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@ -1,6 +1,6 @@
GNU Emacs NEWS -- history of user-visible changes.
Copyright (C) 2014-2017 Free Software Foundation, Inc.
Copyright (C) 2016-2017 Free Software Foundation, Inc.
See the end of the file for license conditions.
Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
@ -9,16 +9,16 @@ If possible, use M-x report-emacs-bug.
This file is about changes in Emacs version 26.
See file HISTORY for a list of GNU Emacs versions and release dates.
See files NEWS.25, NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20,
NEWS.19, NEWS.18, and NEWS.1-17 for changes in older Emacs versions.
See files NEWS.25, NEWS.24, ..., 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 necessary documentation updates are complete.
(This means all relevant manuals in doc/ AND lisp doc-strings.)
--- means no change in the manuals is needed.
+++ indicates that all necessary documentation updates have been done.
(This means all the relevant manuals in doc/ AND lisp doc-strings.)
--- means doc strings are updated, and no change in the manuals is needed.
When you add a new item, use the appropriate mark if you are sure it applies,
@ -58,7 +58,7 @@ configure option '--disable-libsystemd'.
+++
** A systemd user unit file is provided. Use it in the standard way:
systemctl --user enable emacs
'systemctl --user enable emacs'.
(If your Emacs is installed in a non-standard location, you may
need to copy the emacs.service file to eg ~/.config/systemd/user/)
@ -107,10 +107,10 @@ requirements. The option makes Emacs abort if a module-related
assertion triggers.
+++
** Emacs now supports 24-bit colors on capable text terminals
** Emacs now supports 24-bit colors on capable text terminals.
Terminal is automatically initialized to use 24-bit colors if the
required capabilities are found in terminfo. See the FAQ node
"Colors on a TTY" for more information.
"(efaq) Colors on a TTY" for more information.
+++
** Emacs now obeys the X resource "scrollBar" at startup.
@ -121,8 +121,8 @@ The effect is similar to that of "toolBar" resource on the tool bar.
+++
** Option 'buffer-offer-save' can be set to new value, 'always'. When
set to 'always', the command `save-some-buffers' will always offer
this buffer for saving.
set to 'always', the command 'save-some-buffers' will always offer
this buffer for saving.
** Security vulnerability related to Enriched Text mode is removed.
@ -176,8 +176,8 @@ explicitly yields. Global variables are shared among all threads, but
a 'let' binding is thread-local. Each thread also has its own current
buffer and its own match data.
See the chapter "Threads" in the ELisp manual for full documentation
of these facilities.
See the chapter "(elisp) Threads" in the ELisp manual for full
documentation of these facilities.
+++
** The new user variable 'electric-quote-chars' provides a list
@ -224,8 +224,9 @@ frame by evaluating this form:
(modify-frame-parameters nil '((inhibit-double-buffering . t)))
---
The group 'wp', whose label was "text", is now deprecated.
Use the new group 'text', which inherits from 'wp', instead.
** The customization group 'wp', whose label was "text", is now
deprecated. Use the new group 'text', which inherits from 'wp',
instead.
+++
** The new function 'call-shell-region' executes a command in an
@ -339,13 +340,13 @@ eliminated, and integer strings work everywhere.
** It is possible to disable attempted recovery on fatal signals.
Two new variables support disabling attempts to recover from stack
overflow and to avoid automatic auto-save when Emacs is delivered a
fatal signal. 'attempt-stack-overflow-recovery', if set to 'nil',
fatal signal. 'attempt-stack-overflow-recovery', if set to nil,
will disable attempts to recover from C stack overflows; Emacs will
then crash as with any other fatal signal.
'attempt-orderly-shutdown-on-fatal-signal', if set to 'nil', will
'attempt-orderly-shutdown-on-fatal-signal', if set to nil, will
disable attempts to auto-save the session and shut down in an orderly
fashion when Emacs receives a fatal signal; instead, Emacs will
terminate immediately. Both variables are non-'nil' by default.
terminate immediately. Both variables are non-nil by default.
These variables are for users who would like to avoid the small
probability of data corruption due to techniques Emacs uses to recover
in these situations.
@ -362,7 +363,7 @@ See the variable 'dir-locals-file-2' for more information.
+++
** Connection-local variables can be used to specify local variables
with a value depending on the connected remote server. For details,
see the node "Connection Local Variables" in the ELisp manual.
see the node "(elisp) Connection Local Variables" in the ELisp manual.
---
** International domain names (IDNA) are now encoded via the new
@ -374,6 +375,9 @@ where you can cancel them with the 'c' command.
+++
** 'switch-to-buffer-preserve-window-point' now defaults to t.
Applications that call 'switch-to-buffer' and want to show the buffer at
the position of its point should use 'pop-to-buffer-same-window' in lieu
of 'switch-to-buffer'.
+++
** The new variable 'debugger-stack-frame-as-list' allows displaying
@ -382,7 +386,7 @@ debug.el and edebug.el have been updated to heed to this variable.
---
** Values in call stack frames are now displayed using 'cl-prin1'.
The old behaviour of using 'prin1' can be restored by customizing the
The old behavior of using 'prin1' can be restored by customizing the
new option 'debugger-print-function'.
+++
@ -420,17 +424,17 @@ want to reverse the direction of the scroll, customize
'mwheel-flip-direction'.
+++
** Emacsclient has a new option -u/--suppress-output.
** Emacsclient has a new option '-u' / '--suppress-output'.
This option suppresses display of return values from the server
process.
+++
** Emacsclient has a new option -T/--tramp.
** Emacsclient has a new option '-T' / '--tramp'.
This helps with using a local Emacs session as the server for a remote
emacsclient. With appropriate setup, one can now set the EDITOR
environment variable on a remote machine to emacsclient, and
use the local Emacs to edit remote files via Tramp. See the node
"emacsclient Options" in the user manual for the details.
"(emacs) emacsclient Options" in the user manual for the details.
---
** New user option 'dig-program-options' and extended functionality
@ -456,17 +460,17 @@ display of raw bytes from octal to hex.
+++
** You can now provide explicit field numbers in format specifiers.
For example, '(format "%2$s %1$s" "X" "Y")' produces "Y X".
For example, '(format "%2$s %1$s %2$s" "X" "Y")' produces "Y X Y".
+++
** Emacs now supports optional display of line numbers in the buffer.
This is similar to what linum-mode provides, but much faster and
This is similar to what 'linum-mode' provides, but much faster and
doesn't usurp the display margin for the line numbers. Customize the
buffer-local variable 'display-line-numbers' to activate this optional
display. Alternatively, you can use the `display-line-numbers-mode'
minor mode or the global `global-display-line-numbers-mode'. When
using these modes, customize `display-line-numbers-type' with the same
value as you would use with `display-line-numbers'.
display. Alternatively, you can use the 'display-line-numbers-mode'
minor mode or the global 'global-display-line-numbers-mode'. When
using these modes, customize 'display-line-numbers-type' with the same
value as you would use with 'display-line-numbers'.
Line numbers are not displayed at all in minibuffer windows and in
tooltips, as they are not useful there.
@ -480,17 +484,20 @@ Lisp programs that need to know how much screen estate is used up for
line-number display in a window can use the new function
'line-number-display-width'.
Linum mode and all similar packages are henceforth becoming obsolete.
'linum-mode' and all similar packages are henceforth becoming obsolete.
Users and developers are encouraged to switch to this new feature
instead.
+++
** emacsclient now accepts command-line options in ALTERNATE_EDITOR
and --alternate-editor. For example, ALTERNATE_EDITOR="emacs -Q -nw".
and '--alternate-editor'. For example, ALTERNATE_EDITOR="emacs -Q -nw".
Arguments may be quoted "like this", so that for example an absolute
path containing a space may be specified; quote escaping is not
supported.
** The new user option 'arabic-shaper-ZWNJ-handling' controls how to
handle ZWNJ in Arabic text rendering.
* Editing Changes in Emacs 26.1
@ -523,8 +530,8 @@ the end of the window, e.g. "5-17%". The new option
+++
** Two new user options 'list-matching-lines-jump-to-current-line' and
'list-matching-lines-current-line-face' to show highlighted the current
line in *Occur* buffer.
'list-matching-lines-current-line-face' to show the current line
highlighted in *Occur* buffer.
+++
** The 'occur' command can now operate on the region.
@ -587,7 +594,7 @@ different buffer while keeping point, mark, markers, and text
properties as intact as possible.
+++
** New commands 'apropos-local-variable' and 'apropos-local-value.
** New commands 'apropos-local-variable' and 'apropos-local-value'.
These are buffer-local versions of 'apropos-variable' and
'apropos-value', respectively. They show buffer-local variables whose
names and values, respectively, match a given pattern.
@ -607,7 +614,11 @@ state to take effect (making a frame visible, for example).
* Changes in Specialized Modes and Packages in Emacs 26.1
---
** New function `cl-generic-p'.
** Emacs 26.1 comes with Org v9.1.2.
See the file ORG-NEWS for user-visible changes in Org.
---
** New function 'cl-generic-p'.
** Dired
@ -623,12 +634,12 @@ remaining directories without more prompts.
It gets replaced by the current file name, like ' ? '.
+++
*** A new option 'dired-always-read-filesystem' default to nil.
If non-nil, buffers visiting files are reverted before search them;
for instance, in 'dired-mark-files-containing-regexp' a non-nil value
of this option means the file is revisited in a temporary buffer;
this temporary buffer is the actual buffer searched: the original buffer
visiting the file is not modified.
*** A new option 'dired-always-read-filesystem' defaulting to nil.
If non-nil, buffers visiting files are reverted before they are
searched; for instance, in 'dired-mark-files-containing-regexp' a
non-nil value of this option means the file is revisited in a
temporary buffer; this temporary buffer is the actual buffer searched:
the original buffer visiting the file is not modified.
---
*** Users can now customize mouse clicks in Dired in a more flexible way.
@ -659,17 +670,17 @@ keep previous behavior.
** html2text is now marked obsolete.
---
** smerge-refine-regions can refine regions in separate buffers
** smerge-refine-regions can refine regions in separate buffers.
---
** Info menu and index completion uses substring completion by default.
This can be customized via the info-menu category in
completion-category-override.
This can be customized via the 'info-menu' category in
'completion-category-overrides'.
+++
** The ancestor buffer is shown by default in 3-way merges.
A new option ediff-show-ancestor and a new toggle
ediff-toggle-show-ancestor.
A new option 'ediff-show-ancestor' and a new toggle
'ediff-toggle-show-ancestor'.
---
** TeX: Add luatex and xetex as alternatives to pdftex
@ -700,7 +711,7 @@ bound to 'Buffer-menu-unmark-all-buffers'.
** Gnus
---
*** The .newsrc file will now only be saved if the native select
*** The ~/.newsrc file will now only be saved if the native select
method is an NNTP select method.
+++
@ -709,9 +720,10 @@ added: 'C-c C-s C-m C-m'.
+++
*** In message-citation-line-format the %Z format is now the time zone name
instead of the numeric form. The %z format continues to be the
numeric form. The new behavior is compatible with format-time-string.
*** In 'message-citation-line-format' the '%Z' format is now the time
zone name instead of the numeric form. The '%z' format continues to
be the numeric form. The new behavior is compatible with
'format-time-string'.
** Ibuffer
@ -778,7 +790,7 @@ whose content matches a regexp; bound to '% g'.
---
*** New user option 'comint-move-point-for-matching-input' to control
where to place point after C-c M-r and C-c M-s.
where to place point after 'C-c M-r' and 'C-c M-s'.
** Compilation mode
@ -811,7 +823,7 @@ breakpoint (e.g. with "f" and "o") by customizing the new option
'edebug-sit-on-break'.
+++
*** New customizable option 'edebug-max-depth'
*** New customizable option 'edebug-max-depth'.
This allows to enlarge the maximum recursion depth when instrumenting
code.
@ -853,7 +865,6 @@ bigger than the current window).
avoid accidentally accessing remote links may rebind 'w' and 'u' in
'eww-link-keymap' to it.
** Ido
---
@ -886,8 +897,8 @@ also available in 'image-mode'.
+++
*** A new library for creating and manipulating SVG images has been
added. See the "SVG Images" section in the Lisp reference manual for
details.
added. See the "(elisp) SVG Images" section in the ELisp reference
manual for details.
+++
*** New setf-able function to access and set image parameters is
@ -929,10 +940,10 @@ instead of shell command strings. This change affects
'image-dired-cmd-write-exif-data-options',
'image-dired-cmd-read-exif-data-options', and introduces
'image-dired-cmd-pngnq-options', 'image-dired-cmd-pngcrush-options',
'image-dired-cmd-create-standard-thumbnail-options'
'image-dired-cmd-create-standard-thumbnail-options'.
---
*** Recognizes more tools by default, including pngnq-s9 and OptiPNG
*** Recognizes more tools by default, including pngnq-s9 and OptiPNG.
---
*** 'find-file' and related commands now work on thumbnails and
@ -971,7 +982,7 @@ there are now top-level domains added all the time. Message will no
longer warn about sending emails to top-level domains it hasn't heard
about.
*** 'message-beginning-of-line' (bound to C-a) understands folded headers.
*** 'message-beginning-of-line' (bound to 'C-a') understands folded headers.
In 'visual-line-mode' it will look for the true beginning of a header
while in non-'visual-line-mode' it will move the point to the indented
header's value.
@ -981,7 +992,7 @@ header's value.
+++
*** The new variable 'package-gnupghome-dir' has been added to control
where the GnuPG home directory (used for signature verification) is
located and whether GnuPG's option "--homedir" is used or not.
located and whether GnuPG's option '--homedir' is used or not.
---
*** Deleting a package no longer respects 'delete-by-moving-to-trash'.
@ -1063,8 +1074,8 @@ background.
+++
** Emacs now supports character name escape sequences in character and
string literals. The syntax variants \N{character name} and
\N{U+code} are supported.
string literals. The syntax variants '\N{character name}' and
'\N{U+code}' are supported.
+++
** Prog mode has some support for multi-mode indentation.
@ -1076,7 +1087,7 @@ A major mode can provide indentation context for a sub-mode through
the 'prog-indentation-context' variable. To support this, modes that
provide indentation should use 'prog-widen' instead of 'widen' and
'prog-first-column' instead of a literal zero. See the node
"Mode-Specific Indent" in the ELisp manual for more details.
"(elisp) Mode-Specific Indent" in the ELisp manual for more details.
** ERC
@ -1095,7 +1106,7 @@ domain.
*** 'url-retrieve-synchronously' now takes an optional timeout parameter.
---
*** The URL package now support HTTPS over proxies supporting CONNECT.
*** The URL package now supports HTTPS over proxies supporting CONNECT.
+++
*** 'url-user-agent' now defaults to 'default', and the User-Agent
@ -1133,17 +1144,29 @@ to a format suitable for reverse lookup zone files.
+++
*** Enchant is now supported as a spell-checker.
Enchant is a meta-spell-checker that uses providers
such as Hunspell to do the actual checking. With it, users can use
spell-checkers not directly supported by Emacs, such as Voikko, Hspell
and AppleSpell, more easily share personal word-lists with other
programs, and configure different spelling-checkers for different
languages. (Version 2.1.0 or later of Enchant is required.)
Enchant is a meta-spell-checker that uses providers such as Hunspell
to do the actual checking. With it, users can use spell-checkers not
directly supported by Emacs, such as Voikko, Hspell and AppleSpell,
more easily share personal word-lists with other programs, and
configure different spelling-checkers for different languages.
(Version 2.1.0 or later of Enchant is required.)
** Flymake
+++
*** Emacs no longer prompts the user before killing Flymake processes on exit.
*** Flymake has been completely redesigned
Flymake now annotates arbitrary buffer regions, not just lines. It
supports arbitrary diagnostic types, not just errors and warnings (see
variable 'flymake-diagnostic-types-alist').
It also supports multiple simultaneous backends, meaning that you can
check your buffer from different perspectives (see variable
'flymake-diagnostic-functions'). Backends for Emacs Lisp mode are
provided.
The old Flymake behavior is preserved in the so-called "legacy
backend", which has been updated to benefit from the new UI features.
* New Modes and Packages in Emacs 26.1
@ -1159,10 +1182,10 @@ languages. (Version 2.1.0 or later of Enchant is required.)
mode for *.html files. This mode handles indentation,
fontification, and commenting for embedded JavaScript and CSS.
** New mode 'conf-toml-mode' is a sub-mode of conf-mode, specialized
for editing TOML files.
** New mode 'conf-toml-mode' is a sub-mode of 'conf-mode', specialized
for editing TOML files.
** New mode 'conf-desktop-mode' is a sub-mode of conf-unix-mode,
** New mode 'conf-desktop-mode' is a sub-mode of 'conf-unix-mode',
specialized for editing freedesktop.org desktop entries.
** New minor mode 'pixel-scroll-mode' provides smooth pixel-level scrolling.
@ -1174,11 +1197,11 @@ editing Less files.
* Incompatible Lisp Changes in Emacs 26.1
---
*** password-data is now a hash-table
so that `password-read' can use any object for the `key' argument.
** 'password-data' is now a hash-table so that 'password-read' can use
any object for the 'key' argument.
+++
*** Command 'dired-mark-extension' now automatically prepends a '.' to the
** Command 'dired-mark-extension' now automatically prepends a '.' to the
extension when not present. The new command 'dired-mark-suffix' behaves
similarly but it doesn't prepend a '.'.
@ -1202,25 +1225,29 @@ binding syntax as 'and-let*'.
---
** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
mode to send the same escape sequences that xterm does. This makes
things like forward-word in readline work.
things like 'forward-word' in readline work.
---
** hideshow mode got four key bindings that are analogous to outline
mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e.'
mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e'.
---
** Customizable variable 'query-replace-from-to-separator'
now doesn't propertize the string value of the separator.
Instead, text properties are added by query-replace-read-from.
Instead, text properties are added by 'query-replace-read-from'.
Additionally, the new nil value restores pre-24.5 behavior
of not providing replacement pairs via the history.
---
** Some obsolete functions, variables, and faces have been removed:
*** make-variable-frame-local. Variables cannot be frame-local any more.
*** From subr.el: window-dot, set-window-dot, read-input, show-buffer,
eval-current-buffer, string-to-int
*** icomplete-prospects-length.
*** 'make-variable-frame-local'. Variables cannot be frame-local any more.
*** From subr.el: 'window-dot', 'set-window-dot', 'read-input',
'show-buffer', 'eval-current-buffer', 'string-to-int'.
*** 'icomplete-prospects-length'.
*** All the default-FOO variables that hold the default value of the
FOO variable. Use 'default-value' and 'setq-default' to access and
change FOO, respectively. The exhaustive list of removed variables is:
@ -1238,7 +1265,8 @@ change FOO, respectively. The exhaustive list of removed variables is:
'default-cursor-in-non-selected-windows',
'default-buffer-file-coding-system', 'default-major-mode', and
'default-enable-multibyte-characters'.
*** Many variables obsoleted in 22.1 referring to face symbols
*** Many variables obsoleted in 22.1 referring to face symbols.
+++
** The variable 'text-quoting-style' is now a customizable option. It
@ -1253,9 +1281,9 @@ now generate less chatter and more-compact diagnostics. The auxiliary
function 'check-declare-errmsg' has been removed.
+++
** The regular expression character class [:blank:] now matches
** The regular expression character class '[:blank:]' now matches
Unicode horizontal whitespace as defined in the Unicode Technical
Standard #18. If you only want to match space and tab, use [ \t]
Standard #18. If you only want to match space and tab, use '[ \t]'
instead.
+++
@ -1277,8 +1305,8 @@ characters: ‘’‛“”‟〞＂＇, unless they are escaped with backslash.
+++
** 'default-file-name-coding-system' now defaults to a coding system
that does not process CRLF. For example, it defaults to utf-8-unix
instead of to utf-8. Before this change, Emacs would sometimes
that does not process CRLF. For example, it defaults to 'utf-8-unix'
instead of to 'utf-8'. Before this change, Emacs would sometimes
mishandle file names containing these control characters.
+++
@ -1349,9 +1377,10 @@ documentation and had inherent races that led to security holes. A
call like (rename-file C D) that used the old, undocumented behavior
can be written as (rename-file C (file-name-as-directory D)), a
formulation portable to both older and newer versions of Emacs.
Affected functions include add-name-to-file, copy-directory,
copy-file, format-write-file, gnus-copy-file, make-symbolic-link,
rename-file, thumbs-rename-images, and write-file.
Affected functions include 'add-name-to-file', 'copy-directory',
'copy-file', 'format-write-file', 'gnus-copy-file',
'make-symbolic-link', 'rename-file', 'thumbs-rename-images', and
'write-file'.
---
** The list returned by 'overlays-at' is now in decreasing priority order.
@ -1361,12 +1390,22 @@ non-nil, but the code returned the list in the increasing order of
priority instead. Now the code does what the documentation says it
should do.
+++
** 'format' now avoids allocating a new string in more cases.
'format' was previously documented to return a newly-allocated string,
but this documentation was not correct, as (eq x (format x)) returned
t when x was the empty string. 'format' is no longer documented to
return a newly-allocated string, and the implementation now takes
advantage of the doc change to avoid making copies of strings in
common cases like (format "foo") and (format "%s" "foo").
---
** The function 'eldoc-message' now accepts a single argument.
Programs that called it with multiple arguments before should pass
them through 'format' first. Even that is discouraged: for ElDoc
support, you should set 'eldoc-documentation-function' instead of
calling 'eldoc-message' directly.
* Lisp Changes in Emacs 26.1
@ -1425,9 +1464,7 @@ range of indentation.
** New optional argument TEXT in 'make-temp-file'.
---
** New function `define-symbol-prop'.
** Checksum/Hash
** New function 'define-symbol-prop'.
+++
** New function 'secure-hash-algorithms' to list the algorithms that
@ -1509,7 +1546,7 @@ function instead of 'subr-arity'.
** New function 'region-bounds' can be used in the interactive spec
to provide region boundaries (for rectangular regions more than one)
to an interactively callable function as a single argument instead of
two separate arguments region-beginning and region-end.
two separate arguments 'region-beginning' and 'region-end'.
+++
** 'parse-partial-sexp' state has a new element. Element 10 is
@ -1539,34 +1576,27 @@ compares their numerical values. According to this predicate,
---
** Numeric comparisons and 'logb' no longer return incorrect answers
due to internal rounding errors. For example, (< most-positive-fixnum
(+ 1.0 most-positive-fixnum)) now correctly returns t on 64-bit hosts.
due to internal rounding errors. For example, '(< most-positive-fixnum
(+ 1.0 most-positive-fixnum))' now correctly returns t on 64-bit hosts.
---
** The functions 'ffloor', 'fceiling', 'ftruncate' and 'fround' now
accept only floating-point arguments, as per their documentation.
Formerly, they quietly accepted integer arguments and sometimes
returned nonsensical answers, e.g., (< N (ffloor N)) could return t.
returned nonsensical answers, e.g., '(< N (ffloor N))' could return t.
---
** On hosts like GNU/Linux x86-64 where a 'long double' fraction
contains at least EMACS_INT_WIDTH - 3 bits, 'format' no longer returns
incorrect answers due to internal rounding errors when formatting
Emacs integers with %e, %f, or %g conversions. For example, on these
hosts (eql N (string-to-number (format "%.0f" N))) now returns t for
all Emacs integers N.
+++
** 'format' is no longer documented to return a newly-allocated string.
This documentation was not correct, as (eq x (format x)) returned t
when x was the empty string. 'format' now takes advantage of the doc
change to avoid making copies of strings in common cases like (format
"foo") and (format "%s" "foo").
Emacs integers with '%e', '%f', or '%g' conversions. For example, on
these hosts '(eql N (string-to-number (format "%.0f" N)))' now returns
t for all Emacs integers N.
---
** Calls that accept floating-point integers (for use on hosts with
limited integer range) now signal an error if arguments are not
integral. For example (decode-char 'ascii 0.5) now signals an error.
integral. For example '(decode-char 'ascii 0.5)' now signals an error.
+++
** The new function 'char-from-name' converts a Unicode name string
@ -1601,7 +1631,7 @@ ABBR is a time zone abbreviation. The affected functions are
'format-time-string', and 'set-time-zone-rule'.
+++
** 'format-time-string' now formats "%q" to the calendar quarter.
** 'format-time-string' now formats '%q' to the calendar quarter.
+++
** New built-in function 'mapcan'.
@ -1678,7 +1708,7 @@ run.
frame's outer border.
+++
*** New frame parameters and changed semantics for older ones
*** New frame parameters and changed semantics for older ones:
+++
**** 'z-group' positions a frame above or below all others.
@ -1689,8 +1719,8 @@ frame.
+++
**** 'parent-frame' makes a frame the child frame of another Emacs
frame. The section "Child Frames" in the Elisp manual describes the
intrinsics of that relationship.
frame. The section "(elisp) Child Frames" in the ELisp manual
describes the intrinsics of that relationship.
+++
**** 'delete-before' triggers deletion of one frame before that of
@ -1706,7 +1736,7 @@ frame.
+++
**** 'skip-taskbar' removes a frame's icon from the taskbar and has
Alt-<TAB> skip this frame.
'Alt-<TAB>' skip this frame.
+++
**** 'no-focus-on-map' avoids that a frame gets input focus when mapped.
@ -1775,19 +1805,18 @@ internal border.
WINDOW for redisplay.
+++
*** Support for side windows is now official.
The display action function 'display-buffer-in-side-window' will
display its buffer in a side window. Functions for toggling all side
windows on a frame, changing and reversing the layout of side windows
and returning the main (major non-side) window of a frame are
provided. For details consult the section "Side Windows" in the Elisp
manual.
*** Support for side windows is now official. The display action
function 'display-buffer-in-side-window' will display its buffer in a
side window. Functions for toggling all side windows on a frame,
changing and reversing the layout of side windows and returning the
main (major non-side) window of a frame are provided. For details
consult the section "(elisp) Side Windows" in the ELisp manual.
+++
*** Support for atomic windows - rectangular compositions of windows
treated by 'split-window', 'delete-window' and 'delete-other-windows'
like a single live window - is now official. For details consult the
section "Atomic Windows" in the Elisp manual.
section "(elisp) Atomic Windows" in the ELisp manual.
+++
*** New 'display-buffer' alist entry 'window-parameters' allows to
@ -1833,30 +1862,38 @@ window's body.
+++
*** The semantics of 'mouse-autoselect-window' has changed slightly.
For details see the section "Mouse Window Auto-selection" in the Elisp
manual.
For details see the section "(elisp) Mouse Window Auto-selection" in
the ELisp manual.
---
*** 'select-frame-by-name' now may return a frame on another display
if it does not find a suitable one on the current display.
---
** 'tcl-auto-fill-mode' is now declared obsolete. Its functionality
can be replicated simply by setting 'comment-auto-fill-only-comments'.
** New pcase pattern 'rx' to match against a rx-style regular expression.
** New pcase pattern 'rx' to match against an rx-style regular expression.
For details, see the doc string of 'rx--pcase-macroexpander'.
---
** New functions to set region from secondary selection and vice versa.
The new functions 'secondary-selection-to-region' and
'secondary-selection-from-region' let you set the beginning and the
end of the region from those of the secondary selection and vise
end of the region from those of the secondary selection and vice
versa.
** New function 'lgstring-remove-glyph' can be used to modify a
gstring returned by the underlying layout engine (e.g. m17n-flt,
uniscribe).
* Changes in Emacs 26.1 on Non-Free Operating Systems
+++
** Intercepting hotkeys on Windows 7 and later now works better.
The new keyboard hooking code properly grabs system hotkeys such as
Win-* and Alt-TAB, in a way that Emacs can get at them before the
'Win-*' and 'Alt-TAB', in a way that Emacs can get at them before the
system. This makes the 'w32-register-hot-key' functionality work
again on all versions of MS-Windows starting with Windows 7. On
Windows NT and later you can now register any hotkey combination. (On