doc: fix description of backward_scan
authorAndrew Gierth
Thu, 17 May 2018 20:19:57 +0000 (21:19 +0100)
committerAndrew Gierth
Thu, 17 May 2018 20:19:57 +0000 (21:19 +0100)
commit4a9b44d3c075fe73661d0407faf6f048075a00f9
treeb5d792f447e2a7a2557c6296fa7ace4752c54755
parentace3c7cc0518269733c37b37b7aebb9adec2454e
doc: fix description of backward_scan

The description of the index property backward_scan was incorrect and
misleading; rectify.

Backpatch to 9.6 where the amutils functionality was introduced.
doc/src/sgml/func.sgml