minor doc fix

Below I've included a minor change to the docs. It was just something that I
noticed, and wanted to make more clear. Please let me know whether minor
changes such as this one are encouraged, or wether they're more trouble than
they're worth. I will try to supply more substantial additions in the future.

Regards,
    Jeff Davis



--- runtime.sgml.original       2002-12-04 14:54:20.000000000 -0800
+++ runtime.sgml        2002-12-04 14:55:22.000000000 -0800
@@ -652,7 +652,7 @@
        had a column-specific target set via <command>ALTER TABLE SET
        STATISTICS</>.  Larger values increase the time needed to do
        <command>ANALYZE</>, but may improve the quality of the planner's
-       estimates.
+       estimates. The default value is 10.
        </para>
       </listitem>
      </varlistentry>