GNU Emacs NEWS -- history of user-visible changes.

Copyright (C) 2021-2022 Free Software Foundation, Inc.
See the end of the file for license conditions.

Please send Emacs bug reports to 'bug-gnu-emacs@gnu.org'.
If possible, use 'M-x report-emacs-bug'.

This file is about changes in Emacs version 30.

See file HISTORY for a list of GNU Emacs versions and release dates.
See files NEWS.29, NEWS.28, ..., NEWS.18, and NEWS.1-17 for changes
in older Emacs versions.

You can narrow news to a specific version by calling 'view-emacs-news'
with a prefix argument or by typing 'C-u C-h C-n'.

Temporary note:
+++ indicates that all relevant manuals in doc/ have been updated.
--- means no change in the manuals is needed.
When you add a new item, use the appropriate mark if you are sure it
applies, and please also update docstrings as needed.

\f
* Installation Changes in Emacs 30.1

\f
* Startup Changes in Emacs 30.1

\f
* Changes in Emacs 30.1

** X selection requests are now handled much faster and asynchronously.
This means it should be less necessary to disable the likes of
`select-active-regions' when Emacs is running over a slow network
connection.

** Emacs now updates invisible frames that are made visible by a compositor.
If an invisible or an iconified frame is shown to the user by the
compositing manager, Emacs will now redisplay such a frame even though
'frame-visible-' returns nil or 'icon' for it.  This can happen, for
example, as part of preview for iconified frames.

\f
* Editing Changes in Emacs 30.1

** New helper 'transpose-sexps-function'
Emacs now can set this defvar to customize the behavior of the
'transpose-sexps' function.

** New function 'treesit-transpose-sexps'
treesit.el now unconditionally sets 'transpose-sexps-function' for all
Tree-sitter modes.  This functionality utilizes the new
'transpose-sexps-function'.

\f
* Changes in Specialized Modes and Packages in Emacs 30.1
---
** Variable order and truncation can now be configured in gdb-many-window mode.
The new variable 'gdb-locals-table-row-config' allows users to
configure the order and max length of various properties in the local
variables buffer when using 'gdb-many-windows'.

By default, this variable is set to write the properties in the order:
name, type and value, where the name and type are truncated to 20
characters, and the value is truncated according to the value of
'gdb-locals-value-limit'.

If you want to get back the old behavior, set
'gdb-locals-table-row-config' to  the value

  ((type . 0)(name . 0)(value . ,gdb-locals-value-limit)).

** VC

---
*** New user option 'vc-git-shortlog-switches'.
This is a string or a list of strings that specifies the Git log
switches for shortlogs, such as the one produced by 'C-x v L'.
'vc-git-log-switches' is no longer used for shortlogs.

** bs

---
*** New user option 'bs-default-action-list'.
You can now configure how to display the "*buffer-selection*" buffer
using this new option.  (Or set 'display-buffer-alist' directly.)

** Eshell

+++
*** New splice operator for Eshell dollar expansions.
Dollar expansions in Eshell now let you splice the elements of the
expansion in-place using '$@expr'.  This makes it easier to fill lists
of arguments into a command, such as when defining aliases.  For more
information, see the "(eshell) Dollars Expansion" node in the Eshell
manual.

+++
*** 'eshell-read-aliases-list' is now an interactive command.
After manually editing 'eshell-aliases-file', you can use
'M-x eshell-read-aliases-list' to load the edited aliases.

** Prog Mode
+++
*** New command 'prog-fill-reindent-defun'
This command either fills a single paragraph in a defun, such as a
doc-string, or a comment, or (re)indents the surrounding defun if
point is not in a comment or a string.  It is by default bound to
'M-q' in 'prog-mode' and all its descendants.
\f
* New Modes and Packages in Emacs 30.1

\f
* Incompatible Lisp Changes in Emacs 30.1

\f
* Lisp Changes in Emacs 30.1

\f
* Changes in Emacs 30.1 on Non-Free Operating Systems

\f
----------------------------------------------------------------------
This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

\f
Local variables:
coding: utf-8
mode: outline
mode: emacs-news
paragraph-separate: "[	 \f]"
end: