diff --git a/reference/errorfunc/functions/debug-backtrace.xml b/reference/errorfunc/functions/debug-backtrace.xml
index 5c7e30ea37..9f98c51c61 100644
--- a/reference/errorfunc/functions/debug-backtrace.xml
+++ b/reference/errorfunc/functions/debug-backtrace.xml
@@ -5,7 +5,7 @@
   <refname>debug_backtrace</refname>
   <refpurpose>Generates a backtrace</refpurpose>
  </refnamediv>
-
+ 
  <refsect1 role="description">
   &reftitle.description;
   <methodsynopsis>
@@ -16,7 +16,7 @@
    <function>debug_backtrace</function> generates a PHP backtrace.
   </para>
  </refsect1>
-
+ 
  <refsect1 role="parameters"><!-- {{{ -->
   &reftitle.parameters;
   <para>
@@ -27,34 +27,34 @@
       <para>
        Since 5.3.6, this parameter is a bitmask for the following options:
        <table>
-	        <title><function>debug_backtrace</function> options</title>
-	        <tgroup cols="2">
-	         <tbody>
-	          <row>
-	           <entry>DEBUG_BACKTRACE_PROVIDE_OBJECT</entry>
-	           <entry>
-	            Whether or not to populate the "object" index.
-	           </entry>
-	          </row>
-	          <row>
-	           <entry>DEBUG_BACKTRACE_IGNORE_ARGS</entry>
-	           <entry>
-	            Whether or not to omit the "args" index and thus all the method arguments to
-			    to save memory.
-	           </entry>
-	          </row>
-	        </tbody>
-	       </tgroup>
-	   </table>
-	   Before 5.3.6, only value recognized is &true; or &false;, which is the same as 
-	   setting and unsetting <constant>DEBUG_BACKTRACE_PROVIDE_OBJECT</constant> option.
+        <title><function>debug_backtrace</function> options</title>
+        <tgroup cols="2">
+         <tbody>
+          <row>
+           <entry>DEBUG_BACKTRACE_PROVIDE_OBJECT</entry>
+           <entry>
+            Whether or not to populate the "object" index.
+           </entry>
+          </row>
+          <row>
+           <entry>DEBUG_BACKTRACE_IGNORE_ARGS</entry>
+           <entry>
+            Whether or not to omit the "args" index and thus all the method arguments to
+            to save memory.
+           </entry>
+          </row>
+         </tbody>
+        </tgroup>
+       </table>
+       Before 5.3.6, only value recognized is &true; or &false;, which is the same as 
+       setting and unsetting <constant>DEBUG_BACKTRACE_PROVIDE_OBJECT</constant> option.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
   </para>
  </refsect1><!-- }}} -->
-
+ 
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
@@ -133,7 +133,7 @@
    </table>
   </para>
  </refsect1>
-
+ 
  <refsect1 role="changelog">
   &reftitle.changelog;
   <para>
@@ -150,7 +150,7 @@
        <entry>5.3.6</entry>
        <entry>
         The parameter <parameter>provide_object</parameter> changed to <parameter>options</parameter> and additional option
-		<constant>DEBUG_BACKTRACE_IGNORE_ARGS</constant> is added.
+        <constant>DEBUG_BACKTRACE_IGNORE_ARGS</constant> is added.
        </entry>
       </row>
       <row>
@@ -170,7 +170,7 @@
    </informaltable>
   </para>
  </refsect1>
-
+ 
  <refsect1 role="examples">
   &reftitle.examples;
   <para>
@@ -198,7 +198,7 @@ include_once '/tmp/a.php';
     </programlisting>
     <para>
      Results similar to the following when executing
-    <filename>/tmp/b.php</filename>:
+     <filename>/tmp/b.php</filename>:
     </para>
     <screen>
 <![CDATA[
@@ -230,7 +230,7 @@ array(4) {
    </example>
   </para>
  </refsect1>
-
+ 
  <refsect1 role="seealso">
   &reftitle.seealso;
   <para>