Wording improvement.

Author: bmomjian

doc/src/sgml/func.sgml

@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.363 2007/02/19 18:20:06 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.364 2007/02/19 22:10:52 momjian Exp $ -->
 
  <chapter id="functions">
   <title>Functions and Operators</title>
@@ -4846,7 +4846,7 @@ SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1,3})');
      <listitem>
       <para>
         <function>to_char(..., 'ID')</function>'s day of the week numbering
-        matches the <function>extract('isodow', ...)</function> function.
+        matches the <function>extract('isodow', ...)</function> function, but
         <function>to_char(..., 'D')</function>'s does not match
         <function>extract('dow', ...)</function>'s day numbering.
       </para>