Fix erroneous column counts in some documentation tables. Brian Gough

doc/src/sgml/datatype.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.195 2007/04/06 19:22:38 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.196 2007/04/17 17:30:34 tgl Exp $ -->
 
  <chapter id="datatype">
   <title id="datatype-title">Data Types</title>
@@ -1938,7 +1938,7 @@ January 8 04:05:06 1999 PST
 
       <table id="datatype-datetime-special-table">
        <title>Special Date/Time Inputs</title>
-       <tgroup cols="2">
+       <tgroup cols="3">
         <thead>
          <row>
           <entry>Input String</entry>

doc/src/sgml/ecpg.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/ecpg.sgml,v 1.82 2007/02/16 03:56:45 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/ecpg.sgml,v 1.83 2007/04/17 17:30:35 tgl Exp $ -->
 
 <chapter id="ecpg">
  <title><application>ECPG</application> - Embedded <acronym>SQL</acronym> in C</title>
@@ -1485,7 +1485,7 @@ int PGTYPESdate_defmt_asc(date *d, char *fmt, char *str);
         you an idea of how to use this function.
         <table>
          <title>Valid input formats for <function>rdefmtdate</function></title>
-         <tgroup cols="2">
+         <tgroup cols="3">
           <thead>
            <row>
             <entry>fmt</entry>