Update psql docs for recent octal-only string behavior.

doc/src/sgml/ref/psql-ref.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.136 2005/05/29 03:32:18 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.137 2005/05/30 15:24:23 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -589,11 +589,8 @@ testdb=&gt;
     single quote. To include a single quote into such an argument,
     precede it by a backslash. Anything contained in single quotes is
     furthermore subject to C-like substitutions for
-    <literal>\n</literal> (new line), <literal>\t</literal> (tab),
-    <literal>\</literal><replaceable>digits</replaceable>,
-    <literal>\0</literal><replaceable>digits</replaceable>, and
-    <literal>\0x</literal><replaceable>digits</replaceable> (the
-    character with the given decimal, octal, or hexadecimal code).
+    <literal>\n</literal> (new line), <literal>\t</literal> (tab), and
+    <literal>\</literal><replaceable>digits</replaceable> (octal).
     </para>
 
     <para>
@@ -2367,12 +2364,7 @@ testdb=&gt; <userinput>\set content '\'' `sed -e "s/'/\\\\\\'/g" &lt; my_file.tx
         <term><literal>%</literal><replaceable class="parameter">digits</replaceable></term>
         <listitem>
         <para>
-        The character with the indicated numeric code is substituted.
-        If <replaceable class="parameter">digits</replaceable> starts
-        with <literal>0x</literal> the rest of the characters are
-        interpreted as hexadecimal; otherwise if the first digit is
-        <literal>0</literal> the digits are interpreted as octal;
-        otherwise the digits are read as a decimal number.
+        The character with the indicated octal code is substituted.
         </para>
         </listitem>
       </varlistentry>