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 06d44c51719c32aa5bb2ff4ae8618b397bbfa251..d5345e489feb3f5d16aceac6496de4df5aeafe2f 100644 (file)
--- a/doc/src/sgml/ref/create_index.sgml
+++ b/doc/src/sgml/ref/create_index.sgml
@@ -575,7 +575,7 @@ 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>