Take last part of format which can contain multiple '.' separated identifiers.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@36865 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_base/SkinTemplateItem/portal_skins/erp5_base/Document_getStandardFileName.xml

@@ -75,7 +75,8 @@ if context.getVersion():\n
 if context.getLanguage():\n
   file_name = \'%s-%s\' % (file_name, context.getLanguage(),)\n
 if format or original_extension:\n
-  file_name = \'%s.%s\' % (file_name, format or original_extension,)\n
+  extension = (format or original_extension).split(\'.\')[-1]\n
+  file_name = \'%s.%s\' % (file_name, extension,)\n
 return file_name\n
 </string> </value>
         </item>
@@ -120,6 +121,8 @@ return file_name\n
                             <string>None</string>
                             <string>original_extension</string>
                             <string>_getiter_</string>
+                            <string>_getitem_</string>
+                            <string>extension</string>
                           </tuple>
                         </value>
                     </item>

bt5/erp5_base/bt/revision

-794
\ No newline at end of file
+795
\ No newline at end of file