bug#27121: 26.0.50; Todo-mode buffer becomes current too soon

[Stephen Berman <stephen.berman@gmx.net>]

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If you're in todo-mode and you type `q' to exit it, and in the buffer
that is now current you invoke quit-window, then the todo-mode buffer
becomes current again.  But it was supposed to have been buried by `q',
so it should not immediately become current again.

This problem is due to a faulty use of bury-buffer in commit ea3ae33b
from 2013-05-16, and it's annoyed me ever since, but I didn't bother to
do anything about it till now.


2017-05-28  Stephen Berman  <stephen.berman@gmx.net>

	Prevent buried todo-mode buffer from being current too soon

	This happened due to commit ea3ae33b from 2013-05-16, which
	prevented quitting todo-mode buffer after visiting
	todo-archive buffer from making the archive buffer current
	again.  Avoid this now by simply killing the archive buffer,
	since there's no need to keep it a live buffer.  Consequently,
	quitting a todo-mode buffer can now use bury-buffer without an
	argument, which ensures that is will not becomes current on
	quitting the next buffer.

	* lisp/calendar/todo-mode.el (todo-quit): Kill todo-archive-mode
	buffer instead of burying it.  This now allows exiting the
	todo-mode buffer with bury-buffer without an argument, so do that.



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diff --git a/lisp/calendar/todo-mode.el b/lisp/calendar/todo-mode.el
index 5d4fcf8fcb..8155a4241a 100644
--- a/lisp/calendar/todo-mode.el
+++ b/lisp/calendar/todo-mode.el
@@ -820,14 +820,10 @@ todo-quit
 	       (message "There is no todo file for this archive")))
 	   ;; When todo-check-file runs in todo-show, it kills the
 	   ;; buffer if the archive file was deleted externally.
-	   (when (buffer-live-p buf) (bury-buffer buf)))
+	   (when (buffer-live-p buf) (kill-buffer buf)))
 	  ((eq major-mode 'todo-mode)
 	   (todo-save)
-	   ;; If we just quit archive mode, just burying the buffer
-	   ;; in todo-mode would return to archive.
-	   (set-window-buffer (selected-window)
-			      (set-buffer (other-buffer)))
-	   (bury-buffer buf)))))
+	   (bury-buffer)))))
 
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In GNU Emacs 26.0.50 (build 28, x86_64-pc-linux-gnu, GTK+ Version 3.22.8)
 of 2017-05-27 built on rosalinde
Repository revision: 527a7cc9425370f7217a4d2b6914b96dff6f5ec1
Windowing system distributor 'The X.Org Foundation', version 11.0.11901000