added Reviewed note and one fix

Author: ManueldG

reference/errorfunc/functions/debug-backtrace.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- EN-Revision: e203b12d7964aa7c729e1f7c26fcbf357fc9fb63 Maintainer: ManueldG Status: ready -->
+<!-- Reviewed: no -->
 <!-- CREDITS: cucinato -->
 <refentry xml:id="function.debug-backtrace" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
@@ -50,7 +51,7 @@
        </table>
        <note>
         <para>
-         Ci sono quattro possibilità:
+         Ci sono quattro possibili combinazioni:
          <table>
           <title>Opzioni di <function>debug_backtrace</function> </title>
           <tgroup cols="2">