When you add a new item, use the appropriate mark if you are sure it applies,
otherwise leave it unmarked.
+\f
+* Installation Changes in Emacs 25.2
+
+** 'configure' detects the kqueue file notification library on *BSD
+and Mac OS X machines.
+
+\f
+* Changes in Specialized Modes and Packages in Emacs 25.2
+
+** File Notifications
+
+*** The kqueue library is integrated for *BSD and Mac OS X machines.
+
\f
* Installation Changes in Emacs 25.1
\f
* Changes in Emacs 25.1
-+++
-** Any file of the form .dir-locals*.el is now considered a dir-local
-file, and multiple such files can be used in the same directory. See
-the variable `dir-locals-file' for more information.
+** Emacs can now load shared/dynamic libraries (modules).
+A dynamic Emacs module is a shared library that provides additional
+functionality for use in Emacs Lisp programs, just like a package
+written in Emacs Lisp would. The functions `load', `require',
+`load-file', etc. were extended to load such modules, as they do with
+Emacs Lisp packages. The new variable `module-file-suffix' holds the
+system-dependent value of the file-name extension (`.so' on Posix
+hosts) of the module files.
----
-** `xref-find-definitions' and `describe-function' now display
-information about mode local overrides (defined by cedet/mode-local.el
-`define-overloadable-function' `define-mode-local-overrides').
+A module should export a C-callable function named
+`emacs_module_init', which Emacs will call as part of the call to
+`load' or `require' which loads the module. It should also export a
+symbol named `plugin_is_GPL_compatible' to indicate that its code is
+released under the GPL or compatible license; Emacs will refuse to
+load modules that don't export such a symbol.
-+++
-** New `display-buffer' action function `display-buffer-use-some-frame'.
-This displays the buffer in an existing frame other than the current
-frame, and allows the caller to specify a frame predicate to exclude
-frames.
+If a module needs to call Emacs functions, it should do so through the
+API defined and documented in the header file `emacs-module.h'. Note
+that any module that provides Lisp-callable functions will have to use
+Emacs functions such as `fset' and `funcall', in order to register its
+functions with the Emacs Lisp interpreter.
-+++
-** New documentation command `describe-symbol'.
-Works for functions, variables, faces, etc. It is bound to `C-h o' by
-default.
+Modules can create `user-ptr' Lisp objects that embed pointers to C
+struct's defined by the module. This is useful for keeping around
+complex data structures created by a module, to be passed back to the
+module's functions. User-ptr objects can also have associated
+"finalizers" -- functions to be run when the object is GC'ed; this is
+useful for freeing any resources allocated for the underlying data
+structure, such as memory, open file descriptors, etc. A new
+predicate `user-ptrp' returns non-nil if its argument is a `user-ptr'
+object.
+
+Loadable modules in Emacs are an experimental feature, and subject to
+change in future releases. For that reason, their support is disabled
+by default, and must be enabled by using the `--with-modules' option
+at configure time.
+++
-** New function `custom-prompt-customize-unsaved-options' checks for
-unsaved customizations and prompts user to customize (if found). It
-is intended for adding to 'kill-emacs-query-functions'.
+** Any file of the form .dir-locals*.el is now considered a dir-local
+file, and multiple such files can be used in the same directory. See
+the variable `dir-locals-file' for more information.
+++
** Network security (TLS/SSL certificate validity and the like) is
added via the new Network Security Manager (NSM) and controlled via
the `network-security-level' variable.
+---
+** International domain names (IDNA) are now encoded via the new
+puny.el library, so that one can visit web sites like
+"http://méxico.icom.museum".
+
+** If Emacs isn't built with TLS support, an external TLS-capable
+program is used instead. This program used to be run in --insecure
+mode by default, but has now changed to be secure instead, and will
+fail if you try to connect to non-verifiable hosts. This is
+controlled by the `tls-program' variable.
+
+++
** C-h l now also lists the commands that were run.
-+++
-** x-select-enable-clipboard is renamed select-enable-clipboard
-and x-select-enable-primary is renamed select-enable-primary.
+** The new M-s M-w key binding uses eww to search the web for the
+text in the region.
+
+** M-x suggests shorthands and ignores obsolete commands for completion.
+** x-select-enable-clipboard is renamed select-enable-clipboard.
+x-select-enable-primary and renamed select-enable-primary.
Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
name it), with the proviso that on some systems (e.g. Windows)
select-enable-primary is ineffective since the system doesn't
have the equivalent of a primary selection.
+++
-** terpri gets an optional arg ENSURE to conditionally output a newline.
+** New option `switch-to-buffer-in-dedicated-window' allows to customize
+how `switch-to-buffer' proceeds interactively when the selected window
+is strongly dedicated to its buffer.
+++
-** New macro `define-advice'.
+** The option `even-window-heights' has been renamed to
+`even-window-sizes' and now handles window widths as well.
+
++++
+** terpri gets an optional arg ENSURE to conditionally output a newline.
+++
** `insert-register' now leaves point after the inserted text
hiding character but the default `.' can be used by let-binding the
variable `read-hide-char'.
-** Emacs can now load shared/dynamic libraries (modules).
-A dynamic Emacs module is a shared library that provides additional
-functionality for use in Emacs Lisp programs, just like a package
-written in Emacs Lisp would. The functions `load', `require',
-`load-file', etc. were extended to load such modules, as they do with
-Emacs Lisp packages. The new variable `module-file-suffix' holds the
-system-dependent value of the file-name extension (`.so' on Posix
-hosts) of the module files.
-
-A module should export a C-callable function named
-`emacs_module_init', which Emacs will call as part of the call to
-`load' or `require' which loads the module. It should also export a
-symbol named `plugin_is_GPL_compatible' to indicate that its code is
-released under the GPL or compatible license; Emacs will refuse to
-load modules that don't export such a symbol.
-
-If a module needs to call Emacs functions, it should do so through the
-API defined and documented in the header file `emacs-module.h'. Note
-that any module that provides Lisp-callable functions will have to use
-Emacs functions such as `fset' and `funcall', in order to register its
-functions with the Emacs Lisp interpreter.
-
-Modules can create `user-ptr' Lisp objects that embed pointers to C
-struct's defined by the module. This is useful for keeping around
-complex data structures created by a module, to be passed back to the
-module's functions. User-ptr objects can also have associated
-"finalizers" -- functions to be run when the object is GC'ed; this is
-useful for freeing any resources allocated for the underlying data
-structure, such as memory, open file descriptors, etc. A new
-predicate `user-ptrp' returns non-nil if its argument is a `user-ptr'
-object.
-
-Loadable modules in Emacs are an experimental feature, and subject to
-change in future releases. For that reason, their support is disabled
-by default, and must be enabled by using the `--with-modules' option
-at configure time.
-
---
** New input method: `tamil-dvorak'.
hesitant operation during auto-repeat of C-v, M-v at the cost of
possible inaccuracies in the end position.
++++
+** New documentation command `describe-symbol'.
+Works for functions, variables, faces, etc. It is bound to `C-h o' by
+default.
+
++++
+** New function `custom-prompt-customize-unsaved-options' checks for
+unsaved customizations and prompts user to customize (if found). It
+is intended for adding to 'kill-emacs-query-functions'.
+
\f
* Changes in Specialized Modes and Packages in Emacs 25.1
It raises an error if a bookmark of that name already exists,
unlike `bookmark-set' which silently updates an existing bookmark.
+** IMAP
+
+---
+*** `imap-ssl-program' has been removed, and imap.el uses the internal
+GnuTLS encryption functions if possible.
+
** JSON
---
`erc-network-hide-list' and `erc-channel-hide-list' will only hide the
specified message types for the respective specified targets.
+*** New variable `erc-default-port-tls' used to connect to TLS IRC
+servers.
+
** Midnight-mode
---
instrumented function.
** ElDoc
+
++++
*** New minor mode `global-eldoc-mode'
+It is turned on by default, and affects `*scratch*' and other buffers
+whose major mode supports Emacs Lisp.
+
+---
*** `eldoc-documentation-function' now defaults to `ignore'
+
+---
*** `describe-char-eldoc' displays information about character at point,
and can be used as a default value of `eldoc-documentation-function'. It is
useful when, for example, one needs to distinguish various spaces (e.g. ] [,
whether to use variable-pitch fonts or not. The user can also
customize the `shr-use-fonts' variable.
++++
+*** A new command `C' (`eww-toggle-colors) can be used to toggle
+whether to use the HTML-specified colors or not. The user can also
+customize the `shr-use-colors variable.
+
+++
*** A new command `R' (`eww-readable') will try do identify the main
textual parts of a web page and display only that, leaving menus and
** Message mode
+---
*** text/html messages that contain inline image parts will be
transformed into multipart/related messages before sending.
-** pcase
-*** New UPatterns `quote', `app', `cl-struct', and `eieio'.
-*** New UPatterns can be defined with `pcase-defmacro'.
+++
-*** New vector QPattern.
+** In Show Paren Mode, a parenthesis can be highlighted when point
+stands inside it, and certain parens can be highlighted when point is
+at BOL or EOL, or in whitespace there. To enable these, customize,
+respectively, `show-paren-when-point-inside-paren' or
+`show-paren-when-point-in-periphery'.
** Lisp mode
*** Strings after `:documentation' are highlighted as docstrings.
** Rectangle editing
+
++++
*** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
+
++++
*** C-x C-x in rectangle-mark-mode now cycles through the four corners.
*** `string-rectangle' provides on-the-fly preview of the result.
-** New font-lock functions font-lock-ensure and font-lock-flush, which
-should be used instead of font-lock-fontify-buffer when called from Elisp.
++++
+** New font-lock functions `font-lock-ensure' and `font-lock-flush'.
+These should be used in preference to `font-lock-fontify-buffer' when
+called from Lisp.
-** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
-appending FUN to `minibuffer-setup-hook'.
+---
+** Macro `minibuffer-with-setup-hook' can optionally append a function
+to `minibuffer-setup-hook'.
+
+If the first argument of the macro is of the form `(:append FUN)',
+then FUN will be appended to `minibuffer-setup-hook', instead of
+prepending it.
** cl-lib
-*** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
++++
+*** New functions `cl-fresh-line', `cl-digit-char-p', and `cl-parse-integer'.
** Calendar and diary
**** The nil and list forms of `diary-display-function'.
++++
** New ERT function `ert-summarize-tests-batch-and-exit'.
+If the output of ERT tests in batch mode execution can be saved to a
+log file, then it can be passed as an argument to the above function
+to produce a neat summary.
** New js.el option `js-indent-first-init'.
+** Info
+
+---
+** Info mode now displays symbol names in fixed-pitch font.
+If you want to get the old behavior back, customize the `Info-quoted'
+face to use the same definitions as the default face.
+
---
-** `Info-fontify-maximum-menu-size' can be t for no limit.
+*** `Info-fontify-maximum-menu-size' can be t for no limit.
+++
-** `info-display-manual' can now be given a prefix argument which (any
+*** `info-display-manual' can now be given a prefix argument which (any
non-nil value) directs the command to limit the completion
alternatives to currently visited manuals.
** Rmail
-*** The Rmail commands d, C-d and u take optional repeat counts to delete or
-undelete multiple messages.
++++
+*** The Rmail commands `d', `C-d' and `u' take optional repeat counts
+to delete or undelete multiple messages.
++++
*** Rmail can now render HTML mail messages if your Emacs was built with
libxml2 or if you have the Lynx browser installed. By default, Rmail
will display the HTML version of a mail message that has both HTML and
*** In the commands that make summaries by subject, recipients, or senders,
you can no longer use commas to separate regular expressions.
++++
** SES now supports local printer functions; see `ses-define-local-printer'.
-** sh-script
+** Shell-script Mode
+---
*** In sh-mode you can now use `sh-shell' as a file-local variable to
specify the type of shell in use (bash, csh, etc).
-*** New value `always' for sh-indent-after-continuation.
+---
+*** New value `always' for `sh-indent-after-continuation'.
This provides old-style ("dumb") indentation of continued lines.
+See the doc string of `sh-indent-after-continuation' for details.
** TLS
---
** URL
++++
*** The URL package accepts now the protocols "ssh", "scp" and "rsync".
When `url-handler-mode' is enabled, file operations for these
protocols as well as for "telnet" and "ftp" are passed to Tramp.
++++
*** The URL package allows customizing the `url-user-agent' string.
The new `url-user-agent' variable can be customized to be a string or
a function.
+---
*** The new interface variable `url-request-noninteractive' can be used
to specify that we're running in a noninteractive context, and that
we should not be queried about things like TLS certificate validity.
+---
*** If URL is used with a https connection, the first callback argument
plist will contain a :peer element that has the output of
`gnutls-peer-status' (if Emacs is built with GnuTLS support).
** SQL mode
+---
*** New user variable `sql-default-directory' enables remote
connections using Tramp.
-*** New command `sql-send-line-and-next' sends the current line to the
-interactive buffer and advances to the next line, skipping whitespace
-and comments.
+---
+*** New command `sql-send-line-and-next'.
+This command, bound to `C-c C-n' by default, sends the current line to
+the SQL process and advances to the next line, skipping whitespace and
+comments.
-*** Add support for Vertica SQL.
+---
+*** Added support for Vertica SQL.
** VC and related modes
++++
*** Basic push support, via `vc-push', bound to `C-x v P'.
Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
(undocumented) command vc-hg-push now behaves slightly differently.
++++
*** The new command vc-region-history shows the log+diff of the active region.
+++
outside Emacs (e.g., from the shell prompt), or if you switch the VC
back-end for the buffer's file, or remove it from version control.
++++
*** New option `vc-annotate-background-mode' controls whether
the color range from `vc-annotate-color-map' is applied to the
background or to the foreground.
-*** `compare-windows' now compares text with the most recently used window
-instead of the next window. The new option `compare-windows-get-window-function'
-allows to customize this.
++++
+*** `compare-windows' now compares text with the most recently selected window
+instead of the next window. If you want the previous behavior of
+comparing with the next window, customize the new option
+`compare-windows-get-window-function' to the value
+`compare-windows-get-next-window'.
+---
*** Two new faces `compare-windows-removed' and `compare-windows-added'
-replace the obsolete face `compare-windows'.
+replace the face `compare-windows', which is now an obsolete alias for
+`compare-windows-added'.
---
*** `log-edit-insert-changelog' converts "(tiny change)" to
"Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
nil to disable this.
-** VHDL mode supports VHDL'08.
+---
+** VHDL mode now supports VHDL'08.
+
+** Calculator
-** Calculator: decimal display mode uses "," groups, so it's more
-fitting for use in money calculations; factorial works with
-non-integer inputs.
+---
+*** Decimal display mode uses "," groups, so it's more
+fitting for use in money calculations
+
+---
+*** Factorial works with non-integer inputs.
-** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
-interactive macro evaluation and automatic scanning of #defined symbols.
+** HideIfDef mode now support full C/C++ expressions, argumented macro
+expansions, interactive macro evaluation and automatic scanning of
+#defined symbols.
*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
alias for a private variable. `xref-push-marker-stack' and
`xref-pop-marker-stack' should be used to mutate it instead.
+---
+*** `xref-find-definitions' and `describe-function' now display
+information about mode local overrides (defined by cedet/mode-local.el
+`define-overloadable-function' `define-mode-local-overrides').
+
** etags
As a result of the above, these commands are now obsolete:
`find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
compression command is determined from the new
`dired-compress-files-alist' variable.
++++
+*** `W' is now bound to `browse-url-of-dired-file', and is useful for
+viewing HTML files and the like.
+
** Tabulated List Mode
+++
\f
* Lisp Changes in Emacs 25.1
+** pcase
+*** New UPatterns `quote', `app', `cl-struct', `eieio', `seq', and `map'.
+*** New UPatterns can be defined with `pcase-defmacro'.
++++
+*** New vector QPattern.
+
** syntax-propertize is now automatically called on-demand during forward
parsing functions like `forward-sexp'.
** A new text property `inhibit-read-only' can be used in read-only
buffers to allow certain parts of the text to be writable.
++++
+** A new variable `comment-end-can-be-escaped' is useful in languages
+ such as C and C++ where line comments with escaped newlines are
+ continued to the next line.
+
++++
+** New macro `define-advice'.
+
** `read-buffer' takes a new `predicate' argument.
** Emacs Lisp now supports generators.
windows without "fixing" it. It's supported by `fit-window-to-buffer',
`temp-buffer-resize-mode' and `display-buffer'.
++++
+** New `display-buffer' action function `display-buffer-use-some-frame'.
+This displays the buffer in an existing frame other than the current
+frame, and allows the caller to specify a frame predicate to exclude
+frames.
+
+++
** New minor mode `window-divider-mode' and options
`window-divider-default-places', `window-divider-default-bottom-width'
and `window-divider-default-right-width'.
-+++
-** New option `switch-to-buffer-in-dedicated-window' allows to customize
-how `switch-to-buffer' proceeds interactively when the selected window
-is strongly dedicated to its buffer.
-
-+++
-** The option `even-window-heights' has been renamed to
-`even-window-sizes' and now handles window widths as well.
-
** Tearoff menus and detachable toolbars for Gtk+ has been removed.
Those features have been deprecated in Gtk+ for a long time.