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

bmomjian · bmomjian · commit d8395970ea9b · 2020-11-16T10:26:17.000-05:00
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
@@ -748,7 +748,7 @@ 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>
