Обсуждение: pgsql: doc: Simplify mention of unique indexes for NULL control

doc:  Simplify mention of unique indexes for NULL control

Discussion: https://postgr.es/m/2304.1586532634@sss.pgh.pa.us

Backpatch-through: 9.5

Branch
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REL_12_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/388d7f8c62b407005f56b6262a678d9fb96ea18c

Modified Files
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doc/src/sgml/indices.sgml | 22 +++-------------------
1 file changed, 3 insertions(+), 19 deletions(-)