Обсуждение: pgsql: Doc: copy-edit "jsonb Indexing" section.

Doc: copy-edit "jsonb Indexing" section.

The patch introducing jsonpath dropped a para about that between
two related examples, and didn't bother updating the introductory
sentences that it falsified.  The grammar was pretty shaky as well.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/abed46aea4739c78802ab2ce5e93dc9a7e23c113

Modified Files
--------------
doc/src/sgml/json.sgml | 54 ++++++++++++++++++++++++++++++--------------------
1 file changed, 32 insertions(+), 22 deletions(-)