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| GNU Emacs NEWS -- history of user-visible changes. | |
| Copyright (C) 2017 Free Software Foundation, Inc. | |
| See the end of the file for license conditions. | |
| Please send Emacs bug reports to bug-gnu-emacs@gnu.org. | |
| 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 necessary documentation updates are complete. | |
| (This means all relevant manuals in doc/ AND lisp doc-strings.) | |
| --- means no change in the manuals is needed. | |
| When you add a new item, use the appropriate mark if you are sure it applies, | |
| * Installation Changes in Emacs 27.1 | |
| * Startup Changes in Emacs 27.1 | |
| * Changes in Emacs 27.1 | |
| --- | |
| ** The new 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. | |
| +++ | |
| ** 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. | |
| * Editing Changes in Emacs 27.1 | |
| --- | |
| ** 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). | |
| +++ | |
| ** The new user option 'electric-quote-replace-double' controls | |
| whether '"' is also replaced in 'electric-quote-mode'. If non-nil, | |
| '"' is replaced by a double typographic quote. | |
| * Changes in Specialized Modes and Packages in Emacs 27.1 | |
| ** Dired | |
| +++ | |
| *** 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. | |
| ** Ibuffer | |
| --- | |
| *** New filter ibuffer-filter-by-process; bound to '/E'. | |
| ** Edebug | |
| +++ | |
| *** The runtime behavior of Edebug's instrumentation can be changed | |
| using the new variables 'edebug-behavior-alist', | |
| 'edebug-after-instrumentation-function' and | |
| 'edebug-new-definition-function'. Edebug's behavior can be changed | |
| globally or for individual definitions. | |
| ** Enhanced xterm support | |
| *** New variable 'xterm-set-window-title' controls whether Emacs sets | |
| the XTerm window title. This feature is experimental and is disabled | |
| by default. | |
| ** Gamegrid | |
| ** ERT | |
| +++ | |
| *** New variable 'ert-quiet' allows to make ERT output in batch mode | |
| less verbose by removing non-essential information. | |
| --- | |
| *** Gamegrid now determines its default glyph size based on display | |
| dimensions, instead of always using 16 pixels. As a result, Tetris, | |
| Snake and Pong are more playable on HiDPI displays. | |
| ** Filecache | |
| --- | |
| *** Completing filenames in the minibuffer via 'C-TAB' now uses the | |
| styles as configured by the variable 'completion-styles'. | |
| * New Modes and Packages in Emacs 27.1 | |
| * Incompatible Lisp Changes in Emacs 27.1 | |
| ** The FILENAME argument to 'file-name-base' is now mandatory and no | |
| longer defaults to 'buffer-file-name'. | |
| --- | |
| ** The function 'eldoc-message' now accepts a single argument. | |
| Programs that called it with multiple arguments before should pass | |
| them through 'format' first. Even that is discouraged: for ElDoc | |
| support, you should set 'eldoc-documentation-function' instead of | |
| calling 'eldoc-message' directly. | |
| * Lisp Changes in Emacs 27.1 | |
| --- | |
| ** The 'file-system-info' function is now available on all platforms. | |
| instead of just Microsoft platforms. This fixes a 'get-free-disk-space' | |
| bug on OS X 10.8 and later (Bug#28639). | |
| --- | |
| ** The function 'get-free-disk-space' returns now a non-nil value for | |
| remote systems, which support this check. | |
| +++ | |
| ** The function 'make-string' accepts an additional optional argument. | |
| If the optional third argument is non-nil, 'make-string' will produce | |
| a multibyte string even if its second argument is an ASCII character. | |
| * Changes in Emacs 27.1 on Non-Free Operating Systems | |
| ---------------------------------------------------------------------- | |
| This file is part of GNU Emacs. | |
| GNU Emacs is free software: you can redistribute it and/or modify | |
| it under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| GNU Emacs is distributed in the hope that it will be useful, | |
| but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| GNU General Public License for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. | |
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