[DOCUMENTATION] remove one quotation mark because maybe typo

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@16281 44c647ce-9c0f-0410-b52a-842ac1e357ba

documentation/manual/en/module_specs/Zend_Tool_Framework-Introduction.xml

@@ -58,7 +58,7 @@
 
         <listitem>
             <para>
-                <emphasis>A standard set of system providers"</emphasis> that
+                <emphasis>A standard set of system providers</emphasis> that
                 allow the system to report what the full capabilities of the
                 system are as well as provide useful feedback. This also
                 includes a comprehensive "Help System".