doc: improve wording of the need for analyze of exp. indexes

This is a followup commit on 3370207986.

Reported-by: Justin Pryzby
Discussion: https://postgr.es/m/20201112211143.GL30691@telsasoft.com

Backpatch-through: 9.5

diff --git a/doc/src/sgml/ref/create_index.sgml b/doc/src/sgml/ref/create_index.sgml
index 063d70cb4701d9a5b8a8190b14a47af278502f70..29dee5689e866525db36effc51edd2f91d7a361a 100644 (file)
--- a/doc/src/sgml/ref/create_index.sgml
+++ b/doc/src/sgml/ref/create_index.sgml
@@ -752,7 +752,7 @@ Indexes:
    For new expression indexes, it is necessary to run <link
    linkend="sql-analyze"><command>ANALYZE</command></link> or wait for
    the <link linkend="autovacuum">autovacuum daemon</link> to analyze
-   the table to generate statistics about new expression indexes.
+   the table to generate statistics for these indexes.
   </para>
 
   <para>