Show example of ts_headline() using a configuration name.

doc/src/sgml/textsearch.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/textsearch.sgml,v 1.40 2007/12/13 06:32:47 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/textsearch.sgml,v 1.41 2008/03/04 03:17:18 momjian Exp $ -->
 
 <chapter id="textsearch">
  <title id="textsearch-title">Full Text Search</title>
@@ -1102,7 +1102,7 @@ StartSel=&lt;b&gt;, StopSel=&lt;/b&gt;, MaxWords=35, MinWords=15, ShortWord=3, H
     For example:
 
 <programlisting>
-SELECT ts_headline('The most common type of search
+SELECT ts_headline('english', 'The most common type of search
 is to find all documents containing given query terms 
 and return them in order of their similarity to the
 query.', to_tsquery('query &amp; similarity'));
@@ -1112,7 +1112,7 @@ query.', to_tsquery('query &amp; similarity'));
  and return them in order of their &lt;b&gt;similarity&lt;/b&gt; to the
  &lt;b&gt;query&lt;/b&gt;.
 
-SELECT ts_headline('The most common type of search
+SELECT ts_headline('english', 'The most common type of search
 is to find all documents containing given query terms
 and return them in order of their similarity to the
 query.',
@@ -1135,8 +1135,8 @@ query.',
     example:
 
 <programlisting>
-SELECT id, ts_headline(body,q), rank
-FROM (SELECT id, body, q, ts_rank_cd(ti,q) AS rank
+SELECT id, ts_headline(body, q), rank
+FROM (SELECT id, body, q, ts_rank_cd(ti, q) AS rank
       FROM apod, to_tsquery('stars') q
       WHERE ti @@ q
       ORDER BY rank DESC LIMIT 10) AS foo;