Doc: fix mistaken reference to "PG_ARGNULL_xxx()" macro.
authorTom Lane <tgl@sss.pgh.pa.us>
Fri, 13 Mar 2020 16:49:10 +0000 (12:49 -0400)
committerTom Lane <tgl@sss.pgh.pa.us>
Fri, 13 Mar 2020 16:49:10 +0000 (12:49 -0400)
commit00f38866f7e966ac4c48c6b027e2666c3ab29398
treee1c1054f6906844322fb8de109ae54b66fb015d6
parent02530da73f0438f7c2073267de6fe2be84f592d7
Doc: fix mistaken reference to "PG_ARGNULL_xxx()" macro.

This should of course be just "PG_ARGISNULL()".

Also reorder a couple of paras to make the discussion of PG_ARGISNULL
less disjointed.

Back-patch to v10 where the error was introduced.

Laurenz Albe and Tom Lane, per an anonymous docs comment

Discussion: https://postgr.es/m/158399487096.5708.10696365251766477013@wrigleys.postgresql.org
doc/src/sgml/xfunc.sgml