Update ecpg.sgml

Author: chegong18

postgresql/doc/src/sgml/ecpg.sgml

@@ -13398,7 +13398,7 @@ ____________________________________________________________________________-->
 
 <!--==========================orignal english content==========================
     <para>
-	 In typical usage, the <replaceable>string</replaceable> is a host
+     In typical usage, the <replaceable>string</replaceable> is a host
      variable reference to a string containing a dynamically-constructed
      SQL statement.  The case of a literal string is not very useful;
      you might as well just write the SQL statement directly, without
@@ -18004,7 +18004,7 @@ ____________________________________________________________________________-->
       <term><literal>ECPG_INFORMIX_DIVIDE_ZERO</literal></term>
       <listitem>
        <para>
-       如果发现尝试除零，函数会返回这个值。在内部它被定义为 -1202（<productname>Informix</productname>定义）。
+        如果发现尝试除零，函数会返回这个值。在内部它被定义为 -1202（<productname>Informix</productname>定义）。
        </para>
       </listitem>
      </varlistentry>