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):