Fix broken markup, and remove tabs

Author: alvherre

doc/src/sgml/ref/ecpg-ref.sgml

@@ -138,30 +138,33 @@ PostgreSQL documentation
        Selects run-time behavior.  <replaceable>Option</replaceable> can be
        one of the following:
        <variablelist>
-	<varlistentry>
-	 <term><option>no_indicator</option></term>
-	 <listitem>
-	 <para>
-	 Do not use indicators but instead use special values to represent
-	 NULLs. Historically there have been databases using this approach.
-	 </para>
-	</varlistentry>
-	<varlistentry>
-	 <term><option>prepare</option></term>
-	 <listitem>
-	 <para>
-	 Prepare all statements before using them. Libecpg will keep a cache of
-	 prepared statments and reuse a statement if it gets executed again. If the
-	 cache runs full, libecpg will free the least used statement.
-	 </para>
+        <varlistentry>
+         <term><option>no_indicator</option></term>
+         <listitem>
+         <para>
+         Do not use indicators but instead use special values to represent
+         NULLs. Historically there have been databases using this approach.
+         </para>
+         </listitem>
         </varlistentry>
-	<varlistentry>
-	 <term><option>questionmarks</option></term>
-	 <listitem>
-	 <para>
-	 Allow questionmark as placeholder for compatibility reasons. 
-	 This used to be the default long ago.
-	 </para>
+        <varlistentry>
+         <term><option>prepare</option></term>
+         <listitem>
+         <para>
+         Prepare all statements before using them. Libecpg will keep a cache of
+         prepared statments and reuse a statement if it gets executed again. If the
+         cache runs full, libecpg will free the least used statement.
+         </para>
+         </listitem>
+        </varlistentry>
+        <varlistentry>
+         <term><option>questionmarks</option></term>
+         <listitem>
+         <para>
+         Allow questionmark as placeholder for compatibility reasons. 
+         This used to be the default long ago.
+         </para>
+         </listitem>
         </varlistentry>
        </variablelist>
       </para>