Remove tabs from SGML file.

doc/src/sgml/backup.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.126 2009/05/14 20:31:09 heikki Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.127 2009/05/27 12:28:55 momjian Exp $ -->
 
 <chapter id="backup">
  <title>Backup and Restore</title>
@@ -1130,21 +1130,21 @@ restore_command = 'copy "C:\\server\\archivedir\\%f" "%p"'  # Windows
       <term><varname>recovery_end_command</varname> (<type>string</type>)</term>
       <listitem>
        <para>
-		This parameter specifies a shell command that will be executed once only
-		at the end of recovery. This parameter is optional. The purpose of the
-		recovery_end_command is to provide a mechanism for cleanup following
-		replication or recovery. 
-		Any <literal>%r</> is replaced by the name of the file
-		containing the last valid restart point. That is the earliest file that
-		must be kept to allow a restore to be restartable, so this information
-		can be used to truncate the archive to just the minimum required to
-		support restart of the current restore. <literal>%r</> would only be
-		used in a warm-standby configuration  (see <xref linkend="warm-standby">). 
+        This parameter specifies a shell command that will be executed once only
+        at the end of recovery. This parameter is optional. The purpose of the
+        recovery_end_command is to provide a mechanism for cleanup following
+        replication or recovery. 
+        Any <literal>%r</> is replaced by the name of the file
+        containing the last valid restart point. That is the earliest file that
+        must be kept to allow a restore to be restartable, so this information
+        can be used to truncate the archive to just the minimum required to
+        support restart of the current restore. <literal>%r</> would only be
+        used in a warm-standby configuration  (see <xref linkend="warm-standby">). 
         Write <literal>%%</> to embed an actual <literal>%</> character
         in the command.
-		If the command returns a non-zero exit status then a WARNING log
-		message will be written, unless signalled in which case we return
-		a FATAL error.
+        If the command returns a non-zero exit status then a WARNING log
+        message will be written, unless signalled in which case we return
+        a FATAL error.
        </para>
       </listitem>
      </varlistentry>