NEWS.27 134 KB
Newer Older
Eli Zaretskii's avatar
Eli Zaretskii committed
1 2
GNU Emacs NEWS -- history of user-visible changes.

Paul Eggert's avatar
Paul Eggert committed
3
Copyright (C) 2017-2020 Free Software Foundation, Inc.
Eli Zaretskii's avatar
Eli Zaretskii committed
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
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 27.

See file HISTORY for a list of GNU Emacs versions and release dates.
See files NEWS.26, NEWS.25, ..., 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.


* Installation Changes in Emacs 27.1

Glenn Morris's avatar
Glenn Morris committed
27
---
Eli Zaretskii's avatar
Eli Zaretskii committed
28 29 30 31 32 33
** Emacs now uses GMP, the GNU Multiple Precision library.
By default, if 'configure' does not find a suitable libgmp, it
arranges for the included mini-gmp library to be built and used.
The new 'configure' option '--without-libgmp' uses mini-gmp even if a
suitable libgmp is available.

Glenn Morris's avatar
Glenn Morris committed
34
---
Eli Zaretskii's avatar
Eli Zaretskii committed
35 36 37 38 39 40 41 42 43 44 45 46
** Emacs can now use HarfBuzz as its shaping engine.
The new configure option '--with-harfbuzz' adds support for the
HarfBuzz text shaping engine.  It is on by default; use './configure
--without-harfbuzz' to build without it.  The HarfBuzz text shaping is
available via new font backend drivers 'xfthb' and 'ftcrhb' for Xft
and Cairo drawings, respectively, and via the 'harfbuzz' backend on
MS-Windows.  The Harfbuzz text shaping is preferred to the previously
supported ones, so the font backends that use older shaping engines
(FLT on GNU and Unix systems and Uniscribe on MS-Windows) are not
enabled by default; they can be enabled via the 'font-backend' frame
parameter or via X resources.

Glenn Morris's avatar
Glenn Morris committed
47 48 49 50 51 52 53
---
** The new configure option '--with-json' adds native support for JSON.
This uses the Jansson library.  The option is on by default; use
'./configure --with-json=no' to build without Jansson support.  The
new JSON functions 'json-serialize', 'json-insert',
'json-parse-string', and 'json-parse-buffer' are typically much faster
than their Lisp counterparts from json.el.
Eli Zaretskii's avatar
Eli Zaretskii committed
54

Glenn Morris's avatar
Glenn Morris committed
55
---
Eli Zaretskii's avatar
Eli Zaretskii committed
56 57
** The configure option '--with-cairo' is no longer experimental.
This builds Emacs with Cairo drawing, and supports built-in printing
Glenn Morris's avatar
Glenn Morris committed
58
when Emacs is built with GTK+.  Some severe bugs in this build were
Glenn Morris's avatar
Glenn Morris committed
59 60 61 62
fixed, and we can therefore offer this to users without caveats.  Note
that building with Cairo enabled results in using Pango instead of
libXft for font support, and that Pango 1.44 has removed support for
bitmapped fonts.
Eli Zaretskii's avatar
Eli Zaretskii committed
63 64 65 66 67 68 69 70 71

+++
** Emacs now uses a "portable dumper" instead of unexec.
This improves compatibility with memory allocation on modern systems,
and in particular better supports the Address Space Layout
Randomization (ASLR) feature, a security technique used by most modern
operating systems.

When built with the portable dumping support (which is the default),
Glenn Morris's avatar
Glenn Morris committed
72
Emacs looks for the "emacs.pdmp" file, generated during the build, in
Eli Zaretskii's avatar
Eli Zaretskii committed
73
its data directory at startup, and loads the dumped state from there.
Glenn Morris's avatar
Glenn Morris committed
74 75
The new command-line argument '--dump-file=FILE' allows specifying a
non-default ".pdmp" file to load the state from; see the node
Glenn Morris's avatar
Glenn Morris committed
76
"(emacs) Initial Options" in the Emacs manual for more information.
Eli Zaretskii's avatar
Eli Zaretskii committed
77 78

An Emacs started via a dump file can create a new dump file only if it
Glenn Morris's avatar
Glenn Morris committed
79 80
was invoked with the '-batch' option.  (This is a temporary
limitation; we plan on lifting it in a future release.)
Eli Zaretskii's avatar
Eli Zaretskii committed
81 82 83 84 85

Although the portable dumper has been tested, it may have a bug on
unusual platforms.  If you require traditional unexec dumping you can
use the configure-time option '--with-dumping=unexec'; however, please
file a bug report describing the situation, as unexec dumping is
Glenn Morris's avatar
Glenn Morris committed
86
deprecated, and we plan on removing it in some future release.
Eli Zaretskii's avatar
Eli Zaretskii committed
87

Glenn Morris's avatar
Glenn Morris committed
88
---
Eli Zaretskii's avatar
Eli Zaretskii committed
89 90 91 92
** The new configure option '--enable-checking=structs' attempts to
check that the portable dumper code has been updated to match the last
change to one of the data structures that it relies on.

Glenn Morris's avatar
Glenn Morris committed
93
---
Eli Zaretskii's avatar
Eli Zaretskii committed
94 95 96 97
** The configure options '--enable-checking=conslist' and
'--enable-checking=xmallocoverrun' have been withdrawn.  The former
made Emacs irredeemably slow, and the latter made it crash.  Neither
option was useful with modern debugging tools such as AddressSanitizer.
Glenn Morris's avatar
Glenn Morris committed
98
(See "etc/DEBUG" for the details of using the modern replacements of the
Eli Zaretskii's avatar
Eli Zaretskii committed
99 100
removed configure options.)

Glenn Morris's avatar
Glenn Morris committed
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
---
** Emacs no longer defaults to using ImageMagick to display images.
This is due to security and stability concerns with ImageMagick.  To
override the default, use 'configure --with-imagemagick'.

---
** Several configure options now accept an option-argument 'ifavailable'.
For example, './configure --with-xpm=ifavailable' now configures Emacs
to attempt to use libxpm but to continue building even if libxpm is
absent.  The other affected options are '--with-gif', '--with-gnutls',
'--with-jpeg', '--with-png', and '--with-tiff'.

---
** The 'etags' program now uses the C library's regular expression matcher.
If it's possible, 'etags' will use the regexp matcher from the
system's standard C library, otherwise it will be linked with a
compatible regex substitute.  This lets developers maintain Emacs's
own regex code without having to also support other programs.  The new
configure option '--without-included-regex' forces 'etags' to use the C
library's regex matcher even if the regex substitute ordinarily would
be used to work around compatibility problems.

---
** Emacs has been ported to the '-fcheck-pointer-bounds' option of GCC.
This causes Emacs to check bounds of some arrays addressed by its
internal pointers, which can be helpful when debugging the Emacs
interpreter or modules that it uses.  If your platform supports it you
can enable it when configuring, e.g., './configure CFLAGS="-g3 -O2
-mmpx -fcheck-pointer-bounds"' on Intel MPX platforms.

---
** Emacs now normally uses a C pointer type instead of a C integer
type to implement Lisp_Object, which is the fundamental machine word
type internal to the Emacs Lisp interpreter.  This change aims to
catch typos and supports '-fcheck-pointer-bounds'.  The 'configure'
option '--enable-check-lisp-object-type' is therefore no longer as
useful and so is no longer enabled by default in developer builds,
to reduce differences between developer and production builds.

---
Eli Zaretskii's avatar
Eli Zaretskii committed
141 142 143 144 145 146 147
** The distribution tarball now has test cases; 'make check' runs them.
This is intended mostly to help developers.

---
** Emacs now requires GTK 2.24 and GTK 3.10 for the GTK 2 and GTK 3
builds respectively.

Glenn Morris's avatar
Glenn Morris committed
148
---
Eli Zaretskii's avatar
Eli Zaretskii committed
149 150
** New make target 'help' shows a summary of common make targets.

Glenn Morris's avatar
Glenn Morris committed
151 152 153 154
---
** Emacs now builds with dynamic module support by default.
Pass '--without-modules' to 'configure' to disable dynamic module
support.
Eli Zaretskii's avatar
Eli Zaretskii committed
155

Glenn Morris's avatar
Glenn Morris committed
156 157 158 159
---
** The ftx font backend driver is now obsolete and will be removed in
Emacs 28.

Eli Zaretskii's avatar
Eli Zaretskii committed
160 161 162 163

* Startup Changes in Emacs 27.1

+++
Glenn Morris's avatar
Glenn Morris committed
164 165 166 167 168
** Emacs can now use the XDG convention for init files.
The 'XDG_CONFIG_HOME' environment variable (which defaults to
"~/.config") specifies the XDG configuration parent directory.  Emacs
checks for "init.el" and other configuration files inside the "emacs"
subdirectory of 'XDG_CONFIG_HOME', i.e. "$XDG_CONFIG_HOME/emacs/init.el"
Eli Zaretskii's avatar
Eli Zaretskii committed
169

Glenn Morris's avatar
Glenn Morris committed
170 171 172 173 174
However, Emacs will still initially look for init files in their
traditional locations if "~/.emacs.d" or "~/.emacs" exist, even if
"$XDG_CONFIG_HOME/emacs" also exists.  This means that you must delete
or rename any existing "~/.emacs.d" and "~/.emacs" to enable use of
the XDG directory.
Eli Zaretskii's avatar
Eli Zaretskii committed
175

Glenn Morris's avatar
Glenn Morris committed
176 177 178
If "~/.emacs.d" does not exist, and Emacs has decided to use it
(i.e. "$XDG_CONFIG_HOME/emacs" does not exist), Emacs will create it.
Emacs will never create "$XDG_CONFIG_HOME/emacs".
Glenn Morris's avatar
Glenn Morris committed
179

Glenn Morris's avatar
Glenn Morris committed
180 181
Whichever directory Emacs decides to use, it will set
'user-emacs-directory' to point to it.
Eli Zaretskii's avatar
Eli Zaretskii committed
182 183 184

+++
** Emacs can now be configured using an early init file.
Glenn Morris's avatar
Glenn Morris committed
185
The file is called "early-init.el", in 'user-emacs-directory'.  It is
Eli Zaretskii's avatar
Eli Zaretskii committed
186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225
loaded very early in the startup process: before graphical elements
such as the tool bar are initialized, and before the package manager
is initialized.  The primary purpose is to allow customizing how the
package system is initialized given that initialization now happens
before loading the regular init file (see below).

We recommend against putting any customizations in this file that
don't need to be set up before initializing installed add-on packages,
because the early init file is read too early into the startup
process, and some important parts of the Emacs session, such as
'window-system' and other GUI features, are not yet set up, which could
make some customization fail to work.

+++
** Installed packages are now activated *before* loading the init file.
As a result of this change, it is no longer necessary to call
'package-initialize' in your init file.

Previously, a call to 'package-initialize' was automatically inserted
into the init file when Emacs was started.  This call can now safely
be removed.  Alternatively, if you want to ensure that your init file
is still compatible with earlier versions of Emacs, change it to:

(when (< emacs-major-version 27)
  (package-initialize))

However, if your init file changes the values of 'package-load-list'
or 'package-user-dir', or sets 'package-enable-at-startup' to nil then
it won't work right without some adjustment:
- You can move that code to the early init file (see above), so those
  settings apply before Emacs tries to activate the packages.
- You can use the new 'package-quickstart' so activation of packages
  does not need to pay attention to 'package-load-list' or
  'package-user-dir' any more.

---
** Emacs now notifies systemd when startup finishes or shutdown begins.
Units that are ordered after 'emacs.service' will only be started
after Emacs has finished initialization and is ready for use.
(If your Emacs is installed in a non-standard location and you copied the
Glenn Morris's avatar
Glenn Morris committed
226
emacs.service file to e.g. "~/.config/systemd/user/", you will need to copy
Eli Zaretskii's avatar
Eli Zaretskii committed
227 228 229 230 231
the new version of the file again.)


* Changes in Emacs 27.1

Glenn Morris's avatar
Glenn Morris committed
232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
+++
** Emacs now supports resizing and rotating images without ImageMagick.
All modern systems support this feature.  (On GNU and Unix systems,
Cairo drawing or the XRender extension to X11 is required for this to
be available; the configure script will test for it and, if found,
enable scaling.)

The new function 'image-transforms-p' can be used to test whether any
given frame supports these capabilities.

+++
** The Network Security Manager now allows more fine-grained control
of what checks to run via the 'network-security-protocol-checks'
user option.

+++
** TLS connections have their security tightened by default.
Most of the checks for outdated, believed-to-be-weak TLS algorithms
and ciphers are now switched on by default.  (In addition, several new
TLS weaknesses are now warned about.)  By default, the NSM will
flag connections using these weak algorithms and ask users whether to
allow them.  To get the old behavior back (where certificates are
checked for validity, but no warnings about weak cryptography are
issued), you can either set 'network-security-protocol-checks' to nil,
or adjust the elements in that user option to only happen on the 'high'
security level (assuming you use the 'medium' level).

---
** New user option 'nsm-trust-local-network'.
Allows skipping Network Security Manager checks for hosts on your
local subnet(s).  It defaults to nil.  Usually, there should be no
need to set this non-nil, and doing that risks opening your local
network connections to attacks.  So be sure you know what you are
doing before changing the value.

+++
** Native GnuTLS connections can now use client certificates.
Previously, this support was only available when using the external
'gnutls-cli' command.  Call 'open-network-stream' with
':client-certificate t' to trigger looking up of per-server
certificates via 'auth-source'.

+++
** New user option 'network-stream-use-client-certificates'.
When non-nil, 'open-network-stream' performs lookups of client
certificates using 'auth-source' as if ':client-certificate t' were
specified if there is no explicit ':client-certificate' parameter.
Defaults to nil.

Eli Zaretskii's avatar
Eli Zaretskii committed
281 282 283 284 285 286 287 288 289 290 291 292
+++
** 'next/previous-multiframe-window' have been renamed.
The new names are as follows:

 'next-multiframe-window'     -> 'next-window-any-frame'
 'previous-multiframe-window' -> 'previous-window-any-frame'

The old function names are maintained as aliases for backward
compatibility.

** emacsclient
+++
Glenn Morris's avatar
Glenn Morris committed
293
*** emacsclient now supports the 'EMACS_SOCKET_NAME' environment variable.
Eli Zaretskii's avatar
Eli Zaretskii committed
294 295 296 297
The command-line argument '--socket-name' overrides it.
(The same behavior as for the pre-existing 'EMACS_SERVER_FILE' variable.)

+++
Glenn Morris's avatar
Glenn Morris committed
298 299 300
*** Emacs and emacsclient now default to "$XDG_RUNTIME_DIR/emacs".
This is used as the directory for client/server sockets, if Emacs is
running on a platform or environment that sets the 'XDG_RUNTIME_DIR'
Eli Zaretskii's avatar
Eli Zaretskii committed
301 302 303 304 305 306 307 308
environment variable to indicate where session sockets should go.
To get the old, less-secure behavior, you can set the
'EMACS_SOCKET_NAME' environment variable to an appropriate value.

---
*** When run by root, emacsclient no longer connects to non-root sockets.
(Instead you can use Tramp methods to run root commands in a non-root Emacs.)

Glenn Morris's avatar
Glenn Morris committed
309 310 311 312 313 314 315 316
---
** 'xft-ignore-color-fonts' now ignores even more color fonts.
There are color fonts that managed to bypass the existing checks,
causing XFT crashes, they are now filtered out.  Setting
'xft-ignore-color-fonts' to nil removes those checks, which might
require setting 'face-ignored-fonts' to filter out problematic fonts.
Known problematic fonts are "Noto Color Emoji" and "Emoji One".

Glenn Morris's avatar
Glenn Morris committed
317 318 319 320 321 322 323 324 325
---
** The GTK+ font chooser now respects 'face-ignored-fonts'.
When using 'menu-set-font' under GTK3, the available fonts are now
matched against 'face-ignored-fonts'.

---
** The GTK+ font chooser now remembers the previously selected settings.
It now remembers the name, size, style, etc.

Eli Zaretskii's avatar
Eli Zaretskii committed
326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350
+++
** New user option 'what-cursor-show-names'.
When non-nil, 'what-cursor-position' will show the name of the character
in addition to the decimal/hex/octal representation.  Default nil.

+++
** New function 'network-lookup-address-info'.
This does IPv4 and/or IPv6 address lookups on hostnames.

+++
** 'network-interface-list' can now return IPv4 and IPv6 addresses.
IPv4 and IPv6 addresses are now returned by default if available,
optionally including netmask/broadcast address information.

---
** Control of the threshold for using the 'distant-foreground' color.
The threshold for color distance below which the 'distant-foreground'
color of the face will be used instead of the foreground color can now
be controlled via the new variable 'face-near-same-color-threshold'.
The default value is 30000, as the previously hard-coded threshold.

+++
** The function 'read-passwd' uses "*" as default character to hide passwords.

** The function 'read-answer' now accepts not only single character
Glenn Morris's avatar
Glenn Morris committed
351 352
answers, but also function keys like 'F1', character events such as
'C-M-h', and control characters like 'C-h'.
Eli Zaretskii's avatar
Eli Zaretskii committed
353 354

** Lexical binding is now used when evaluating interactive Elisp forms.
Glenn Morris's avatar
Glenn Morris committed
355 356 357
More specifically, 'lexical-binding' is now used for 'M-:', '--eval',
as well as in 'lisp-interaction-mode' and 'ielm-mode', used in the
"*scratch*" and "*ielm*" buffers.
Eli Zaretskii's avatar
Eli Zaretskii committed
358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438

---
** The new user option 'tooltip-resize-echo-area' avoids truncating
tooltip text on GUI frames when tooltips are displayed in the echo
area.  Instead, it resizes the echo area as needed to accommodate the
full tool-tip text.

---
** Show mode line tooltips only if the corresponding action applies.
Customize the user option 'mode-line-default-help-echo' to restore the
old behavior where the tooltip text is also shown when the
corresponding action does not apply.

+++
** New hook 'server-after-make-frame-hook'.
This hook is a convenient place to perform initializations in daemon
mode which require GUI features to be available.  One example is
restoration of the previous session using the desktop.el package: put
the call to 'desktop-read' in this hook, if you want the GUI settings
to be restored, or if desktop.el needs to interact with you during
restoration of the session.

+++
** The functions 'set-frame-height' and 'set-frame-width' are now
commands, and will set the currently selected frame to the height/
width specified by the numeric prefix.

+++
** New function 'logcount' calculates an integer's Hamming weight.

+++
** New function 'libxml-available-p'.
This function returns non-nil if libxml support is both compiled in
and available at run time.  Lisp programs should use this function to
detect built-in libxml support, instead of testing for that
indirectly, e.g., by checking that functions like
'libxml-parse-html-region' return nil.

+++
** 'libxml-parse-xml-region' and 'libxml-parse-html-region' take
a parameter that's called DISCARD-COMMENTS, but it really only
discards the top-level comment.  Therefore this parameter is now
obsolete, and the new utility function 'xml-remove-comments' can be
used to remove comments before calling the libxml functions to parse
the data.

+++
** A new DOM (the XML/HTML document structure returned by functions
such as 'libxml-parse-html-region') traversal function has been added:
'dom-search', which takes a DOM and a predicate and returns all nodes
that match.

+++
** New function 'fill-polish-nobreak-p', to be used in 'fill-nobreak-predicate'.
It blocks line breaking after a one-letter word, also in the case when
this word is preceded by a non-space, but non-alphanumeric character.

+++
** The limit on repetitions in regexps has been raised to 2^16-1.
It was previously limited to 2^15-1.  For example, the following
regular expression was previously invalid, but is now accepted:

   x\{32768\}

---
** The German prefix and postfix input methods now support Capital sharp S.

---
** New input methods 'hawaiian-postfix' and 'hawaiian-prefix'.

---
** New input methods 'georgian-qwerty' and 'georgian-nuskhuri'.

---
** New input methods for several variants of the Sami language.
The Sami input methods include: 'norwegian-sami-prefix',
'bergsland-hasselbrink-sami-prefix', 'southern-sami-prefix',
'ume-sami-prefix', 'northern-sami-prefix', 'inari-sami-prefix',
'skolt-sami-prefix', and 'kildin-sami-prefix'.

+++
Glenn Morris's avatar
Glenn Morris committed
439 440
** Japanese environments use UTF-8 by default.
In Japanese environments that do not specify encodings and are not
Eli Zaretskii's avatar
Eli Zaretskii committed
441 442 443 444 445 446 447 448 449 450 451
based on MS-Windows, the default encoding is now utf-8 instead of
japanese-iso-8bit.

+++
** New function 'exec-path'.
This function by default returns the value of the corresponding
user option, but can optionally return the equivalent of 'exec-path'
from a remote host.

+++
** The function 'executable-find' supports an optional argument REMOTE.
Glenn Morris's avatar
Glenn Morris committed
452
This triggers searching for the program on the remote host as indicated by
Eli Zaretskii's avatar
Eli Zaretskii committed
453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476
'default-directory'.

+++
** New user option 'auto-save-no-message'.
When set to t, no message will be shown when auto-saving (default
value: nil).

---
** The value of 'make-cursor-line-fully-visible' can now be a function.
In addition to nil or non-nil, the value can now be a predicate
function.  Follow mode uses this to control scrolling of its windows
when the last screen line in a window is not fully visible.

+++
** New variable 'emacs-repository-branch'.
It reports the git branch from which Emacs was built.

+++
** New user option 'switch-to-buffer-obey-display-actions'.
When non-nil, 'switch-to-buffer' uses 'pop-to-buffer-same-window' that
respects display actions specified by 'display-buffer-alist' and
'display-buffer-overriding-action'.

+++
Glenn Morris's avatar
Glenn Morris committed
477
** The user option 'switch-to-visible-buffer' is now obsolete.
Eli Zaretskii's avatar
Eli Zaretskii committed
478 479 480
Customize 'switch-to-prev-buffer-skip' instead.

+++
Glenn Morris's avatar
Glenn Morris committed
481
** New user option 'switch-to-prev-buffer-skip'.
Glenn Morris's avatar
Glenn Morris committed
482
This user option allows specifying the set of buffers that may be
Glenn Morris's avatar
Glenn Morris committed
483 484
shown by 'switch-to-prev-buffer' and 'switch-to-next-buffer' more
stringently than the now obsolete 'switch-to-visible-buffer'.
Eli Zaretskii's avatar
Eli Zaretskii committed
485

Glenn Morris's avatar
Glenn Morris committed
486
** New 'flex' completion style.
Eli Zaretskii's avatar
Eli Zaretskii committed
487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531
An implementation of popular "flex/fuzzy/scatter" completion which
matches strings where the pattern appears as a subsequence.  Put
simply, makes "foo" complete to both "barfoo" and "frodo".  Add 'flex'
to 'completion-styles' or 'completion-category-overrides' to use it.

** The 'completion-common-part' face is now visible by default.

+++
** New face attribute ':extend' to control face extension at EOL.
The new face attribute ':extend' controls whether to use the face for
displaying the empty space beyond end of line (EOL) till the edge of
the window.  By default, this attribute is non-nil only for a small
number of faces, notably, 'region'; any other face that crosses end of
line will not affect the display of the empty space at EOL.  This is
to make Emacs behave more like other GUI applications with respect to
displaying faces that cross line boundaries.

This attribute behaves specially when theme definitions are applied:
if the theme doesn't specify an explicit value of this attribute for a
face, the value from the original face definition is inherited.
Consequently, a theme generally shouldn't specify this attribute
unless it has a good reason to do so.

** Connection-local variables
+++
*** Connection-local variables are applied by default like file-local
and directory-local variables.

+++
*** The macro 'with-connection-local-variables' has been renamed from
'with-connection-local-profiles'.  No argument PROFILES needed any longer.

---
** New user option 'next-error-verbose' controls when 'next-error'
outputs a message about the error locus.

---
** New user option 'grep-search-path' defines the directories searched for
grep hits (this used to be controlled by 'compilation-search-path').

---
** New user option 'emacs-lisp-compilation-search-path' defines the
directories searched for byte-compiler error messages (this used to
be controlled by 'compilation-search-path').

Glenn Morris's avatar
Glenn Morris committed
532
---
Eli Zaretskii's avatar
Eli Zaretskii committed
533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548
** Multicolor fonts such as "Noto Color Emoji" can be displayed on
Emacs configured with Cairo drawing and linked with cairo >= 1.16.0.

+++
** Emacs now optionally displays a fill column indicator.
This is similar to what 'fill-column-indicator' package provides, but
much faster and compatible with 'show-trailing-whitespace'.

Customize the buffer-local user options 'display-fill-column-indicator'
and 'display-fill-column-indicator-character' to activate the
indicator.

The indicator is not displayed at all in minibuffer windows and
in tooltips, as it is not useful there.

There are 2 new buffer local variables and 1 face to customize this
Glenn Morris's avatar
Glenn Morris committed
549
mode, they are described in the manual "(emacs) Display".
Eli Zaretskii's avatar
Eli Zaretskii committed
550 551

+++
Glenn Morris's avatar
Glenn Morris committed
552
** 'progress-reporter-update' now accepts an optional suffix string to display.
Eli Zaretskii's avatar
Eli Zaretskii committed
553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569

---
** New user option 'xref-file-name-display' controls the display of
file names in xref buffers.

** New user option 'byte-count-to-string-function'.
It is used for displaying file sizes and disk space in some cases.

+++
** Emacs now interprets RGB triplets like HTML, SVG, and CSS do.
The X convention previously used differed slightly, particularly for
RGB triplets with a single hexadecimal digit per component.

---
** The toolbar now shows the equivalent key binding in its tooltips.

---
Glenn Morris's avatar
Glenn Morris committed
570 571
** The File menu-bar menu was re-arranged.
Print menu items moved to submenu, and also added the new entries for tabs.
Eli Zaretskii's avatar
Eli Zaretskii committed
572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590

---
** 'scroll-lock-mode' is now bound to the 'Scroll_Lock' key globally.
Note that this key binding will not work on MS-Windows systems if
'w32-scroll-lock-modifier' is non-nil.

---
** 'global-set-key', called interactively, now no longer downcases a
key binding with an upper case letter - if you can type it, you can
bind it.

+++
** 'read-from-minibuffer' now works with buffer-local history variables.
The HIST argument of 'read-from-minibuffer' now works correctly with
buffer-local variables.  This means that different buffers can have
their own separated input history list if desired.

** 'backup-by-copying-when-privileged-mismatch' applies to file gid, too.
In addition to checking the file owner uid, Emacs also checks that the
Glenn Morris's avatar
Glenn Morris committed
591 592
group gid is not greater than 'backup-by-copying-when-privileged-mismatch';
if so, 'backup-by-copying-when-mismatch' will be forced on.
Eli Zaretskii's avatar
Eli Zaretskii committed
593 594 595 596


* Editing Changes in Emacs 27.1

Glenn Morris's avatar
Glenn Morris committed
597
+++
Glenn Morris's avatar
Glenn Morris committed
598
** When asked to visit a large file, Emacs now offers to visit it literally.
Glenn Morris's avatar
Glenn Morris committed
599 600 601 602 603
Previously, Emacs would only ask for confirmation before visiting
large files.  Now it also offers a third alternative: to visit the
file literally, as in 'find-file-literally', which speeds up
navigation and editing of large files.

Eli Zaretskii's avatar
Eli Zaretskii committed
604
+++
Glenn Morris's avatar
Glenn Morris committed
605
** 'zap-to-char' now uses the history of characters you used to zap to.
Eli Zaretskii's avatar
Eli Zaretskii committed
606 607 608 609 610 611 612 613 614
'zap-to-char' uses the new 'read-char-from-minibuffer' function to allow
navigating through the history of characters that have been input.
This is mostly useful for characters that have complex input methods
where inputting the character again may involve many keystrokes.

+++
** 'save-some-buffers' now has a new action in the prompt: 'C-f' will
exit the command and switch to the buffer currently being asked about.

Glenn Morris's avatar
Glenn Morris committed
615 616 617 618 619 620
---
** More commands support noncontiguous rectangular regions, namely
'upcase-dwim', 'downcase-dwim', 'capitalize-dwim', 'capitalize-region',
'upcase-initials-region', 'replace-string', 'replace-regexp', and
'delimit-columns-region'.

Eli Zaretskii's avatar
Eli Zaretskii committed
621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697
+++
** The new 'amalgamating-undo-limit' variable can be used to control
how many changes should be amalgamated when using the 'undo' command.

---
** The 'newline-and-indent' command (commonly bound to 'RET' in many
modes) now takes an optional numeric argument to specify how many
times is should insert newlines (and indent).

+++
** New command 'make-empty-file'.

---
** New variable 'x-wait-for-event-timeout'.
This controls how long Emacs will wait for updates to the graphical
state to take effect (making a frame visible, for example).

+++
** New user option 'electric-quote-replace-double'.
This option controls whether '"' is replaced in 'electric-quote-mode',
in addition to other quote characters.  If non-nil, ASCII double-quote
characters that quote text "like this" are replaced by double
typographic quotes, “like this”, in text modes, and in comments in
non-text modes.

---
** New user option 'flyspell-case-fold-duplications'.
This option controls whether Flyspell mode considers consecutive words
to be duplicates if they are not in the same case.  If non-nil, the
default, words are considered to be duplicates even if their letters'
case does not match.

---
** 'write-abbrev-file' now includes special properties.
'write-abbrev-file' now writes special properties like ':case-fixed'
for abbrevs that have them.

+++
** 'write-abbrev-file' skips empty tables.
'write-abbrev-file' now skips inserting a 'define-abbrev-table' form for
tables which do not have any non-system abbrevs to save.

+++
** The new functions and commands 'text-property-search-forward' and
'text-property-search-backward' have been added.  These provide an
interface that's more like functions like 'search-forward'.

---
** 'add-dir-local-variable' now uses dotted pair notation syntax to
write alists of variables to ".dir-locals.el".  This is the same
syntax that you can see in the example of a ".dir-locals.el" file in
the node "(emacs) Directory Variables" of the user manual.

+++
** Network connections using 'local' can now use IPv6.
'make-network-process' now uses the correct loopback address when
asked to use ':host 'local' and ':family 'ipv6'.

+++
** The new function 'replace-region-contents' replaces the current
region using a given replacement-function in a non-destructive manner
(in terms of 'replace-buffer-contents').

+++
** The command 'replace-buffer-contents' now has two optional
arguments mitigating performance issues when operating on huge
buffers.

+++
** Dragging 'C-M-mouse-1' now marks rectangular regions.

+++
** The command 'delete-indentation' now operates on the active region.
If the region is active, the command joins all the lines in the
region.  When there's no active region, the command works on the
current and the previous or the next line, as before.

Glenn Morris's avatar
Glenn Morris committed
698 699 700 701 702
+++
** You can now change the font size with the mouse wheel.
Scroling the mouse wheel with the Ctrl key pressed will now act the
same as the 'C-x C-+' and 'C-x C--' commands.

Eli Zaretskii's avatar
Eli Zaretskii committed
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720

* Changes in Specialized Modes and Packages in Emacs 27.1

---
** New HTML mode skeleton 'html-id-anchor'.
This new command (which inserts an <a id="foo">_</a> skeleton) is
bound to 'C-c C-c #'.

+++
** New command 'font-lock-refontify'.
This is an interactive convenience function to be used when developing
font locking for a mode.  It recomputes the font locking data and then
re-fontifies the buffer.

---
** Font Lock is smarter about fontifying unterminated strings and comments.
When you type a quote that starts a string, or a comment delimiter
that starts a comment, font-lock will not immediately refontify the
Glenn Morris's avatar
Glenn Morris committed
721 722
following characters in 'font-lock-string-face' or
'font-lock-comment-face'.  Instead, it will delay the fontification
Eli Zaretskii's avatar
Eli Zaretskii committed
723
beyond the current line to give you a chance to close the string or
Glenn Morris's avatar
Glenn Morris committed
724
comment.  This is controlled by the new user option
Eli Zaretskii's avatar
Eli Zaretskii committed
725 726 727 728 729 730 731 732 733 734
'jit-lock-antiblink-grace', which specifies the delay in seconds.  The
default is 2 seconds; set to nil to get back the old behavior.

---
** The 'C' command in 'tar-mode' will now preserve the timestamp of
the extracted file if the new user option 'tar-copy-preserve-time' is
non-nil.

---
** 'autoconf-mode' is now used instead of 'm4-mode' for the
Glenn Morris's avatar
Glenn Morris committed
735
"acinclude.m4" / "aclocal.m4" / "acsite.m4" files.
Eli Zaretskii's avatar
Eli Zaretskii committed
736 737 738 739 740 741 742 743 744 745 746 747 748

---
** On GNU/Linux, 'M-x battery' will now list all batteries, no matter
what they're named, and the 'battery-linux-sysfs-regexp' variable has
been removed.

** The 'list-processes' command now includes port numbers in the
network connection information (in addition to the host name).

** The 'cl' package is now officially deprecated in favor of 'cl-lib'.

---
** desktop
Glenn Morris's avatar
Glenn Morris committed
749

Eli Zaretskii's avatar
Eli Zaretskii committed
750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765
*** When called interactively with a prefix arg 'C-u', 'desktop-read'
now prompts the user for the directory containing the desktop file.

+++
** display-line-numbers-mode

*** New faces 'line-number-major-tick' and 'line-number-minor-tick',
and user options 'display-line-numbers-major-tick' and
'display-line-numbers-minor-tick' can be used to highlight the line
numbers of lines multiple of certain numbers.

*** New variable 'display-line-numbers-offset', when non-zero, adds
an offset to absolute line numbers.

+++
** winner
Glenn Morris's avatar
Glenn Morris committed
766

Eli Zaretskii's avatar
Eli Zaretskii committed
767 768 769
*** A new user option, 'winner-boring-buffers-regexp', has been added.

** table
Glenn Morris's avatar
Glenn Morris committed
770 771

*** 'table-generate-source' and friends now support outputting wiki and
Eli Zaretskii's avatar
Eli Zaretskii committed
772 773 774 775
mediawiki format tables.

---
** telnet-mode
Glenn Morris's avatar
Glenn Morris committed
776

Eli Zaretskii's avatar
Eli Zaretskii committed
777 778 779
*** Reverting a buffer in 'telnet-mode' will restart a closed connection.

** goto-addr
Glenn Morris's avatar
Glenn Morris committed
780

Glenn Morris's avatar
Glenn Morris committed
781 782 783
*** A way to more conveniently specify what URI address schemes should
be ignored has been added via the 'goto-address-uri-schemes-ignored'
variable.
Eli Zaretskii's avatar
Eli Zaretskii committed
784 785 786

+++
** tex-mode
Glenn Morris's avatar
Glenn Morris committed
787

Eli Zaretskii's avatar
Eli Zaretskii committed
788 789 790 791 792
*** 'latex-noindent-commands' controls indentation of certain commands.
You can use this new user option to control indentation of arguments of
\emph, \footnote, and similar commands.

** byte compiler
Glenn Morris's avatar
Glenn Morris committed
793

Eli Zaretskii's avatar
Eli Zaretskii committed
794 795 796 797 798 799
*** 'byte-compile-dynamic' is now obsolete.
This is because on the one hand it suffers from misbehavior in corner
cases that have plagued it for years, and on the other experiments indicated
that it doesn't bring any measurable benefit.

---
Glenn Morris's avatar
Glenn Morris committed
800 801
*** The 'g' keystroke in "*Compile-Log*" buffers has been bound to a
new command that will recompile the file previously compiled with 'M-x
Eli Zaretskii's avatar
Eli Zaretskii committed
802 803 804
byte-compile-file' and the like.

** compile.el
Glenn Morris's avatar
Glenn Morris committed
805

Eli Zaretskii's avatar
Eli Zaretskii committed
806 807 808
---
*** In 'compilation-error-regexp-alist', 'line' (and 'end-line') can
be functions.
Glenn Morris's avatar
Glenn Morris committed
809

Eli Zaretskii's avatar
Eli Zaretskii committed
810 811 812 813 814
+++
*** 'compilation-context-lines' can now take the value t; this is like
nil, but instead of scrolling the current line to the top of the
screen when there is no left fringe, it inserts a visible arrow before
column zero.
Glenn Morris's avatar
Glenn Morris committed
815

Eli Zaretskii's avatar
Eli Zaretskii committed
816 817 818 819 820 821
---
*** The new 'compilation-transform-file-match-alist' user option can
be used to transform file name matches compilation output, and remove
known false positives being recognized as warnings/errors.

** cl-lib.el
Glenn Morris's avatar
Glenn Morris committed
822

Eli Zaretskii's avatar
Eli Zaretskii committed
823 824 825 826 827 828 829 830 831 832 833
+++
*** 'cl-defstruct' has a new ':noinline' argument to prevent inlining
its functions.

+++
*** 'cl-defstruct' slots accept a ':documentation' property.

---
*** 'cl-values-list' will now signal an error if its argument isn't a list.

** doc-view.el
Glenn Morris's avatar
Glenn Morris committed
834

Eli Zaretskii's avatar
Eli Zaretskii committed
835
*** New commands 'doc-view-presentation' and 'doc-view-fit-window-to-page'.
Glenn Morris's avatar
Glenn Morris committed
836 837

*** Added support for password-protected PDF files.
Eli Zaretskii's avatar
Eli Zaretskii committed
838 839 840 841 842

*** A new user option 'doc-view-pdftotext-program-args' has been added
to allow controlling how the conversion to text is done.

** Ido
Glenn Morris's avatar
Glenn Morris committed
843

Eli Zaretskii's avatar
Eli Zaretskii committed
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
*** New user option 'ido-big-directories' to mark directories whose
names match certain regular expressions as big.  Ido won't attempt to
list the contents of such directories when completing file names.

** Minibuffer

+++
*** A new user option, 'minibuffer-beginning-of-buffer-movement', has
been introduced to allow controlling how the 'M-<' command works in
the minibuffer.  If non-nil, point will move to the end of the prompt
(if point is after the end of the prompt).

+++
*** When the minibuffer is active, echo-area messages are displayed at
the end of the minibuffer instead of hiding the minibuffer by the echo
Glenn Morris's avatar
Glenn Morris committed
859
area display.  The new user option 'minibuffer-message-clear-timeout'
Eli Zaretskii's avatar
Eli Zaretskii committed
860 861 862 863 864 865 866 867 868 869
controls how messages displayed in this situation are removed from the
minibuffer.

---
*** Minibuffer now uses 'minibuffer-message' to display error messages
at the end of the active minibuffer.

+++
*** 'y-or-n-p' now uses the minibuffer to read 'y' or 'n' answer.

Glenn Morris's avatar
Glenn Morris committed
870
---
Glenn Morris's avatar
Glenn Morris committed
871 872
*** Some commands that previously used 'read-char-choice' now read
a character using the minibuffer by 'read-char-from-minibuffer'.
Eli Zaretskii's avatar
Eli Zaretskii committed
873 874

** map.el
Glenn Morris's avatar
Glenn Morris committed
875

Eli Zaretskii's avatar
Eli Zaretskii committed
876 877 878 879 880 881 882
*** Now also understands plists.
*** Now defined via generic functions that can be extended via 'cl-defmethod'.
*** Deprecate the 'map-put' macro in favor of a new 'map-put!' function.
*** 'map-contains-key' now returns a boolean rather than the key.
*** Deprecate the 'testfn' args of 'map-elt' and 'map-contains-key'.
*** New generic function 'map-insert'.
+++
Glenn Morris's avatar
Glenn Morris committed
883
*** The 'type' arg can be a list '(hash-table :key1 VAL1 :key2 VAL2 ...)'.
Eli Zaretskii's avatar
Eli Zaretskii committed
884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902

** seq.el
New convenience functions 'seq-first' and 'seq-rest' give easy access
to respectively the first and all but the first elements of sequences.

The new predicate function 'seq-contains-p' should be used instead of
the now obsolete 'seq-contains'.

---
** Follow mode
In the current follow group of windows, "ghost" cursors are no longer
displayed in the non-selected follow windows.  To get the old behavior
back, customize 'follow-hide-ghost-cursors' to nil.

+++
** New variable 'warning-fill-column' for 'display-warning'.

** Windmove

Glenn Morris's avatar
Glenn Morris committed
903 904 905
---
*** 'windmove-create-window' when non-nil makes a new window.
This happens upon moving off the edge of the frame.
Eli Zaretskii's avatar
Eli Zaretskii committed
906

Glenn Morris's avatar
Glenn Morris committed
907
---
Eli Zaretskii's avatar
Eli Zaretskii committed
908 909 910 911 912 913 914 915 916 917 918 919 920
*** Windmove supports directional window display and selection.
The new command 'windmove-display-default-keybindings' binds default
keys with provided modifiers (by default, Shift-Meta) to the commands
that display the next buffer in the window at the specified direction.
This is like 'windmove-default-keybindings' that binds keys to commands
that select the window in the specified direction, but additionally it
displays the buffer from the next command in that window.  For example,
'S-M-right C-h i' displays the "*Info*" buffer in the right window,
creating the window if necessary.  A special key can be customized to
display the buffer in the same window, for example, 'S-M-0 C-h e'
displays the "*Messages*" buffer in the same window.  'S-M-t C-h C-n'
displays NEWS in a new tab.

Glenn Morris's avatar
Glenn Morris committed
921
---
Eli Zaretskii's avatar
Eli Zaretskii committed
922 923 924 925 926 927 928 929 930
*** Windmove also supports directional window deletion.
The new command 'windmove-delete-default-keybindings' binds default
keys with provided prefix (by default, 'C-x') and modifiers (by default,
'Shift') to the commands that delete the window in the specified
direction.  For example, 'C-x S-down' deletes the window below.
With a prefix arg 'C-u', also kills the buffer in that window.
With 'M-0', deletes the selected window and selects the window
that was in the specified direction.

Glenn Morris's avatar
Glenn Morris committed
931
---
Eli Zaretskii's avatar
Eli Zaretskii committed
932 933 934 935
*** New command 'windmove-swap-states-in-direction' binds default keys
to the commands that swap the states of the selected window with the
window in the specified direction.

Glenn Morris's avatar
Glenn Morris committed
936 937 938 939
---
*** Windmove code no longer used is now obsolete.
That includes the user option 'windmove-window-distance-delta' and the
functions 'windmove-coord-add', 'windmove-constrain-to-range',
Eli Zaretskii's avatar
Eli Zaretskii committed
940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
'windmove-constrain-around-range', 'windmove-frame-edges',
'windmove-constrain-loc-for-movement', 'windmove-wrap-loc-for-movement',
'windmove-reference-loc' and 'windmove-other-window-loc'.

** Octave mode
The mode is automatically enabled in files that start with the
'function' keyword.

** project.el

*** New commands 'project-search' and 'project-query-replace-regexp'.
*** New user option 'project-read-file-name-function'.

** Etags

+++
*** 'next-file' is now an obsolete alias of 'tags-next-file'.

Glenn Morris's avatar
Glenn Morris committed
958
---
Eli Zaretskii's avatar
Eli Zaretskii committed
959 960 961
*** 'tags-loop-revert-buffers' is an obsolete alias of
'fileloop-revert-buffers'.

Glenn Morris's avatar
Glenn Morris committed
962
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987
*** The 'tags-loop-continue' function along with the
'tags-loop-operate' and 'tags-loop-scan' variables are now obsolete;
use the new 'fileloop-initialize' and 'fileloop-continue' functions
instead.

+++
*** etags is now able to read Zstandard-compressed files.

** bibtex

---
*** New commands 'bibtex-next-entry' and 'bibtex-previous-entry'.
In 'bibtex-mode-map', 'forward-paragraph' and 'backward-paragraph' are
remapped to these, respectively.

** Dired

---
*** On systems that support suid/guid files, Dired now fontifies the
permissions of such files with a special face 'dired-set-id'.

+++
*** New command 'dired-create-empty-file'.

+++
Glenn Morris's avatar
Glenn Morris committed
988 989
*** New command 'dired-number-of-marked-files'.
It is by default bound to '* N'.
Eli Zaretskii's avatar
Eli Zaretskii committed
990

Glenn Morris's avatar
Glenn Morris committed
991
---
Eli Zaretskii's avatar
Eli Zaretskii committed
992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
*** The marking commands now report how many files were marked by the
command itself, not how many files are marked in total.

---
*** A new face, 'dired-special', is used to highlight sockets, named
pipes, block devices and character devices.

+++
*** The new user option 'dired-create-destination-dirs' controls whether
'dired-do-copy' and 'dired-rename-file' should create non-existent
directories in the destination.

+++
*** 'dired-dwim-target' can be customized to prefer either the next window,
or one of the most recently visited windows with a Dired buffer.

Glenn Morris's avatar
Glenn Morris committed
1008
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
1009 1010 1011
*** When the new user option 'dired-vc-rename-file' is non-nil,
Dired performs file renaming using underlying version control system.

Glenn Morris's avatar
Glenn Morris committed
1012 1013 1014 1015
---
*** Zstandard compression is now supported for 'dired-do-compress' and
'dired-do-compress-to'.

Eli Zaretskii's avatar
Eli Zaretskii committed
1016 1017
** Find-Dired

Glenn Morris's avatar
Glenn Morris committed
1018
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1019 1020 1021 1022
*** New user option 'find-dired-refine-function'.
The default value is 'find-dired-sort-by-filename'.

---
Glenn Morris's avatar
Glenn Morris committed
1023
*** New sorting options for the user option 'find-ls-option'.
Eli Zaretskii's avatar
Eli Zaretskii committed
1024 1025 1026 1027 1028

** Change Logs and VC

---
*** New user option 'vc-tor'.
Glenn Morris's avatar
Glenn Morris committed
1029 1030 1031
When non-nil, this user option causes the VC commands to communicate
with the repository via Tor's proxy, using the 'torsocks' wrapper
script.  The default is nil.
Eli Zaretskii's avatar
Eli Zaretskii committed
1032 1033 1034 1035 1036

+++
*** New command 'log-edit-generate-changelog-from-diff', bound to 'C-c C-w'.
This generates ChangeLog entries from the VC fileset diff.

Glenn Morris's avatar
Glenn Morris committed
1037
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1038 1039 1040 1041 1042
*** 'vc-dir' now shows a button allowing you to hide the stash list.
Controlled by user option 'vc-git-show-stash'.  Default t means show
the entire list as before.  An integer value limits the list length
(but still allows you to show the entire list via the button).

Glenn Morris's avatar
Glenn Morris committed
1043
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
1044 1045 1046 1047 1048 1049 1050 1051 1052
*** Recording ChangeLog entries doesn't require an actual file.
If a ChangeLog file doesn't exist, and if the new user option
'add-log-dont-create-changelog-file' is non-nil (which is the
default), commands such as 'C-x 4 a' will add log entries to a
suitable named temporary buffer.  (An existing ChangeLog file will
still be used if it exists.)  Set the user option to nil to get the
previous behavior of always creating a buffer that visits a ChangeLog
file.

Glenn Morris's avatar
Glenn Morris committed
1053
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1054 1055 1056 1057 1058 1059
*** New user option 'vc-find-revision-no-save'.
With non-nil, 'vc-find-revision' doesn't write the created buffer to file.

---
*** 'vc-dir-ignore' now takes a prefix argument to ignore all marked files.

Glenn Morris's avatar
Glenn Morris committed
1060
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1061 1062 1063 1064
*** New user option 'vc-git-grep-template'.
This new user option allows customizing the default arguments passed to
'git-grep' when 'vc-git-grep' is used.

Glenn Morris's avatar
Glenn Morris committed
1065
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1066 1067 1068 1069
*** Command 'vc-git-stash' now respects marks in the "*vc-dir*" buffer.
When some files are marked, only those are stashed.
When no files are marked, all modified files are stashed, as before.

Glenn Morris's avatar
Glenn Morris committed
1070 1071
---
*** 'vc-git-stash' is now bound to 'C' in the stash headers.
Eli Zaretskii's avatar
Eli Zaretskii committed
1072

Glenn Morris's avatar
Glenn Morris committed
1073
--
Eli Zaretskii's avatar
Eli Zaretskii committed
1074 1075 1076 1077
*** Some stash keybindings are now available in the stash button.
'vc-git-stash' and 'vc-git-stash-snapshot' can now be run using 'C'
and 'S' respectively, including when there are no stashes.

Glenn Morris's avatar
Glenn Morris committed
1078
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
*** The new hook 'vc-retrieve-tag-hook' runs after retrieving a tag.

---
*** 'vc-hg' now invokes 'smerge-mode' when visiting files.
Code that attempted to invoke 'smerge-mode' when visiting an Hg file
with conflicts existed in earlier versions of Emacs, but incorrectly
never detected a conflict due to invalid assumptions about cached
values.

+++
*** The Hg (Mercurial) back-end now supports 'vc-region-history'.
The 'C-x v h' command now works in buffers that visit files controlled
by Hg.

+++
*** The Hg (Mercurial) back-end now prompts for revision to merge when
you invoke 'C-x v m' ('vc-merge').

---
Glenn Morris's avatar
Glenn Morris committed
1098
*** The Hg (Mercurial) back-end now uses tags, branches and bookmarks
Eli Zaretskii's avatar
Eli Zaretskii committed
1099 1100 1101 1102 1103 1104 1105
instead of revision numbers as completion candidates when it prompts
for a revision.

+++
*** 'C-u C-x v D' ('vc-root-version-diff') prompts for two revisions
and compares their entire trees.

Glenn Morris's avatar
Glenn Morris committed
1106 1107
*** New user option 'vc-hg-revert-switches'.
It specifies switches to pass to Hg's 'revert' command.
Eli Zaretskii's avatar
Eli Zaretskii committed
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118

*** 'C-x v M D' ('vc-diff-mergebase') and 'C-x v M L' ('vc-log-mergebase')
print diffs and logs between the merge base (common ancestor) of two
given revisions.

+++
*** The new 'd' command ('vc-dir-clean-files') in 'vc-dir-mode'
buffers will delete the marked files (or if no files are marked, the
file under point).  This command does not notify the VC backend, and
is mostly useful for unregistered files.

Glenn Morris's avatar
Glenn Morris committed
1119
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
*** New command 'vc-log-search' asks for a pattern, searches it
in the revision log, and displays matched log entries in the
log buffer.  For example, 'M-x vc-log-search RET bug#36644 RET'
displays all entries whose log messages match the bug number.
With a prefix argument asks for a command, so for example,
'C-u M-x vc-log-search RET git log -1 f302475 RET' will display
just one log entry found by its revision number.

+++
*** It is now possible to display a specific revision given by its ID.
If you invoke 'C-x v L' ('vc-print-root-log') with a numeric argument
of 1, as in 'C-1 C-x v L' or 'C-u 1 C-x v L', it asks for a revision
ID, and shows its log entry together with the diffs introduced by the
revision's commit.  (For some less capable VCSes, only the log entry
is shown.)

Glenn Morris's avatar
Glenn Morris committed
1136
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149
*** 'C-x v =' can now mimic Magit's diff format.
Set the new user option 'diff-font-lock-prettify' to t for that, see
below under "Diff mode".

---
*** The 'diff' function arguments OLD and NEW may each be a buffer
rather than a file, in non-interactive calls.  This change was made in
Emacs 24.1, but wasn't documented until now.

+++
*** New command 'diff-buffers' interactively diffs two buffers.

** Diff mode
Glenn Morris's avatar
Glenn Morris committed
1150

Eli Zaretskii's avatar
Eli Zaretskii committed
1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
+++
*** Hunks are now automatically refined by font-lock.
To disable refinement, set the new user option 'diff-refine' to nil.
To get back the old behavior where hunks are refined as you navigate
through a diff, set 'diff-refine' to the symbol 'navigate'.

+++
*** 'diff-auto-refine-mode' is deprecated in favor of 'diff-refine'.
It is no longer enabled by default and binding it no longer has any
effect.

+++
*** Better syntax highlighting of Diff hunks.
Fragments of source in Diff hunks are now by default highlighted
according to the appropriate major mode.  Customize the new user
option 'diff-font-lock-syntax' to nil to disable this.

Glenn Morris's avatar
Glenn Morris committed
1168
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189
*** File headers can be shortened, mimicking Magit's diff format.
To enable it, set the new user option 'diff-font-lock-prettify' to t.
On GUI frames, this option also displays the insertion and deletion
indicators on the left fringe.

+++
*** Prefix arg of 'diff-goto-source' means jump to the old revision
of the file under version control if point is on an old changed line,
or to the new revision of the file otherwise.

** Texinfo

+++
*** New function for inserting '@pxref', '@xref', or '@ref' commands.
The function 'texinfo-insert-dwim-@ref', bound to 'C-c C-c r' by
default, inserts one of three types of references based on the text
surrounding point, namely '@pxref' near a parenthesis, '@xref' at the
start of a sentence or at '(point-min)', else '@ref'.

** Browse-url

Glenn Morris's avatar
Glenn Morris committed
1190
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1191 1192 1193 1194
*** The function 'browse-url-emacs' can now visit a URL in selected window.
It now treats the optional 2nd argument to mean that the URL should be
shown in the currently selected window.

Glenn Morris's avatar
Glenn Morris committed
1195
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1196 1197 1198 1199 1200
*** A new function, 'browse-url-add-buttons' can be used to add clickable
links to most ordinary special-mode buffers that display text that
have URLs embedded.  'browse-url-button-regexp' controls what's
considered a button.

Glenn Morris's avatar
Glenn Morris committed
1201 1202 1203
---
*** New user option 'browse-url-secondary-browser-function'.
It can be set to a function that invokes an alternative browser.
Eli Zaretskii's avatar
Eli Zaretskii committed
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231

** Comint

+++
*** 'send-invisible' is now an obsolete alias for 'comint-send-invisible'.
Also, 'shell-strip-ctrl-m' is declared obsolete.

+++
*** 'C-c .' ('comint-insert-previous-argument') no longer interprets '&'.
This feature caused problems when '&&' was present in the previous
command.  Since this command emulates 'M-.' in Bash and zsh, neither
of which treats '&' specially, the feature was removed for
compatibility with these shells.

+++
*** 'comint-insert-previous-argument' can now count arguments from the end.
By default, invoking 'C-c .' with a numeric argument N would copy the
Nth argument, counting from the first one.  But if the new user option
'comint-insert-previous-argument-from-end' is non-nil, it will copy
the Nth argument counting from the last one.  Thus 'C-c .' can now
better emulate 'M-.' in both Bash and zsh, since the former counts
from the beginning of the arguments, while the latter counts from the
end.

+++
*** 'comint-run' can now accept a list of switches to pass to the program.
'C-u M-x comint-run' will prompt for the switches interactively.

Glenn Morris's avatar
Glenn Morris committed
1232
+++
Glenn Morris's avatar
Glenn Morris committed
1233
*** Abnormal hook 'comint-password-function' has been added.
Eli Zaretskii's avatar
Eli Zaretskii committed
1234 1235
This hook permits a derived mode to supply a password for the
underlying command interpreter without prompting the user.  For
Glenn Morris's avatar
Glenn Morris committed
1236
example, in 'sql-mode', the password for connecting to the database may
Eli Zaretskii's avatar
Eli Zaretskii committed
1237 1238 1239 1240 1241
be stored in the connection wallet and may be passed on the command
line to start the SQL interpreter.  This is a potential security flaw
that could expose user's database passwords on the command line
through the use of a process list (Bug#8427).  With this hook, it is
possible to not pass the password on the command line and wait for the
Glenn Morris's avatar
Glenn Morris committed
1242
program to prompt for the password.  When it does so, the password can
Eli Zaretskii's avatar
Eli Zaretskii committed
1243 1244 1245 1246 1247
be supplied to the SQL interpreter without involving the user just as
if it had been supplied on the command line.

** SQL

Glenn Morris's avatar
Glenn Morris committed
1248
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1249 1250 1251 1252
*** SQL Indent Minor Mode
SQL Mode now supports the ELPA 'sql-indent' package for assisting
sophisticated SQL indenting rules.  Note, however, that SQL is not
like other programming languages like C, Java, or Python where code is
Glenn Morris's avatar
Glenn Morris committed
1253
sparse and rules for formatting are fairly well established.  Instead
Eli Zaretskii's avatar
Eli Zaretskii committed
1254 1255 1256 1257 1258 1259 1260
SQL is more like COBOL (from which it came) and code tends to be very
dense and line ending decisions driven by syntax and line length
considerations to make readable code.  Experienced SQL developers may
prefer to rely upon existing Emacs facilities for formatting code but
the 'sql-indent' package provides facilities to aid more casual SQL
developers layout queries and complex expressions.

Glenn Morris's avatar
Glenn Morris committed
1261
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1262 1263 1264 1265
**** 'sql-use-indent-support' (default t) enables SQL indention support.
The 'sql-indent' package from ELPA must be installed to get the
indentation support in 'sql-mode' and 'sql-interactive-mode'.

Glenn Morris's avatar
Glenn Morris committed
1266
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1267 1268
**** 'sql-mode-hook' and 'sql-interactive-mode-hook' changed.
Both hook variables have had 'sql-indent-enable' added to their
Glenn Morris's avatar
Glenn Morris committed
1269 1270 1271
default values.  If you have existing customizations to these
variables, you should make sure that the new default entry is
included.
Eli Zaretskii's avatar
Eli Zaretskii committed
1272

Glenn Morris's avatar
Glenn Morris committed
1273
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1274 1275
*** Connection Wallet
Database passwords can now by stored in NETRC or JSON data files that
Glenn Morris's avatar
Glenn Morris committed
1276
may optionally be encrypted.  When establishing an interactive session
Eli Zaretskii's avatar
Eli Zaretskii committed
1277
with the database via 'sql-connect' or a product specific function,
Glenn Morris's avatar
Glenn Morris committed
1278
like 'sql-mysql' or 'sql-postgres', the password wallet will be
Glenn Morris's avatar
Glenn Morris committed
1279
searched for the password.  The 'sql-product', 'sql-server',
Eli Zaretskii's avatar
Eli Zaretskii committed
1280
'sql-database', and the 'sql-username' will be used to identify the
Glenn Morris's avatar
Glenn Morris committed
1281
appropriate authorization.  This eliminates the discouraged practice of
Eli Zaretskii's avatar
Eli Zaretskii committed
1282 1283 1284 1285
embedding database passwords in your Emacs initialization.

See the 'auth-source' module for complete documentation on the file
formats.  By default, the wallet file is expected to be in the
Glenn Morris's avatar
Glenn Morris committed
1286 1287 1288
'user-emacs-directory', named "sql-wallet" or ".sql-wallet", with
".json" (JSON) or no (NETRC) suffix.  Both file formats can optionally
be encrypted with GPG by adding an additional ".gpg" suffix.
Eli Zaretskii's avatar
Eli Zaretskii committed
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305

** Term

---
*** 'term-read-noecho' is now obsolete, use 'read-passwd' instead.

+++
*** 'serial-term' now takes an optional parameter to leave the
emulator in line mode.

** Flymake

+++
*** The variable 'flymake-diagnostic-types-alist' is obsolete.
You should instead set properties on known diagnostic symbols, like
':error' and ':warning', as demonstrated in the Flymake manual.

Glenn Morris's avatar
Glenn Morris committed
1306
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
1307 1308 1309
*** New user option 'flymake-start-on-save-buffer'.
Control whether Flymake starts checking the buffer on save.

Glenn Morris's avatar
Glenn Morris committed
1310
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
*** Flymake and backend functions may exchange hints about buffer changes.
This enables more efficient backends.  See the docstring of
'flymake-diagnostic-functions' or the Flymake manual for details.

+++
*** 'flymake-start-syntax-check-on-newline' is now obsolete,
use 'post-self-insert-hook' to check on newline.

** Ruby

Glenn Morris's avatar
Glenn Morris committed
1321
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1322 1323 1324
*** The Rubocop Flymake diagnostic function will only run Lint cops if
it can't find the config file.

Glenn Morris's avatar
Glenn Morris committed
1325
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1326 1327
*** Rubocop is called with 'bundle exec' if Gemfile mentions it.

Glenn Morris's avatar
Glenn Morris committed
1328
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1329 1330 1331 1332
*** New command 'ruby-find-library-file' bound to 'C-c C-f'.

** Package

Glenn Morris's avatar
Glenn Morris committed
1333
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347
*** Warn if "footer line" is missing, but still install package.
package.el used to refuse to install a package without the so-called
"footer line", which appears at the very end of the file:

;;; FILENAME ends here

package.el will now install packages without this line, but it will
issue a warning.  To avoid this warning, packages should keep the
"footer line".

Note that versions of Emacs older than 27.1 will not only refuse to
install packages without such a line -- they will be unable to parse
package data.  It is therefore recommended to keep this line.

Glenn Morris's avatar
Glenn Morris committed
1348 1349
+++
*** Change of 'package-check-signature' for packages with multiple sigs.
Glenn Morris's avatar
Glenn Morris committed
1350 1351
In previous Emacsen, t checked that all signatures are valid.
Now t only checks that at least one signature is valid and the new 'all'
Eli Zaretskii's avatar
Eli Zaretskii committed
1352 1353 1354 1355 1356 1357 1358 1359 1360
value needs to be used if you want to enforce that all signatures
are valid.  This only affects packages with multiple signatures.

+++
*** The meaning of 'allow-unsigned' in 'package-check-signature' has
changed slightly: If a usable OpenPGP configuration can't be found
(for instance, if gpg isn't installed), it now has the same meaning as
nil.

Glenn Morris's avatar
Glenn Morris committed
1361
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1362 1363 1364
*** New function 'package-get-version' lets packages query their own version.
Example use in auctex.el: '(defconst auctex-version (package-get-version))'

Glenn Morris's avatar
Glenn Morris committed
1365
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1366 1367 1368 1369
*** New 'package-quickstart' feature.
When 'package-quickstart' is non-nil, package.el precomputes a big
autoloads file so that activation of packages can be done much faster,
which can speed up your startup significantly.
Glenn Morris's avatar
Glenn Morris committed
1370
It also causes user options like 'package-user-dir' and
Eli Zaretskii's avatar
Eli Zaretskii committed
1371 1372 1373 1374
'package-load-list' to be consulted when 'package-quickstart-refresh'
is run rather than at startup so you don't need to set them in your
early init file.

Glenn Morris's avatar
Glenn Morris committed
1375
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397
*** New function 'package-activate-all'.

+++
*** New functions for filtering packages list.
A new function has been added which allows users to filter the
packages list by name: 'package-menu-filter-by-name'.  By default, it
is bound to '/ n'.  Additionally, the function
'package-menu-filter-by-keyword' has been renamed from
'package-menu-filter'.  Its keybinding has also been changed to '/ k'
(from 'f').  To clear any of the two filters, the user can now call
the 'package-menu-clear-filter' function, bound to '/ /' by default.

---
*** Imenu support has been added to 'package-menu-mode'.

---
*** The package list can now be sorted by version or description.

+++
*** In Package Menu, 'g' now updates package data from archives.
Previously, 'g' invoked 'tabulated-list-revert' which did not update
the cached archive data.  It is now bound to 'revert-buffer', which
Glenn Morris's avatar
Glenn Morris committed
1398
will update the data.
Eli Zaretskii's avatar
Eli Zaretskii committed
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412

'package-menu-refresh' is an obsolete alias for 'revert-buffer'.

** Info

+++
*** Clicking on the left/right arrow icon in the Info tool-bar while
holding down the Ctrl key pops up a menu of previously visited Info nodes
where you can select a node to go back (like in browsers).

---
*** Info can now follow 'file://' protocol URLs.
The 'file://' URLs in Info documents can now be followed by passing
them to the 'browse-url' function, like the other protocols: 'ftp',
Glenn Morris's avatar
Glenn Morris committed
1413
'http', and 'https'.  This allows having references to local HTML
Eli Zaretskii's avatar
Eli Zaretskii committed
1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
files, for example.

---
** Display of man pages now limits the width for formatting pages.
The new user option 'Man-width-max' (80 by default) limits the number
of columns passed to the 'man' program for formatting man pages.  This
is to enhance readability when man pages are displayed in very wide
windows (which are customary with today's large displays).

** Xref

+++
*** New command 'xref-find-definitions-at-mouse'.
This command finds definitions of the identifier at the place of a
mouse click event, and is intended to be bound to a mouse event.

+++
Glenn Morris's avatar
Glenn Morris committed
1431
*** Changing 'xref-marker-ring-length' works after xref.el is loaded.
Eli Zaretskii's avatar
Eli Zaretskii committed
1432
Previously, setting 'xref-marker-ring-length' would only take effect
Glenn Morris's avatar
Glenn Morris committed
1433
if set before xref.el was loaded.
Eli Zaretskii's avatar
Eli Zaretskii committed
1434 1435 1436 1437 1438 1439 1440 1441

---
*** 'xref-find-definitions' now sets the mark at the buffer position
where it was invoked.

---
*** New xref faces 'xref-file-header', 'xref-line-number', 'xref-match'.

Glenn Morris's avatar
Glenn Morris committed
1442
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1443 1444 1445 1446 1447
*** New user option 'xref-show-definitions-function'.
It encapsulates the logic pertinent to showing the result of
'xref-find-definitions'.  The user can change it to customize its
behavior and the display of results.

Glenn Morris's avatar
Glenn Morris committed
1448
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1449 1450 1451
*** Search results show the buffer even for one hit.
The search-type Xref commands (e.g. 'xref-find-references' or
'project-find-regexp') now show the results buffer even when there is
Glenn Morris's avatar
Glenn Morris committed
1452
only one hit.  This can be altered by changing 'xref-show-xrefs-function'.
Eli Zaretskii's avatar
Eli Zaretskii committed
1453

Glenn Morris's avatar
Glenn Morris committed
1454
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
*** Xref buffers support refreshing the search results.
A new command 'xref-revert-buffer' is bound to 'g'.

---
*** Imenu support has been added to 'xref--xref-buffer-mode'.

** Icomplete

+++
*** New minor mode Fido mode.
This mode is based on Icomplete, and its name stands for "Fake Ido".
Glenn Morris's avatar
Glenn Morris committed
1466
The point of this mode is to be an 'ido-mode' workalike, but provide
Eli Zaretskii's avatar
Eli Zaretskii committed
1467
most of the functionality present in Icomplete that is not in
Glenn Morris's avatar
Glenn Morris committed
1468
'ido-mode', while being much more compatible with all of Emacs's
Eli Zaretskii's avatar
Eli Zaretskii committed
1469 1470 1471 1472
completion facilities.

** Ecomplete

Glenn Morris's avatar
Glenn Morris committed
1473
---
Glenn Morris's avatar
Glenn Morris committed
1474
*** The Ecomplete sorting has changed to a decay-based algorithm.
Eli Zaretskii's avatar
Eli Zaretskii committed
1475 1476
This can be controlled by the new 'ecomplete-sort-predicate' user option.

Glenn Morris's avatar
Glenn Morris committed
1477
---
Glenn Morris's avatar
Glenn Morris committed
1478 1479 1480
*** The 'ecomplete-database-file' file is now placed in
"~/.emacs.d/ecompleterc" by default.  Of course it will still find it
if you have it in "~/.ecompleterc".
Eli Zaretskii's avatar
Eli Zaretskii committed
1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499

** Gnus

---
*** 'mm-uu-diff-groups-regexp' now defaults to matching all groups,
which means that "git am" diffs are recognized everywhere.

+++
*** Two new Gnus summary mode navigation commands have been added,
bound to the '[' and ']' keys: 'gnus-summary-prev-unseen-article' and
'gnus-summary-next-unseen-article'.  These take you (respectively) to
the previous unseen or next unseen article.  (These are the ones that
are marked with "." in the summary mode lines.)

+++
*** The Gnus user variable 'nnimap-expunge' supports three new values:
'never' for never expunging messages, 'immediately' for immediately
expunging deleted messages, and 'on-exit' to expunge deleted articles
when exiting the group's summary buffer.  Setting 'nnimap-expunge' to
Glenn Morris's avatar
Glenn Morris committed
1500
nil or t is still supported but not recommended, since it may
Eli Zaretskii's avatar
Eli Zaretskii committed
1501 1502 1503 1504 1505
result in Gnus expunging all messages that have been flagged as
deleted by any IMAP client (rather than just those that have been
deleted by Gnus).

+++
Glenn Morris's avatar
Glenn Morris committed
1506
*** New user option 'gnus-use-atomic-windows' makes Gnus window layouts atomic.
Glenn Morris's avatar
Glenn Morris committed
1507
See the "(elisp) Atomic Windows" node of the Elisp manual for details.
Eli Zaretskii's avatar
Eli Zaretskii committed
1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525

+++
*** There's a new value for 'gnus-article-date-headers',
'combined-local-lapsed', which will show both the time (in the local
timezone) and the lapsed time.

---
*** Gnus now maps imaps to 993 only on old MS-Windows versions.
The nnimap backend used to do this unconditionally to work around
problems on old versions of MS-Windows.  This is now done only for
Windows XP and older.

+++
*** The nnimap backend now has support for IMAP namespaces.
This feature can be enabled by setting the new 'nnimap-use-namespaces'
server variable to non-nil.

+++
Glenn Morris's avatar
Glenn Morris committed
1526 1527 1528
*** A prefix argument to 'gnus-summary-limit-to-score' will limit in reverse.
Limit to articles with score "at or below" the SCORE argument rather
than "at or above".
Eli Zaretskii's avatar
Eli Zaretskii committed
1529

Glenn Morris's avatar
Glenn Morris committed
1530
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
*** The function 'gnus-score-find-favorite-words' has been renamed
from 'gnus-score-find-favourite-words'.

---
*** Gmane has been removed as an nnir backend, since Gmane no longer
has a search engine.

+++
*** Splitting mail on common mailing list headers has been added.
See the concept index in the Gnus manual for the 'match-list' entry.

+++
*** nil is no longer an allowed value for 'mm-text-html-renderer'.

+++
Glenn Morris's avatar
Glenn Morris committed
1546 1547
*** The default value of 'mm-inline-large-images' has changed from nil
to 'resize', which means that large images will be resized instead of
Eli Zaretskii's avatar
Eli Zaretskii committed
1548 1549 1550
displayed with an external program by default.

+++
Glenn Morris's avatar
Glenn Morris committed
1551 1552 1553
*** A new Gnus summary mode command, 'S A' ('gnus-summary-attach-article')
can be used to attach the current article(s) to a pre-existing Message
buffer, or create a new Message buffer with the article(s) attached.
Eli Zaretskii's avatar
Eli Zaretskii committed
1554 1555

+++
Glenn Morris's avatar
Glenn Morris committed
1556 1557 1558
*** A new Gnus summary mode command, 'w' ('gnus-summary-browse-url')
scans the article buffer for URLs, and offers them to the user to open
with 'browse-url'.
Eli Zaretskii's avatar
Eli Zaretskii committed
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578

---
*** New user option 'nnir-notmuch-filter-group-names-function'.
This option controls whether and how to use Gnus search groups as
'path:' search terms to 'notmuch'.

---
*** The buttons in the Gnus article buffer were formerly widgets
(i.e., buttons from widget.el).  This has now changed, and they are
now buttons (from button.el), and commands like 'TAB' now search for
buttons instead of widgets.  There should be no user-visible changes,
but out-of-tree code that relied on widgets being present might now
fail.

** erc

---
*** New hook 'erc-insert-done-hook'.
This hook is called after strings have been inserted into the buffer,
and is free to alter point and window configurations, as it's not
Glenn Morris's avatar
Glenn Morris committed
1579
called from inside a 'save-excursion', as opposed to 'erc-insert-post-hook'.
Eli Zaretskii's avatar
Eli Zaretskii committed
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589

---
*** 'erc-button-google-url' has been renamed to 'erc-button-search-url'
and its value has been changed to Duck Duck Go.

---
*** 'erc-send-pre-hook' and 'erc-send-this' have been obsoleted.
The user option to use instead to alter text to be sent is now
'erc-pre-send-functions'.

Glenn Morris's avatar
Glenn Morris committed
1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601
---
*** Improve matching/highlighting of nicknames.
Open and close parenthesis and apostrophe are not considered valid
nick characters anymore, matching the given grammar in RFC 2812
section 2.3.1.  This enables correct matching and highlighting of
nicks when they are surrounded by parentheses, like "(nick)", and when
adjacent to an apostrophe, like "nick's".

---
*** Set 'erc-button-url-regexp' to 'browse-url-button-regexp'
which better handles surrounding pair of parentheses.

Eli Zaretskii's avatar
Eli Zaretskii committed
1602 1603
** EUDC

Glenn Morris's avatar
Glenn Morris committed
1604
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650
*** XEmacs support has been removed.

** eww/shr

+++
*** The new user option 'shr-cookie-policy' can be used to control
when to use cookies when fetching embedded images.  The default is to
use them when the images are from the same domain as the main HTML
document.

+++
*** The 'eww' command can now create a new EWW buffer.
Invoking the command with a prefix argument will cause it to create a
new EWW buffer for the URL instead of reusing the default one.

+++
*** Clicking with the Ctrl key or 'C-u RET' on a link opens a new tab
when tab-bar-mode is enabled.

+++
*** The 'd' ('eww-download') command now falls back to current page's URL.
If this command is invoked with no URL at point, it now downloads the
current page instead of signaling an error.

*** When opening external links in eww/shr (typically with the
'C-u RET' keystroke on a link), the link will be flashed with the new
'shr-selected-link' face to give the user feedback that the command
has been executed.

+++
*** New user option 'shr-discard-aria-hidden'.
If set, shr will not render tags with attribute 'aria-hidden="true"'.
This attribute is meant to tell screen readers to ignore a tag.

+++
*** 'shr-external-browser' has been made into an obsolete alias
of 'browse-url-secondary-browser-function'.

---
*** 'shr-tag-ol' now respects the ordered list 'start' attribute.

---
*** The following tags are now handled: '<code>', '<abbr>', and '<acronym>'.

** Htmlfontify

Glenn Morris's avatar
Glenn Morris committed
1651
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666
*** The functions 'hfy-color', 'hfy-color-vals' and
'hfy-fallback-color-values' and the variables 'hfy-fallback-color-map'
and 'hfy-rgb-txt-color-map' have been renamed from names that used
'colour' instead of 'color'.

+++
** Enriched mode supports the 'charset' text property.
You can add or modify the 'charset' text properties of text using the
'Edit->Text Properties->Special Properties' menu, or by invoking the
'facemenu-set-charset' command.  Documents in Enriched mode will be
saved with the charset properties, and those properties will be
restored when the file is visited.

** Smtpmail

Glenn Morris's avatar
Glenn Morris committed
1667
---
Eli Zaretskii's avatar
Eli Zaretskii committed
1668 1669 1670
*** Authentication mechanisms can be added via external packages, by
defining new 'cl-defmethod' of 'smtpmail-try-auth-method'.

Glenn Morris's avatar
Glenn Morris committed
1671
+++
Eli Zaretskii's avatar
Eli Zaretskii committed
1672 1673 1674 1675 1676
*** To always force smtpmail to send credentials over on the first
attempt when communicating with the SMTP server(s), the
'smtpmail-servers-requiring-authorization' user option can be used.

+++
Glenn Morris's avatar
Glenn Morris committed
1677
*** smtpmail will now try resending mail when getting a transient "4xx"