bug#31764: 26.1; Point in VC change log is not centered as documented

[Noam Postavsky]

tags 31764 + patch
quit

Eli Zaretskii <eliz@gnu.org> writes:

>> I can reproduce this on GNU/Linux, but not on Windows (both tested with
>> latest emacs-26).
>
> Isn't that strange?  The code involved isn't platform specific.

Looks like a matter of timing, if I add a (sit-for 1) to beginning of
vc-exec-after (or use edebug), then I can reproduce on Windows too.
Adding a save-excursion seems to fix it.

>From 895d29eb6b010093245a67d7f05808d765195b7a Mon Sep 17 00:00:00 2001
From: Noam Postavsky <npostavs@gmail.com>
Date: Mon, 11 Jun 2018 20:00:54 -0400
Subject: [PATCH v1] Keep vc-print-log from putting point at buffer end
 (Bug#31764)

* lisp/vc/vc.el (vc-print-log-internal): Use `save-excursion' around
`vc-print-log-setup-buttons'.
---
 lisp/vc/vc.el | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
index 93e9c25cbf..41a76e0007 100644
--- a/lisp/vc/vc.el
+++ b/lisp/vc/vc.el
@@ -2256,8 +2256,9 @@ vc-print-log-internal
         (vc-call-backend bk 'print-log files-arg buf shortlog
                           (when is-start-revision working-revision) limit))
        (lambda (_bk _files-arg ret)
-        (vc-print-log-setup-buttons working-revision
-                                    is-start-revision limit ret))
+         (save-excursion
+           (vc-print-log-setup-buttons working-revision
+                                       is-start-revision limit ret)))
        ;; When it's nil, point really shouldn't move (bug#15322).
        (when working-revision
          (lambda (bk)
-- 
2.11.0