docs: adjust simpler language for NULL return from ANY/ALL

bmomjian · bmomjian · commit f35187b3689f · 2018-11-02T13:05:30.000-04:00
Adjustment to commit 8610c97. Reported-by: Tom Lane Discussion: https://postgr.es/m/17406.1541168421@sss.pgh.pa.us Backpatch-through: 9.3
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
@@ -14621,7 +14621,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
    subquery row (including the case where the subquery returns no
    rows).
    The result is NULL if no comparison with a subquery row returns true,
-   and it returns NULL for at least one row.
+   and at least one comparison returns NULL.
   </para>
 
   <para>
@@ -14647,7 +14647,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
    (including the case where the subquery returns no rows).
    The result is <quote>false</> if any false result is found.
    The result is NULL if no comparison with a subquery row returns false,
-   and it returns NULL for at least one row.
+   and at least one comparison returns NULL.
   </para>
 
   <para>
@@ -14677,7 +14677,7 @@ WHERE EXISTS (SELECT 1 FROM tab2 WHERE col2 = tab1.col2);
    The result is <quote>false</> if the comparison returns false for any
    subquery row.
    The result is NULL if no comparison with a subquery row returns false,
-   and it returns NULL for at least one row.
+   and at least one comparison returns NULL.
   </para>
 
   <para>
