Merge from origin/emacs-26

63ba73a Fix documentation of ':propertize' in mode-line-format
22aa665 Reject invalid 5-byte sequences when detecting UTF-8 encoding
0d3c358 Fix 'replace-buffer-contents' in multibyte buffers
c79a627 Update etc/NEWS for mail-source-movemail-program change
63f1dc4 Improve movemail default
0b1a2ae Delete description of deleted Customize functions
fcd66d0 Keep vc-print-log from putting point at buffer end (Bug#31764)

Conflicts:
	etc/NEWS

1 files changed, 11 insertions, 0 deletions

diff --git a/test/src/editfns-tests.el b/test/src/editfns-tests.el
index 2e20c9dd126..1ed0bd5bbaf 100644
--- a/test/src/editfns-tests.el
+++ b/test/src/editfns-tests.el
@@ -288,6 +288,17 @@
                  (buffer-string)
                  "foo bar baz qux"))))))
 
+(ert-deftest replace-buffer-contents-bug31837 ()
+  (switch-to-buffer "a")
+  (insert-char (char-from-name "SMILE"))
+  (insert "1234")
+  (switch-to-buffer "b")
+  (insert-char (char-from-name "SMILE"))
+  (insert "5678")
+  (replace-buffer-contents "a")
+  (should (equal (buffer-substring-no-properties (point-min) (point-max))
+                 (concat (string (char-from-name "SMILE")) "1234"))))
+
 (ert-deftest delete-region-undo-markers-1 ()
   "Make sure we don't end up with freed markers reachable from Lisp."
   ;; https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30931#40