Fix a minor typo in the log_line_prefix docs and make a couple other

tiny improvements.

doc/src/sgml/runtime.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.252 2004/03/23 01:23:48 tgl Exp $
+$PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.253 2004/03/24 03:48:41 neilc Exp $
 -->
 
 <Chapter Id="runtime">
@@ -2000,7 +2000,7 @@ SET ENABLE_SEQSCAN TO OFF;
       <term><varname>log_line_prefix</varname> (<type>string</type>)</term>
       <listitem>
        <para>
-	 This is a <literal>printf</>-style string that is output at the
+	 This is a <function>printf</>-style string that is output at the
 	 beginning of each log line. The default is an empty string.
 	 Each recognized escape is replaced as outlined 
 	 below - anything else that looks like an escape is ignored. Other
@@ -2081,7 +2081,7 @@ SET ENABLE_SEQSCAN TO OFF;
 	    </row>
 	    <row>
 	     <entry><literal>%%</literal></entry>
-	     <entry>literal <literal>%</></entry>
+	     <entry>Literal <literal>%</></entry>
 	     <entry>No</entry>
 	    </row>
 	   </tbody>