Add NEWS entries for recent autosaved buffer modification status

* doc/lispref/buffers.texi (Buffer Modification): Note 'autosaved'
value.

diff --git a/doc/lispref/buffers.texi b/doc/lispref/buffers.texi
index 3e3b0bd9f01ac525ed62dce4d9cf2e801be50fa6..8d1d9f5ddb2fd7e0ae6d4bfcb1407e195468a4b7 100644 (file)
--- a/doc/lispref/buffers.texi
+++ b/doc/lispref/buffers.texi
@@ -566,7 +566,9 @@ function @code{force-mode-line-update} works by doing this:
 
 @defun restore-buffer-modified-p flag
 Like @code{set-buffer-modified-p}, but does not force redisplay
-of mode lines.
+of mode lines.  This function also allows a @var{flag} value of
+@code{autosaved}, which marks the buffer as having been autosaved
+after the last modification.
 @end defun
 
 @deffn Command not-modified &optional arg

diff --git a/etc/NEWS b/etc/NEWS
index 5cdc9a4b3eeea03d8f60975d922031cb157d245e..8306136e5dd4c07d22046c7f7ceeb8e85bdddaee 100644 (file)
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1564,14 +1564,21 @@ Emacs buffers, like indentation and the like.  The new ert function
 \f
 * Incompatible Lisp Changes in Emacs 29.1
 
++++
+** 'buffer-modified-p' has been extended.
+This function was previously documented to return only nil or t.  This
+has been changed to nil/'autosaved'/non-nil.  The new 'autosaved'
+value means that the buffer is modified, but that it hasn't been
+modified after the last auto-save.
+
 ---
-** 'with-silent-modifications' also restores buffer modification ticks.
+** 'with-silent-modifications' also restores buffer autosave status.
 'with-silent-modifications' is a macro meant to be used by the font
 locking machinery to allow applying text properties without changing
 the modification status of the buffer.  However, it didn't restore the
-buffer modification ticks, so applying font locking to a modified
-buffer that had already been auto-saved would trigger another
-auto-saving.  This is no longer the case.
+buffer autosave status, so applying font locking to a modified buffer
+that had already been auto-saved would trigger another auto-saving.
+This is no longer the case.
 
 ---
 ** 'prin1' doesn't always escape "." and "?" in symbols any more.
@@ -1709,6 +1716,11 @@ functions.
 \f
 * Lisp Changes in Emacs 29.1
 
++++
+*** 'restore-buffer-modified-p' can now alter buffer auto-save state.
+With a FLAG value of 'autosaved', it will mark the buffer as having
+been auto-saved after the last modification.
+
 ---
 *** New minor mode 'isearch-fold-quotes-mode'.
 This sets up 'search-default-mode' so that quote characters are