The heuristic that Emacs uses to add an `undo-boundary' has been

reworked, as it interacts poorly with functions on `post-command-hook'
or `after-change-functions'.

* lisp/simple.el: New section added.
* src/cmds.c (remove_excessive_undo_boundaries): Now in lisp.
(self_insert_command): Calls simple.el to amalgamate.
(delete_char): Calls simple.el to amalgamate.
* src/keyboard.c (last_undo_boundary): Removed.
* src/undo.c (run_undoable_change): New function.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 02109d72174..aaf52bdd1be 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -4174,7 +4174,6 @@ extern void syms_of_casetab (void);
 extern Lisp_Object echo_message_buffer;
 extern struct kboard *echo_kboard;
 extern void cancel_echoing (void);
-extern Lisp_Object last_undo_boundary;
 extern bool input_pending;
 #ifdef HAVE_STACK_OVERFLOW_HANDLING
 extern sigjmp_buf return_to_command_loop;