentary.

Peter Geoghegan <pg@bowt.ie>

Commit: b150a76793109b00ea43c26e0006b3cad9030096
Author: Peter Geoghegan <pg@bowt.ie>
Date: 2020-03-24T21:58:27Z
Releases: 13.0
Fix nbtree deduplication README commentary.

Descriptions of some aspects of how deduplication works were unclear in
a couple of places.

Files

PathChange+/−
src/backend/access/nbtree/README modified +24 −21