vc-checkin (RCS) always. Problem with vc-checkin

[Uwe Brauer <oub@mat.ucm.es>]

Hello


I asked this some days ago in Emacs.help. However the answer given did
not work of me, so I hope somebody in this list might now the answer.



http://www.emacswiki.org/emacs/VersionControlAlways

(defun ensure-in-vc-or-check-in ()
  "Automatically checkin file ,v can be in the same directory or in the
subdirectory RCS. The idea is  to call that function only for files
not for buffers. See the function ensure-in-vc-or-check-in-modes  
which could be use in an apropriate HOOK."
  (interactive)
  (when (buffer-file-name)   
	(if (or (and (file-exists-p (format "%s,v" (buffer-file-name))))
(and (file-exists-p (format "RCS/%s,v" (file-name-nondirectory buffer-file-name)))))
  (let ((p (point)))
		(progn
			(vc-checkin (buffer-file-name) nil "")
			(vc-toggle-read-only) 
			(message "Checked in"))
		    (goto-char p))
	  (progn
		  (message "You need to check this in! ")))))


The point is the code works for a old version of VC, however for GNU
emacs 25
(vc-checkin (buffer-file-name) nil "")

does not work any more.

The docstring for the old function said:
(vc-checkin FILE &optional REV COMMENT INITIAL-CONTENTS)
file for the new function:
(vc-checkin FILES BACKEND &optional COMMENT INITIAL-CONTENTS)
so I thought

(vc-checkin (buffer-file-name) 'RCS nil "")
or
(vc-checkin (buffer-file-name) 'RCS  "")

Should work, however it does not. The following error is given
 vc-delistify seems the culprit, but I am stack.


Thanks

Uwe Brauer


--8<---------------cut here---------------start------------->8---

Debugger entered--Lisp error: (wrong-type-argument sequencep 47)
  mapconcat(identity
  "/home/oub/emacs/site-lisp/versch/vc-ensure-checkin.el" " ")
  vc-delistify("/home/oub/emacs/site-lisp/versch/vc-ensure-checkin.el")
  #[514
  "\303\304\305!\"\210\211\203