Collapse successive char deletions in the undo log

* src/cmds.c (remove_excessive_undo_boundaries): New function,
extracted from Fself_insert_command.
(Fdelete_char, Fself_insert_command): Use it.
* src/fileio.c (Fmake_symbolic_link): Rename arg to `target'.
* src/keyboard.c (syms_of_keyboard): `top-level' shouldn't be special.

1 files changed, 3 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 03d4ced6dd4..13cd512cb5e 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -201,6 +201,9 @@ font, and (iii) the specified window.
 
 * Editing Changes in Emacs 25.1
 
+** Successive single-char deletions are collapsed in the undo-log just like
+successive char insertions.
+
 ** Unicode names entered via C-x 8 RET now use substring completion by default.
 
 ** New minor mode global-eldoc-mode is enabled by default.