NEWS.27 133 KB
 Eli Zaretskii committed Dec 23, 2019 1 2 GNU Emacs NEWS -- history of user-visible changes.  Paul Eggert committed Jan 01, 2020 3 Copyright (C) 2017-2020 Free Software Foundation, Inc.  Eli Zaretskii committed Dec 23, 2019 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 committed Dec 30, 2019 27 ---  Eli Zaretskii committed Dec 23, 2019 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 committed Dec 30, 2019 34 ---  Eli Zaretskii committed Dec 23, 2019 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 committed Dec 30, 2019 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 committed Dec 23, 2019 54   Glenn Morris committed Dec 30, 2019 55 ---  Eli Zaretskii committed Dec 23, 2019 56 57 ** The configure option '--with-cairo' is no longer experimental. This builds Emacs with Cairo drawing, and supports built-in printing  Glenn Morris committed Dec 30, 2019 58 59 when Emacs is built with GTK+. Some severe bugs in this build were fixed, and we can therefore offer this to users without caveats.  Eli Zaretskii committed Dec 23, 2019 60 61 62 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), Emacs looks for the 'emacs.pdmp' file, generated during the build, in its data directory at startup, and loads the dumped state from there. The new command-line argument '--dump-file=FILE' allows to specify a  Glenn Morris committed Jan 08, 2020 72 73 non-default '.pdmp' file to load the state from; see the node "(emacs) Initial Options" in the Emacs manual for more information.  Eli Zaretskii committed Dec 23, 2019 74 75  An Emacs started via a dump file can create a new dump file only if it  Glenn Morris committed Dec 30, 2019 76 77 was invoked with the '-batch' option. (This is a temporary limitation; we plan on lifting it in a future release.)  Eli Zaretskii committed Dec 23, 2019 78 79 80 81 82  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 committed Dec 30, 2019 83 deprecated, and we plan on removing it in some future release.  Eli Zaretskii committed Dec 23, 2019 84   Glenn Morris committed Dec 30, 2019 85 ---  Eli Zaretskii committed Dec 23, 2019 86 87 88 89 ** 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 committed Dec 30, 2019 90 ---  Eli Zaretskii committed Dec 23, 2019 91 92 93 94 ** 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 committed Jan 08, 2020 95 (See "etc/DEBUG" for the details of using the modern replacements of the  Eli Zaretskii committed Dec 23, 2019 96 97 removed configure options.)  Glenn Morris committed Dec 30, 2019 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 --- ** 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 committed Dec 23, 2019 138 139 140 141 142 143 144 ** 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 committed Dec 30, 2019 145 ---  Eli Zaretskii committed Dec 23, 2019 146 147 ** New make target 'help' shows a summary of common make targets.  Glenn Morris committed Dec 30, 2019 148 149 150 151 --- ** Emacs now builds with dynamic module support by default. Pass '--without-modules' to 'configure' to disable dynamic module support.  Eli Zaretskii committed Dec 23, 2019 152 153 154 155 156 157 158 159 160  * Startup Changes in Emacs 27.1 +++ ** Emacs now uses the XDG convention for init files. For example, it looks for init.el in "~/.config/emacs/init.el", and similarly for other init files.  Glenn Morris committed Jan 08, 2020 161 The 'XDG_CONFIG_HOME' environment variable (which defaults to "~/.config")  Eli Zaretskii committed Dec 23, 2019 162 163 164 165 166 specifies the parent directory of these and other configuration files, and will override their traditional locations (the home directory, "~/.emacs.d", etc.). Emacs will still look for init files in their traditional locations if  Glenn Morris committed Jan 08, 2020 167 168 169 170 171 172 173 174 175 "$XDG_CONFIG_HOME/emacs" does not exist, but "~/.emacs.d" or "~/.emacs" does exist, so invoking Emacs with XDG_CONFIG_HOME='/nowhere' might be useful if your new-location init files are scrambled, or if you want to force Emacs to ignore files under 'XDG_CONFIG_HOME' for some other reason. If neither "$XDG_CONFIG_HOME/emacs" nor "~/.emacs.d" exist, Emacs will now default to "$XDG_CONFIG_HOME/emacs", and will create that directory and set 'user-emacs-directory' to point to it.  Eli Zaretskii committed Dec 23, 2019 176 177 178  +++ ** Emacs can now be configured using an early init file.  Glenn Morris committed Jan 08, 2020 179 The file is called "early-init.el", in 'user-emacs-directory'. It is  Eli Zaretskii committed Dec 23, 2019 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 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 emacs.service file to eg "~/.config/systemd/user/", you will need to copy the new version of the file again.) * Changes in Emacs 27.1  Glenn Morris committed Dec 30, 2019 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 +++ ** 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 committed Dec 23, 2019 275 276 277 278 279 280 281 282 283 284 285 286 +++ ** '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 committed Dec 30, 2019 287 *** emacsclient now supports the 'EMACS_SOCKET_NAME' environment variable.  Eli Zaretskii committed Dec 23, 2019 288 289 290 291 The command-line argument '--socket-name' overrides it. (The same behavior as for the pre-existing 'EMACS_SERVER_FILE' variable.) +++  Glenn Morris committed Dec 30, 2019 292 293 294 *** 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 committed Dec 23, 2019 295 296 297 298 299 300 301 302 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 committed Dec 30, 2019 303 304 305 306 307 308 309 310 --- ** '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".  Eli Zaretskii committed Dec 23, 2019 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 +++ ** 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 committed Dec 25, 2019 336 337 answers, but also function keys like 'F1', character events such as 'C-M-h', and control characters like 'C-h'.  Eli Zaretskii committed Dec 23, 2019 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422  ** Lexical binding is now used when evaluating interactive Elisp forms. More specifically, lexical-binding is now used for 'M-:', '--eval', as well as in the "*scratch*" and "*ielm*" buffers. --- ** 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 committed Dec 30, 2019 423 424 ** Japanese environments use UTF-8 by default. In Japanese environments that do not specify encodings and are not  Eli Zaretskii committed Dec 23, 2019 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 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. This triggers to search the program on the remote host as indicated by '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 committed Dec 25, 2019 461 ** The user option 'switch-to-visible-buffer' is now obsolete.  Eli Zaretskii committed Dec 23, 2019 462 463 464 Customize 'switch-to-prev-buffer-skip' instead. +++  Glenn Morris committed Dec 25, 2019 465 466 467 468 ** New user option 'switch-to-prev-buffer-skip'. This user option allows to specify the set of buffers that may be shown by 'switch-to-prev-buffer' and 'switch-to-next-buffer' more stringently than the now obsolete 'switch-to-visible-buffer'.  Eli Zaretskii committed Dec 23, 2019 469   Glenn Morris committed Jan 08, 2020 470 ** New 'flex' completion style.  Eli Zaretskii committed Dec 23, 2019 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 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 committed Dec 30, 2019 516 ---  Eli Zaretskii committed Dec 23, 2019 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 ** 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 committed Jan 08, 2020 533 mode, they are described in the manual "(emacs) Display".  Eli Zaretskii committed Dec 23, 2019 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553  +++ ** 'progress-reporter-update' accepts a suffix string to display. --- ** 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 committed Jan 08, 2020 554 555 ** The File menu-bar menu was re-arranged. Print menu items moved to submenu, and also added the new entries for tabs.  Eli Zaretskii committed Dec 23, 2019 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574  --- ** '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 committed Dec 25, 2019 575 576 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 committed Dec 23, 2019 577 578 579 580  * Editing Changes in Emacs 27.1  Glenn Morris committed Dec 30, 2019 581 582 583 584 585 586 587 +++ ** When asked to visit a large file, Emacs now offers visiting it literally. 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 committed Dec 23, 2019 588 589 590 591 592 593 594 595 596 597 598 +++ ** 'zap-to-char' now uses history of characters you used to zap to. '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 committed Dec 30, 2019 599 600 601 602 603 604 --- ** 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 committed Dec 23, 2019 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 +++ ** 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 committed Dec 30, 2019 682 683 684 685 686 +++ ** 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 committed Dec 23, 2019 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704  * Changes in Specialized Modes and Packages in Emacs 27.1 --- ** New HTML mode skeleton 'html-id-anchor'. This new command (which inserts an _ 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 committed Dec 25, 2019 705 706 following characters in 'font-lock-string-face' or 'font-lock-comment-face'. Instead, it will delay the fontification  Eli Zaretskii committed Dec 23, 2019 707 beyond the current line to give you a chance to close the string or  Glenn Morris committed Dec 25, 2019 708 comment. This is controlled by the new user option  Eli Zaretskii committed Dec 23, 2019 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 '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 acinclude.m4/aclocal.m4/acsite.m4 files. --- ** 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 committed Jan 08, 2020 733   Eli Zaretskii committed Dec 23, 2019 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 *** 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 committed Jan 08, 2020 750   Eli Zaretskii committed Dec 23, 2019 751 752 753 *** A new user option, 'winner-boring-buffers-regexp', has been added. ** table  Glenn Morris committed Jan 08, 2020 754 755  *** 'table-generate-source' and friends now support outputting wiki and  Eli Zaretskii committed Dec 23, 2019 756 757 758 759 mediawiki format tables. --- ** telnet-mode  Glenn Morris committed Jan 08, 2020 760   Eli Zaretskii committed Dec 23, 2019 761 762 763 *** Reverting a buffer in 'telnet-mode' will restart a closed connection. ** goto-addr  Glenn Morris committed Jan 08, 2020 764   Eli Zaretskii committed Dec 23, 2019 765 766 767 768 769 770 *** A way to more conveniently specify what URI address schemes that should be ignored have been added via the 'goto-address-uri-schemes-ignored' variable. +++ ** tex-mode  Glenn Morris committed Jan 08, 2020 771   Eli Zaretskii committed Dec 23, 2019 772 773 774 775 776 *** '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 committed Jan 08, 2020 777   Eli Zaretskii committed Dec 23, 2019 778 779 780 781 782 783 784 785 786 787 788 *** '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. --- *** The 'g' keystroke in *Compile-Log* buffers has been bound to a new command that will recompile the file previously compiled with 'M-x byte-compile-file' and the like. ** compile.el  Glenn Morris committed Jan 08, 2020 789   Eli Zaretskii committed Dec 23, 2019 790 791 792 --- *** In 'compilation-error-regexp-alist', 'line' (and 'end-line') can be functions.  Glenn Morris committed Jan 08, 2020 793   Eli Zaretskii committed Dec 23, 2019 794 795 796 797 798 +++ *** '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 committed Jan 08, 2020 799   Eli Zaretskii committed Dec 23, 2019 800 801 802 803 804 805 --- *** 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 committed Jan 08, 2020 806   Eli Zaretskii committed Dec 23, 2019 807 808 809 810 811 812 813 814 815 816 817 +++ *** '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 committed Jan 08, 2020 818   Eli Zaretskii committed Dec 23, 2019 819 *** New commands 'doc-view-presentation' and 'doc-view-fit-window-to-page'.  Glenn Morris committed Jan 08, 2020 820 821  *** Added support for password-protected PDF files.  Eli Zaretskii committed Dec 23, 2019 822 823 824 825 826  *** 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 committed Jan 08, 2020 827   Eli Zaretskii committed Dec 23, 2019 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 *** 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 committed Dec 25, 2019 843 area display. The new user option 'minibuffer-message-clear-timeout'  Eli Zaretskii committed Dec 23, 2019 844 845 846 847 848 849 850 851 852 853 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 committed Dec 30, 2019 854 ---  Glenn Morris committed Dec 25, 2019 855 856 *** Some commands that previously used 'read-char-choice' now read a character using the minibuffer by 'read-char-from-minibuffer'.  Eli Zaretskii committed Dec 23, 2019 857 858  ** map.el  Glenn Morris committed Jan 08, 2020 859   Eli Zaretskii committed Dec 23, 2019 860 861 862 863 864 865 866 *** 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 committed Dec 25, 2019 867 *** The 'type' arg can be a list '(hash-table :key1 VAL1 :key2 VAL2 ...)'.  Eli Zaretskii committed Dec 23, 2019 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886  ** 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 committed Dec 30, 2019 887 888 889 --- *** 'windmove-create-window' when non-nil makes a new window. This happens upon moving off the edge of the frame.  Eli Zaretskii committed Dec 23, 2019 890   Glenn Morris committed Dec 30, 2019 891 ---  Eli Zaretskii committed Dec 23, 2019 892 893 894 895 896 897 898 899 900 901 902 903 904 *** 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 committed Dec 30, 2019 905 ---  Eli Zaretskii committed Dec 23, 2019 906 907 908 909 910 911 912 913 914 *** 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 committed Dec 30, 2019 915 ---  Eli Zaretskii committed Dec 23, 2019 916 917 918 919 *** 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 committed Dec 30, 2019 920 921 922 923 --- *** 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 committed Dec 23, 2019 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 '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 committed Dec 30, 2019 942 ---  Eli Zaretskii committed Dec 23, 2019 943 944 945 *** 'tags-loop-revert-buffers' is an obsolete alias of 'fileloop-revert-buffers'.  Glenn Morris committed Dec 30, 2019 946 +++  Eli Zaretskii committed Dec 23, 2019 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 *** 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 committed Dec 30, 2019 972 973 *** New command 'dired-number-of-marked-files'. It is by default bound to '* N'.  Eli Zaretskii committed Dec 23, 2019 974   Glenn Morris committed Dec 30, 2019 975 ---  Eli Zaretskii committed Dec 23, 2019 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 *** 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 committed Dec 30, 2019 992 +++  Eli Zaretskii committed Dec 23, 2019 993 994 995 *** When the new user option 'dired-vc-rename-file' is non-nil, Dired performs file renaming using underlying version control system.  Glenn Morris committed Dec 30, 2019 996 997 998 999 --- *** Zstandard compression is now supported for 'dired-do-compress' and 'dired-do-compress-to'.  Eli Zaretskii committed Dec 23, 2019 1000 1001 ** Find-Dired  Glenn Morris committed Dec 30, 2019 1002 ---  Eli Zaretskii committed Dec 23, 2019 1003 1004 1005 1006 *** New user option 'find-dired-refine-function'. The default value is 'find-dired-sort-by-filename'. ---  Glenn Morris committed Dec 30, 2019 1007 *** New sorting options for the user option 'find-ls-option'.  Eli Zaretskii committed Dec 23, 2019 1008 1009 1010 1011 1012  ** Change Logs and VC --- *** New user option 'vc-tor'.  Glenn Morris committed Dec 25, 2019 1013 1014 1015 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 committed Dec 23, 2019 1016 1017 1018 1019 1020  +++ *** 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 committed Dec 30, 2019 1021 ---  Eli Zaretskii committed Dec 23, 2019 1022 1023 1024 1025 1026 *** '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 committed Dec 30, 2019 1027 +++  Eli Zaretskii committed Dec 23, 2019 1028 1029 1030 1031 1032 1033 1034 1035 1036 *** 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 committed Dec 30, 2019 1037 ---  Eli Zaretskii committed Dec 23, 2019 1038 1039 1040 1041 1042 1043 *** 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 committed Dec 30, 2019 1044 ---  Eli Zaretskii committed Dec 23, 2019 1045 1046 1047 1048 *** 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 committed Dec 30, 2019 1049 ---  Eli Zaretskii committed Dec 23, 2019 1050 1051 1052 1053 *** 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 committed Dec 30, 2019 1054 1055 --- *** 'vc-git-stash' is now bound to 'C' in the stash headers.  Eli Zaretskii committed Dec 23, 2019 1056   Glenn Morris committed Dec 30, 2019 1057 --  Eli Zaretskii committed Dec 23, 2019 1058 1059 1060 1061 *** 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 committed Dec 30, 2019 1062 ---  Eli Zaretskii committed Dec 23, 2019 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 *** 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 committed Jan 08, 2020 1082 *** The Hg (Mercurial) back-end now uses tags, branches and bookmarks  Eli Zaretskii committed Dec 23, 2019 1083 1084 1085 1086 1087 1088 1089 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 committed Dec 30, 2019 1090 1091 *** New user option 'vc-hg-revert-switches'. It specifies switches to pass to Hg's 'revert' command.  Eli Zaretskii committed Dec 23, 2019 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102  *** '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 committed Dec 30, 2019 1103 +++  Eli Zaretskii committed Dec 23, 2019 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 *** 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 committed Dec 30, 2019 1120 ---  Eli Zaretskii committed Dec 23, 2019 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 *** '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 committed Jan 08, 2020 1134   Eli Zaretskii committed Dec 23, 2019 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 +++ *** 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 committed Dec 30, 2019 1152 ---  Eli Zaretskii committed Dec 23, 2019 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 *** 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 committed Dec 30, 2019 1174 ---  Eli Zaretskii committed Dec 23, 2019 1175 1176 1177 1178 *** 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 committed Dec 30, 2019 1179 ---  Eli Zaretskii committed Dec 23, 2019 1180 1181 1182 1183 1184 *** 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 committed Dec 30, 2019 1185 1186 1187 --- *** New user option 'browse-url-secondary-browser-function'. It can be set to a function that invokes an alternative browser.  Eli Zaretskii committed Dec 23, 2019 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215  ** 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 committed Dec 30, 2019 1216 +++  Glenn Morris committed Dec 25, 2019 1217 *** Abnormal hook 'comint-password-function' has been added.  Eli Zaretskii committed Dec 23, 2019 1218 1219 This hook permits a derived mode to supply a password for the underlying command interpreter without prompting the user. For  Glenn Morris committed Dec 25, 2019 1220 example, in 'sql-mode', the password for connecting to the database may  Eli Zaretskii committed Dec 23, 2019 1221 1222 1223 1224 1225 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 committed Dec 25, 2019 1226 program to prompt for the password. When it does so, the password can  Eli Zaretskii committed Dec 23, 2019 1227 1228 1229 1230 1231 be supplied to the SQL interpreter without involving the user just as if it had been supplied on the command line. ** SQL  Glenn Morris committed Dec 30, 2019 1232 ---  Eli Zaretskii committed Dec 23, 2019 1233 1234 1235 1236 *** 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 committed Dec 25, 2019 1237 sparse and rules for formatting are fairly well established. Instead  Eli Zaretskii committed Dec 23, 2019 1238 1239 1240 1241 1242 1243 1244 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 committed Dec 30, 2019 1245 ---  Eli Zaretskii committed Dec 23, 2019 1246 1247 1248 1249 **** '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 committed Dec 30, 2019 1250 ---  Eli Zaretskii committed Dec 23, 2019 1251 1252 **** 'sql-mode-hook' and 'sql-interactive-mode-hook' changed. Both hook variables have had 'sql-indent-enable' added to their  Glenn Morris committed Dec 25, 2019 1253 1254 1255 default values. If you have existing customizations to these variables, you should make sure that the new default entry is included.  Eli Zaretskii committed Dec 23, 2019 1256   Glenn Morris committed Dec 30, 2019 1257 ---  Eli Zaretskii committed Dec 23, 2019 1258 1259 *** Connection Wallet Database passwords can now by stored in NETRC or JSON data files that  Glenn Morris committed Dec 25, 2019 1260 may optionally be encrypted. When establishing an interactive session  Eli Zaretskii committed Dec 23, 2019 1261 with the database via 'sql-connect' or a product specific function,  Glenn Morris committed Jan 08, 2020 1262 like 'sql-mysql' or 'sql-postgres', the password wallet will be  Glenn Morris committed Dec 25, 2019 1263 searched for the password. The 'sql-product', 'sql-server',  Eli Zaretskii committed Dec 23, 2019 1264 'sql-database', and the 'sql-username' will be used to identify the  Glenn Morris committed Dec 25, 2019 1265 appropriate authorization. This eliminates the discouraged practice of  Eli Zaretskii committed Dec 23, 2019 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 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 '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. ** 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 committed Dec 30, 2019 1290 +++  Eli Zaretskii committed Dec 23, 2019 1291 1292 1293 *** New user option 'flymake-start-on-save-buffer'. Control whether Flymake starts checking the buffer on save.  Glenn Morris committed Dec 30, 2019 1294 ---  Eli Zaretskii committed Dec 23, 2019 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 *** 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 committed Dec 30, 2019 1305 ---  Eli Zaretskii committed Dec 23, 2019 1306 1307 1308 *** The Rubocop Flymake diagnostic function will only run Lint cops if it can't find the config file.  Glenn Morris committed Dec 30, 2019 1309 ---  Eli Zaretskii committed Dec 23, 2019 1310 1311 *** Rubocop is called with 'bundle exec' if Gemfile mentions it.  Glenn Morris committed Dec 30, 2019 1312 ---  Eli Zaretskii committed Dec 23, 2019 1313 1314 1315 1316 *** New command 'ruby-find-library-file' bound to 'C-c C-f'. ** Package  Glenn Morris committed Dec 30, 2019 1317 ---  Eli Zaretskii committed Dec 23, 2019 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 *** 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 committed Dec 30, 2019 1332 1333 +++ *** Change of 'package-check-signature' for packages with multiple sigs.  Glenn Morris committed Jan 08, 2020 1334 1335 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 committed Dec 23, 2019 1336 1337 1338 1339 1340 1341 1342 1343 1344 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 committed Dec 30, 2019 1345 ---  Eli Zaretskii committed Dec 23, 2019 1346 1347 1348 *** New function 'package-get-version' lets packages query their own version. Example use in auctex.el: '(defconst auctex-version (package-get-version))'  Glenn Morris committed Dec 30, 2019 1349 ---  Eli Zaretskii committed Dec 23, 2019 1350 1351 1352 1353 *** 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 committed Dec 25, 2019 1354 It also causes user options like 'package-user-dir' and  Eli Zaretskii committed Dec 23, 2019 1355 1356 1357 1358 '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 committed Dec 30, 2019 1359 ---  Eli Zaretskii committed Dec 23, 2019 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 *** 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 committed Dec 25, 2019 1382 will update the data.  Eli Zaretskii committed Dec 23, 2019 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414  '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', 'http', and 'https'. This allows to have references to local HTML 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 committed Jan 08, 2020 1415 *** Changing 'xref-marker-ring-length' works after xref.el is loaded.  Eli Zaretskii committed Dec 23, 2019 1416 Previously, setting 'xref-marker-ring-length' would only take effect  Glenn Morris committed Jan 08, 2020 1417 if set before xref.el was loaded.  Eli Zaretskii committed Dec 23, 2019 1418 1419 1420 1421 1422 1423 1424 1425  --- *** '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 committed Dec 30, 2019 1426 ---  Eli Zaretskii committed Dec 23, 2019 1427 1428 1429 1430 1431 *** 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 committed Dec 30, 2019 1432 ---  Eli Zaretskii committed Dec 23, 2019 1433 1434 1435 *** 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 committed Jan 08, 2020 1436 only one hit. This can be altered by changing 'xref-show-xrefs-function'.  Eli Zaretskii committed Dec 23, 2019 1437   Glenn Morris committed Dec 30, 2019 1438 +++  Eli Zaretskii committed Dec 23, 2019 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 *** 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 committed Dec 25, 2019 1450 The point of this mode is to be an 'ido-mode' workalike, but provide  Eli Zaretskii committed Dec 23, 2019 1451 most of the functionality present in Icomplete that is not in  Glenn Morris committed Dec 25, 2019 1452 'ido-mode', while being much more compatible with all of Emacs's  Eli Zaretskii committed Dec 23, 2019 1453 1454 1455 1456 completion facilities. ** Ecomplete  Glenn Morris committed Dec 30, 2019 1457 ---  Glenn Morris committed Jan 08, 2020 1458 *** The Ecomplete sorting has changed to a decay-based algorithm.  Eli Zaretskii committed Dec 23, 2019 1459 1460 This can be controlled by the new 'ecomplete-sort-predicate' user option.  Glenn Morris committed Dec 30, 2019 1461 ---  Eli Zaretskii committed Dec 23, 2019 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 *** The 'ecompleterc' file is now placed in "~/.emacs.d/ecompleterc" by default. Of course it will still find it if you have it in "~/.ecompleterc". ** 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 committed Jan 08, 2020 1483 nil or t is still supported but not recommended, since it may  Eli Zaretskii committed Dec 23, 2019 1484 1485 1486 1487 1488 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 committed Dec 30, 2019 1489 *** New user option 'gnus-use-atomic-windows' makes Gnus window layouts atomic.  Glenn Morris committed Jan 08, 2020 1490 See the "(elisp) Atomic Windows" node of the Elisp manual for details.  Eli Zaretskii committed Dec 23, 2019 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511  +++ *** 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. +++ *** A prefix argument to 'gnus-summary-limit-to-score' will limit reverse. Limit to articles with score at below.  Glenn Morris committed Dec 30, 2019 1512 ---  Eli Zaretskii committed Dec 23, 2019 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 *** 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 committed Jan 08, 2020 1528 1529 *** 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 committed Dec 23, 2019 1530 1531 1532 displayed with an external program by default. +++  Glenn Morris committed Jan 08, 2020 1533 1534 1535 *** 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 committed Dec 23, 2019 1536 1537  +++  Glenn Morris committed Jan 08, 2020 1538 1539 1540 *** 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 committed Dec 23, 2019 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560  --- *** 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 committed Jan 08, 2020 1561 called from inside a 'save-excursion', as opposed to 'erc-insert-post-hook'.  Eli Zaretskii committed Dec 23, 2019 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573  --- *** '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'. ** EUDC  Glenn Morris committed Dec 30, 2019 1574 ---  Eli Zaretskii committed Dec 23, 2019 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 *** 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: '', '', and ''. ** Htmlfontify  Glenn Morris committed Dec 30, 2019 1621 +++  Eli Zaretskii committed Dec 23, 2019 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 *** 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 committed Dec 30, 2019 1637 ---  Eli Zaretskii committed Dec 23, 2019 1638 1639 1640 *** Authentication mechanisms can be added via external packages, by defining new 'cl-defmethod' of 'smtpmail-try-auth-method'.  Glenn Morris committed Dec 30, 2019 1641 +++  Eli Zaretskii committed Dec 23, 2019 1642 1643 1644 1645 1646 *** 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 committed Jan 08, 2020 1647 *** smtpmail will now try resending mail when getting a transient "4xx"  Eli Zaretskii committed Dec 23, 2019 1648 1649 1650 1651 1652 error message from the SMTP server. The new 'smtpmail-retries' user option says how many times to retry. ** Footnote mode  Glenn Morris committed Dec 30, 2019 1653 ---  Glenn Morris committed Jan 08, 2020 1654 *** Support Hebrew-style footnotes.  Glenn Morris committed Dec 30, 2019 1655 1656  ---  Eli Zaretskii committed Dec 23, 2019 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 *** Footnote text lines are now aligned. Can be controlled via the new user option 'footnote-align-to-fn-text'. ** CSS mode --- *** A new command 'css-cycle-color-format' for cycling between color formats (e.g. "black" => "#000000" => "rgb(0, 0, 0)") has been added, bound to 'C-c C-f'. --- *** CSS mode, SCSS mode, and Less CSS mode now have support for Imenu. ** SGML mode --- *** 'sgml-quote' now handles double quotes and apostrophes when escaping text and in addition all numeric entities when unescaping text. ** Python mode --- *** Python mode supports three different font lock decoration levels. The maximum level is used by default; customize 'font-lock-maximum-decoration' to tone down the decoration. --- *** New user option 'python-pdbtrack-kill-buffers'. If non-nil, the default, buffers opened during pdbtracking session are killed when pdbtracking session is finished. ---  Glenn Morris committed Jan 11, 2020 1690 *** New function 'python-shell-send-statement.  Glenn Morris committed Dec 25, 2019 1691 1692 It sends the statement delimited by 'python-nav-beginning-of-statement' and 'python-nav-end-of-statement' to the inferior Python process.  Eli Zaretskii committed Dec 23, 2019 1693 1694 1695 1696  ** Help ---  Glenn Morris committed Dec 30, 2019 1697 1698 *** Descriptions of variables and functions give an estimated first release where the variable or function appeared in Emacs.  Eli Zaretskii committed Dec 23, 2019 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723  --- *** Output format of 'C-h l' ('view-lossage') has changed. For convenience, 'view-lossage' now displays the last keystrokes and commands in the same format as the edit buffer of 'edit-last-kbd-macro'. This makes it possible to copy the lines from the buffer generated by 'view-lossage' to the "*Edit Macro*" buffer created by 'edit-last-kbd-macro', and to save the macro by 'C-c C-c'. --- *** The list of help commands produced by 'C-h C-h' ('help-for-help') can now be searched via 'C-s'. ** Ibuffer --- *** New filter 'ibuffer-filter-by-process'; bound to '/ E'. --- *** All mode filters can now accept a list of symbols. This means you can now easily filter several major modes, as well as a single mode. ** Search and Replace  Glenn Morris committed Dec 30, 2019 1724 +++  Eli Zaretskii committed Dec 23, 2019 1725 1726 1727 1728 1729 1730 1731 1732 1733 *** Isearch supports a prefix argument for 'C-s' ('isearch-repeat-forward') and 'C-r' ('isearch-repeat-backward'). With a prefix argument, these commands repeat the search for the specified occurrence of the search string. A negative argument repeats the search in the opposite direction. This makes possible also to use a prefix argument for 'M-s .' ('isearch-forward-symbol-at-point') to find the next Nth symbol. Also a prefix argument is supported for 'isearch-yank-until-char', 'isearch-yank-word-or-char', 'isearch-yank-symbol-or-char'.  Glenn Morris committed Dec 30, 2019 1734 +++  Eli Zaretskii committed Dec 23, 2019 1735 1736 1737 1738 1739 1740 1741 1742 *** To go to the first/last occurrence of the current search string is possible now with new commands 'isearch-beginning-of-buffer' and 'isearch-end-of-buffer' bound to 'M-s M-<' and 'M-s M->' in Isearch. With a numeric argument, they go to the Nth absolute occurrence counting from the beginning/end of the buffer. This complements 'C-s'/'C-r' that searches for the next Nth relative occurrence with a numeric argument.  Glenn Morris committed Dec 30, 2019 1743 +++  Eli Zaretskii committed Dec 23, 2019 1744 1745 1746 1747 *** 'isearch-lazy-count' shows the current match number and total number of matches in the Isearch prompt. User options 'lazy-count-prefix-format' and 'lazy-count-suffix-format' define the format of the current and the total number of matches in the prompt's  Glenn Morris committed Jan 08, 2020 1748 prefix and suffix, respectively.  Eli Zaretskii committed Dec 23, 2019 1749   Glenn Morris committed Dec 30, 2019 1750 ---  Eli Zaretskii committed Dec 23, 2019 1751 1752 1753 1754 1755 1756 1757 1758 1759