Fix vc-hg-log-edit-toggle-amend

* lisp/vc/log-edit.el (log-edit--toggle-amend): Handle the case
when the VCS returns log entry that doesn't end with a newline
(bug#66423).

1 files changed, 4 insertions, 1 deletions

diff --git a/lisp/vc/log-edit.el b/lisp/vc/log-edit.el
index 1e249c637a6..c77f4494c1a 100644
--- a/lisp/vc/log-edit.el
+++ b/lisp/vc/log-edit.el
@@ -1219,7 +1219,10 @@ line of MSG."
       (let ((pt (point)))
         (and (zerop (forward-line 1))
              (looking-at "\n\\|\\'")
-             (let ((summary (buffer-substring-no-properties pt (1- (point)))))
+             (let ((summary (buffer-substring-no-properties pt
+                                                            (if (bolp)
+                                                                (1- (point))
+                                                              (point)))))
                (skip-chars-forward " \n")
                (delete-region pt (point))
                (log-edit-set-header "Summary" summary)))))))