(defun gnus-group-get-new-news-this-group (&optional n dont-scan)
"Check for newly arrived news in the current group (and the N-1 next groups).
The difference between N and the number of newsgroup checked is returned.
-If N is negative, this group and the N-1 previous groups will be checked."
+If N is negative, this group and the N-1 previous groups will be checked.
+If DONT-SCAN is non-nil, scan non-activated groups as well."
(interactive "P")
(let* ((groups (gnus-group-process-prefix n))
(ret (if (numberp n) (- n (length groups)) 0))