revert tree string in order to translate properli secs, mins and hours ago...

revert tree string in order to translate properli secs, mins and hours ago into few parts of interface

forum/templatetags/extra_tags.py

@@ -167,11 +167,11 @@ def diff_date(date, limen=2):
     elif days == 1:
         return _('yesterday')
     elif minutes >= 60:
-        return ungettext("%(hr)d hour ago", "%(hr)d hours ago", hours) % {'hr':hours}
+        return ungettext('%(hr)d ' + _("hour ago"), '%(hr)d ' + _("hours ago"), hours) % {'hr':hours}
     elif diff.seconds >= 60:
-        return ungettext("%(min)d min ago", "%(min)d mins ago", minutes) % {'min':minutes}
+        return ungettext('%(min)d ' + _("min ago"), '%(min)d ' + _("mins ago"), minutes) % {'min':minutes}
     else:
-        return ungettext("%(sec)d sec ago", "%(sec)d secs ago", diff.seconds) % {'sec':diff.seconds}
+        return ungettext('%(sec)d ' + _("sec ago"), '%(sec)d ' + _("secs ago"), diff.seconds) % {'sec':diff.seconds}
 
 @register.simple_tag
 def media(url):